mirror of
https://github.com/RPCS3/llvm-mirror.git
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d282cb8542
llvm-svn: 28357
4117 lines
152 KiB
C++
4117 lines
152 KiB
C++
//===-- X86ISelLowering.h - X86 DAG Lowering Interface ----------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the interfaces that X86 uses to lower LLVM code into a
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// selection DAG.
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//
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//===----------------------------------------------------------------------===//
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#include "X86.h"
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#include "X86InstrBuilder.h"
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#include "X86ISelLowering.h"
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#include "X86TargetMachine.h"
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#include "llvm/CallingConv.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/ADT/VectorExtras.h"
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#include "llvm/Analysis/ScalarEvolutionExpressions.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/CodeGen/SSARegMap.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Target/TargetOptions.h"
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using namespace llvm;
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// FIXME: temporary.
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#include "llvm/Support/CommandLine.h"
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static cl::opt<bool> EnableFastCC("enable-x86-fastcc", cl::Hidden,
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cl::desc("Enable fastcc on X86"));
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X86TargetLowering::X86TargetLowering(TargetMachine &TM)
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: TargetLowering(TM) {
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Subtarget = &TM.getSubtarget<X86Subtarget>();
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X86ScalarSSE = Subtarget->hasSSE2();
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// Set up the TargetLowering object.
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// X86 is weird, it always uses i8 for shift amounts and setcc results.
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setShiftAmountType(MVT::i8);
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setSetCCResultType(MVT::i8);
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setSetCCResultContents(ZeroOrOneSetCCResult);
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setSchedulingPreference(SchedulingForRegPressure);
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setShiftAmountFlavor(Mask); // shl X, 32 == shl X, 0
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setStackPointerRegisterToSaveRestore(X86::ESP);
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if (!Subtarget->isTargetDarwin())
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// Darwin should use _setjmp/_longjmp instead of setjmp/longjmp.
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setUseUnderscoreSetJmpLongJmp(true);
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// Add legal addressing mode scale values.
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addLegalAddressScale(8);
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addLegalAddressScale(4);
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addLegalAddressScale(2);
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// Enter the ones which require both scale + index last. These are more
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// expensive.
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addLegalAddressScale(9);
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addLegalAddressScale(5);
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addLegalAddressScale(3);
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// Set up the register classes.
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addRegisterClass(MVT::i8, X86::GR8RegisterClass);
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addRegisterClass(MVT::i16, X86::GR16RegisterClass);
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addRegisterClass(MVT::i32, X86::GR32RegisterClass);
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// Promote all UINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have this
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// operation.
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setOperationAction(ISD::UINT_TO_FP , MVT::i1 , Promote);
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setOperationAction(ISD::UINT_TO_FP , MVT::i8 , Promote);
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setOperationAction(ISD::UINT_TO_FP , MVT::i16 , Promote);
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if (X86ScalarSSE)
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// No SSE i64 SINT_TO_FP, so expand i32 UINT_TO_FP instead.
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setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Expand);
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else
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setOperationAction(ISD::UINT_TO_FP , MVT::i32 , Promote);
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// Promote i1/i8 SINT_TO_FP to larger SINT_TO_FP's, as X86 doesn't have
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// this operation.
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setOperationAction(ISD::SINT_TO_FP , MVT::i1 , Promote);
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setOperationAction(ISD::SINT_TO_FP , MVT::i8 , Promote);
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// SSE has no i16 to fp conversion, only i32
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if (X86ScalarSSE)
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setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Promote);
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else {
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setOperationAction(ISD::SINT_TO_FP , MVT::i16 , Custom);
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setOperationAction(ISD::SINT_TO_FP , MVT::i32 , Custom);
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}
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// We can handle SINT_TO_FP and FP_TO_SINT from/to i64 even though i64
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// isn't legal.
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setOperationAction(ISD::SINT_TO_FP , MVT::i64 , Custom);
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setOperationAction(ISD::FP_TO_SINT , MVT::i64 , Custom);
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// Promote i1/i8 FP_TO_SINT to larger FP_TO_SINTS's, as X86 doesn't have
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// this operation.
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setOperationAction(ISD::FP_TO_SINT , MVT::i1 , Promote);
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setOperationAction(ISD::FP_TO_SINT , MVT::i8 , Promote);
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if (X86ScalarSSE) {
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setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Promote);
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} else {
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setOperationAction(ISD::FP_TO_SINT , MVT::i16 , Custom);
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setOperationAction(ISD::FP_TO_SINT , MVT::i32 , Custom);
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}
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// Handle FP_TO_UINT by promoting the destination to a larger signed
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// conversion.
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setOperationAction(ISD::FP_TO_UINT , MVT::i1 , Promote);
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setOperationAction(ISD::FP_TO_UINT , MVT::i8 , Promote);
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setOperationAction(ISD::FP_TO_UINT , MVT::i16 , Promote);
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if (X86ScalarSSE && !Subtarget->hasSSE3())
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// Expand FP_TO_UINT into a select.
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// FIXME: We would like to use a Custom expander here eventually to do
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// the optimal thing for SSE vs. the default expansion in the legalizer.
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setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Expand);
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else
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// With SSE3 we can use fisttpll to convert to a signed i64.
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setOperationAction(ISD::FP_TO_UINT , MVT::i32 , Promote);
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setOperationAction(ISD::BIT_CONVERT , MVT::f32 , Expand);
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setOperationAction(ISD::BIT_CONVERT , MVT::i32 , Expand);
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setOperationAction(ISD::BRCOND , MVT::Other, Custom);
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setOperationAction(ISD::BR_CC , MVT::Other, Expand);
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setOperationAction(ISD::SELECT_CC , MVT::Other, Expand);
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setOperationAction(ISD::MEMMOVE , MVT::Other, Expand);
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16 , Expand);
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
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setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
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setOperationAction(ISD::FP_ROUND_INREG , MVT::f32 , Expand);
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setOperationAction(ISD::SEXTLOAD , MVT::i1 , Expand);
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setOperationAction(ISD::FREM , MVT::f64 , Expand);
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setOperationAction(ISD::CTPOP , MVT::i8 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i8 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i8 , Expand);
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setOperationAction(ISD::CTPOP , MVT::i16 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i16 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i16 , Expand);
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setOperationAction(ISD::CTPOP , MVT::i32 , Expand);
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setOperationAction(ISD::CTTZ , MVT::i32 , Expand);
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setOperationAction(ISD::CTLZ , MVT::i32 , Expand);
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setOperationAction(ISD::READCYCLECOUNTER , MVT::i64 , Custom);
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setOperationAction(ISD::BSWAP , MVT::i16 , Expand);
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// These should be promoted to a larger select which is supported.
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setOperationAction(ISD::SELECT , MVT::i1 , Promote);
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setOperationAction(ISD::SELECT , MVT::i8 , Promote);
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// X86 wants to expand cmov itself.
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setOperationAction(ISD::SELECT , MVT::i16 , Custom);
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setOperationAction(ISD::SELECT , MVT::i32 , Custom);
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setOperationAction(ISD::SELECT , MVT::f32 , Custom);
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setOperationAction(ISD::SELECT , MVT::f64 , Custom);
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setOperationAction(ISD::SETCC , MVT::i8 , Custom);
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setOperationAction(ISD::SETCC , MVT::i16 , Custom);
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setOperationAction(ISD::SETCC , MVT::i32 , Custom);
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setOperationAction(ISD::SETCC , MVT::f32 , Custom);
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setOperationAction(ISD::SETCC , MVT::f64 , Custom);
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// X86 ret instruction may pop stack.
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setOperationAction(ISD::RET , MVT::Other, Custom);
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// Darwin ABI issue.
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setOperationAction(ISD::ConstantPool , MVT::i32 , Custom);
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setOperationAction(ISD::JumpTable , MVT::i32 , Custom);
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setOperationAction(ISD::GlobalAddress , MVT::i32 , Custom);
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setOperationAction(ISD::ExternalSymbol , MVT::i32 , Custom);
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// 64-bit addm sub, shl, sra, srl (iff 32-bit x86)
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setOperationAction(ISD::SHL_PARTS , MVT::i32 , Custom);
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setOperationAction(ISD::SRA_PARTS , MVT::i32 , Custom);
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setOperationAction(ISD::SRL_PARTS , MVT::i32 , Custom);
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// X86 wants to expand memset / memcpy itself.
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setOperationAction(ISD::MEMSET , MVT::Other, Custom);
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setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
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// We don't have line number support yet.
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setOperationAction(ISD::LOCATION, MVT::Other, Expand);
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setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
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// FIXME - use subtarget debug flags
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if (!Subtarget->isTargetDarwin())
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setOperationAction(ISD::DEBUG_LABEL, MVT::Other, Expand);
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// VASTART needs to be custom lowered to use the VarArgsFrameIndex
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setOperationAction(ISD::VASTART , MVT::Other, Custom);
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// Use the default implementation.
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setOperationAction(ISD::VAARG , MVT::Other, Expand);
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setOperationAction(ISD::VACOPY , MVT::Other, Expand);
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setOperationAction(ISD::VAEND , MVT::Other, Expand);
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setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
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setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
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setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Expand);
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setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
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setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
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if (X86ScalarSSE) {
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// Set up the FP register classes.
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addRegisterClass(MVT::f32, X86::FR32RegisterClass);
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addRegisterClass(MVT::f64, X86::FR64RegisterClass);
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// Use ANDPD to simulate FABS.
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setOperationAction(ISD::FABS , MVT::f64, Custom);
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setOperationAction(ISD::FABS , MVT::f32, Custom);
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// Use XORP to simulate FNEG.
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setOperationAction(ISD::FNEG , MVT::f64, Custom);
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setOperationAction(ISD::FNEG , MVT::f32, Custom);
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// We don't support sin/cos/fmod
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setOperationAction(ISD::FSIN , MVT::f64, Expand);
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setOperationAction(ISD::FCOS , MVT::f64, Expand);
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setOperationAction(ISD::FREM , MVT::f64, Expand);
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setOperationAction(ISD::FSIN , MVT::f32, Expand);
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setOperationAction(ISD::FCOS , MVT::f32, Expand);
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setOperationAction(ISD::FREM , MVT::f32, Expand);
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// Expand FP immediates into loads from the stack, except for the special
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// cases we handle.
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setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
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setOperationAction(ISD::ConstantFP, MVT::f32, Expand);
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addLegalFPImmediate(+0.0); // xorps / xorpd
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} else {
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// Set up the FP register classes.
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addRegisterClass(MVT::f64, X86::RFPRegisterClass);
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setOperationAction(ISD::UNDEF, MVT::f64, Expand);
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if (!UnsafeFPMath) {
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setOperationAction(ISD::FSIN , MVT::f64 , Expand);
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setOperationAction(ISD::FCOS , MVT::f64 , Expand);
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}
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setOperationAction(ISD::ConstantFP, MVT::f64, Expand);
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addLegalFPImmediate(+0.0); // FLD0
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addLegalFPImmediate(+1.0); // FLD1
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addLegalFPImmediate(-0.0); // FLD0/FCHS
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addLegalFPImmediate(-1.0); // FLD1/FCHS
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}
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// First set operation action for all vector types to expand. Then we
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// will selectively turn on ones that can be effectively codegen'd.
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for (unsigned VT = (unsigned)MVT::Vector + 1;
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VT != (unsigned)MVT::LAST_VALUETYPE; VT++) {
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setOperationAction(ISD::ADD , (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::SUB , (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::MUL , (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
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setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Expand);
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}
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if (Subtarget->hasMMX()) {
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addRegisterClass(MVT::v8i8, X86::VR64RegisterClass);
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addRegisterClass(MVT::v4i16, X86::VR64RegisterClass);
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addRegisterClass(MVT::v2i32, X86::VR64RegisterClass);
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// FIXME: add MMX packed arithmetics
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setOperationAction(ISD::BUILD_VECTOR, MVT::v8i8, Expand);
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setOperationAction(ISD::BUILD_VECTOR, MVT::v4i16, Expand);
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setOperationAction(ISD::BUILD_VECTOR, MVT::v2i32, Expand);
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}
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if (Subtarget->hasSSE1()) {
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addRegisterClass(MVT::v4f32, X86::VR128RegisterClass);
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setOperationAction(ISD::AND, MVT::v4f32, Legal);
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setOperationAction(ISD::OR, MVT::v4f32, Legal);
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setOperationAction(ISD::XOR, MVT::v4f32, Legal);
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setOperationAction(ISD::ADD, MVT::v4f32, Legal);
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setOperationAction(ISD::SUB, MVT::v4f32, Legal);
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setOperationAction(ISD::MUL, MVT::v4f32, Legal);
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setOperationAction(ISD::LOAD, MVT::v4f32, Legal);
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setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
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setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v4f32, Custom);
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setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v4f32, Custom);
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setOperationAction(ISD::SELECT, MVT::v4f32, Custom);
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}
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if (Subtarget->hasSSE2()) {
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addRegisterClass(MVT::v2f64, X86::VR128RegisterClass);
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addRegisterClass(MVT::v16i8, X86::VR128RegisterClass);
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addRegisterClass(MVT::v8i16, X86::VR128RegisterClass);
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addRegisterClass(MVT::v4i32, X86::VR128RegisterClass);
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addRegisterClass(MVT::v2i64, X86::VR128RegisterClass);
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setOperationAction(ISD::ADD, MVT::v2f64, Legal);
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setOperationAction(ISD::ADD, MVT::v16i8, Legal);
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setOperationAction(ISD::ADD, MVT::v8i16, Legal);
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setOperationAction(ISD::ADD, MVT::v4i32, Legal);
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setOperationAction(ISD::SUB, MVT::v2f64, Legal);
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setOperationAction(ISD::SUB, MVT::v16i8, Legal);
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setOperationAction(ISD::SUB, MVT::v8i16, Legal);
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setOperationAction(ISD::SUB, MVT::v4i32, Legal);
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setOperationAction(ISD::MUL, MVT::v8i16, Legal);
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setOperationAction(ISD::MUL, MVT::v2f64, Legal);
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setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v16i8, Custom);
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setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v8i16, Custom);
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setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v8i16, Custom);
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setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4i32, Custom);
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// Implement v4f32 insert_vector_elt in terms of SSE2 v8i16 ones.
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setOperationAction(ISD::INSERT_VECTOR_ELT, MVT::v4f32, Custom);
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// Custom lower build_vector, vector_shuffle, and extract_vector_elt.
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for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
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setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Custom);
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setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Custom);
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setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Custom);
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}
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setOperationAction(ISD::BUILD_VECTOR, MVT::v2f64, Custom);
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setOperationAction(ISD::BUILD_VECTOR, MVT::v2i64, Custom);
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setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2f64, Custom);
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setOperationAction(ISD::VECTOR_SHUFFLE, MVT::v2i64, Custom);
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setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2f64, Custom);
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setOperationAction(ISD::EXTRACT_VECTOR_ELT, MVT::v2i64, Custom);
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// Promote v16i8, v8i16, v4i32 load, select, and, or, xor to v2i64.
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for (unsigned VT = (unsigned)MVT::v16i8; VT != (unsigned)MVT::v2i64; VT++) {
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setOperationAction(ISD::AND, (MVT::ValueType)VT, Promote);
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AddPromotedToType (ISD::AND, (MVT::ValueType)VT, MVT::v2i64);
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setOperationAction(ISD::OR, (MVT::ValueType)VT, Promote);
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AddPromotedToType (ISD::OR, (MVT::ValueType)VT, MVT::v2i64);
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setOperationAction(ISD::XOR, (MVT::ValueType)VT, Promote);
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AddPromotedToType (ISD::XOR, (MVT::ValueType)VT, MVT::v2i64);
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setOperationAction(ISD::LOAD, (MVT::ValueType)VT, Promote);
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AddPromotedToType (ISD::LOAD, (MVT::ValueType)VT, MVT::v2i64);
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setOperationAction(ISD::SELECT, (MVT::ValueType)VT, Promote);
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AddPromotedToType (ISD::SELECT, (MVT::ValueType)VT, MVT::v2i64);
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}
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// Custom lower v2i64 and v2f64 selects.
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setOperationAction(ISD::LOAD, MVT::v2f64, Legal);
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setOperationAction(ISD::LOAD, MVT::v2i64, Legal);
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setOperationAction(ISD::SELECT, MVT::v2f64, Custom);
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setOperationAction(ISD::SELECT, MVT::v2i64, Custom);
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}
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// We want to custom lower some of our intrinsics.
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setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
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computeRegisterProperties();
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// FIXME: These should be based on subtarget info. Plus, the values should
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// be smaller when we are in optimizing for size mode.
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maxStoresPerMemset = 16; // For %llvm.memset -> sequence of stores
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maxStoresPerMemcpy = 16; // For %llvm.memcpy -> sequence of stores
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maxStoresPerMemmove = 16; // For %llvm.memmove -> sequence of stores
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allowUnalignedMemoryAccesses = true; // x86 supports it!
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}
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std::vector<SDOperand>
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X86TargetLowering::LowerArguments(Function &F, SelectionDAG &DAG) {
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std::vector<SDOperand> Args = TargetLowering::LowerArguments(F, DAG);
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FormalArgs.clear();
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FormalArgLocs.clear();
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|
|
// This sets BytesToPopOnReturn, BytesCallerReserves, etc. which have to be
|
|
// set before the rest of the function can be lowered.
|
|
if (F.getCallingConv() == CallingConv::Fast && EnableFastCC)
|
|
PreprocessFastCCArguments(Args, F, DAG);
|
|
else
|
|
PreprocessCCCArguments(Args, F, DAG);
|
|
return Args;
|
|
}
|
|
|
|
std::pair<SDOperand, SDOperand>
|
|
X86TargetLowering::LowerCallTo(SDOperand Chain, const Type *RetTy,
|
|
bool isVarArg, unsigned CallingConv,
|
|
bool isTailCall,
|
|
SDOperand Callee, ArgListTy &Args,
|
|
SelectionDAG &DAG) {
|
|
assert((!isVarArg || CallingConv == CallingConv::C) &&
|
|
"Only C takes varargs!");
|
|
|
|
// If the callee is a GlobalAddress node (quite common, every direct call is)
|
|
// turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
|
|
if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
|
|
Callee = DAG.getTargetGlobalAddress(G->getGlobal(), getPointerTy());
|
|
else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
|
|
Callee = DAG.getTargetExternalSymbol(S->getSymbol(), getPointerTy());
|
|
|
|
if (CallingConv == CallingConv::Fast && EnableFastCC)
|
|
return LowerFastCCCallTo(Chain, RetTy, isTailCall, Callee, Args, DAG);
|
|
return LowerCCCCallTo(Chain, RetTy, isVarArg, isTailCall, Callee, Args, DAG);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// C Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// AddLiveIn - This helper function adds the specified physical register to the
|
|
/// MachineFunction as a live in value. It also creates a corresponding virtual
|
|
/// register for it.
|
|
static unsigned AddLiveIn(MachineFunction &MF, unsigned PReg,
|
|
TargetRegisterClass *RC) {
|
|
assert(RC->contains(PReg) && "Not the correct regclass!");
|
|
unsigned VReg = MF.getSSARegMap()->createVirtualRegister(RC);
|
|
MF.addLiveIn(PReg, VReg);
|
|
return VReg;
|
|
}
|
|
|
|
/// HowToPassCCCArgument - Returns how an formal argument of the specified type
|
|
/// should be passed. If it is through stack, returns the size of the stack
|
|
/// frame; if it is through XMM register, returns the number of XMM registers
|
|
/// are needed.
|
|
static void
|
|
HowToPassCCCArgument(MVT::ValueType ObjectVT, unsigned NumXMMRegs,
|
|
unsigned &ObjSize, unsigned &ObjXMMRegs) {
|
|
switch (ObjectVT) {
|
|
default: assert(0 && "Unhandled argument type!");
|
|
case MVT::i1:
|
|
case MVT::i8: ObjSize = 1; break;
|
|
case MVT::i16: ObjSize = 2; break;
|
|
case MVT::i32: ObjSize = 4; break;
|
|
case MVT::i64: ObjSize = 8; break;
|
|
case MVT::f32: ObjSize = 4; break;
|
|
case MVT::f64: ObjSize = 8; break;
|
|
case MVT::v16i8:
|
|
case MVT::v8i16:
|
|
case MVT::v4i32:
|
|
case MVT::v2i64:
|
|
case MVT::v4f32:
|
|
case MVT::v2f64:
|
|
if (NumXMMRegs < 3)
|
|
ObjXMMRegs = 1;
|
|
else
|
|
ObjSize = 16;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/// getFormalArgObjects - Returns itself if Op is a FORMAL_ARGUMENTS, otherwise
|
|
/// returns the FORMAL_ARGUMENTS node(s) that made up parts of the node.
|
|
static std::vector<SDOperand> getFormalArgObjects(SDOperand Op) {
|
|
unsigned Opc = Op.getOpcode();
|
|
std::vector<SDOperand> Objs;
|
|
if (Opc == ISD::TRUNCATE) {
|
|
Op = Op.getOperand(0);
|
|
assert(Op.getOpcode() == ISD::AssertSext ||
|
|
Op.getOpcode() == ISD::AssertZext);
|
|
Objs.push_back(Op.getOperand(0));
|
|
} else if (Opc == ISD::FP_ROUND || Opc == ISD::VBIT_CONVERT) {
|
|
Objs.push_back(Op.getOperand(0));
|
|
} else if (Opc == ISD::BUILD_PAIR) {
|
|
Objs.push_back(Op.getOperand(0));
|
|
Objs.push_back(Op.getOperand(1));
|
|
} else {
|
|
Objs.push_back(Op);
|
|
}
|
|
return Objs;
|
|
}
|
|
|
|
void X86TargetLowering::PreprocessCCCArguments(std::vector<SDOperand> &Args,
|
|
Function &F, SelectionDAG &DAG) {
|
|
unsigned NumArgs = Args.size();
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
// Add DAG nodes to load the arguments... On entry to a function on the X86,
|
|
// the stack frame looks like this:
|
|
//
|
|
// [ESP] -- return address
|
|
// [ESP + 4] -- first argument (leftmost lexically)
|
|
// [ESP + 8] -- second argument, if first argument is four bytes in size
|
|
// ...
|
|
//
|
|
unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
|
|
unsigned NumXMMRegs = 0; // XMM regs used for parameter passing.
|
|
unsigned XMMArgRegs[] = { X86::XMM0, X86::XMM1, X86::XMM2 };
|
|
for (unsigned i = 0; i < NumArgs; ++i) {
|
|
SDOperand Op = Args[i];
|
|
std::vector<SDOperand> Objs = getFormalArgObjects(Op);
|
|
for (std::vector<SDOperand>::iterator I = Objs.begin(), E = Objs.end();
|
|
I != E; ++I) {
|
|
SDOperand Obj = *I;
|
|
MVT::ValueType ObjectVT = Obj.getValueType();
|
|
unsigned ArgIncrement = 4;
|
|
unsigned ObjSize = 0;
|
|
unsigned ObjXMMRegs = 0;
|
|
HowToPassCCCArgument(ObjectVT, NumXMMRegs, ObjSize, ObjXMMRegs);
|
|
if (ObjSize >= 8)
|
|
ArgIncrement = ObjSize;
|
|
|
|
if (ObjXMMRegs) {
|
|
// Passed in a XMM register.
|
|
unsigned Reg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs],
|
|
X86::VR128RegisterClass);
|
|
std::pair<FALocInfo, FALocInfo> Loc =
|
|
std::make_pair(FALocInfo(FALocInfo::LiveInRegLoc, Reg, ObjectVT),
|
|
FALocInfo());
|
|
FormalArgLocs.push_back(Loc);
|
|
NumXMMRegs += ObjXMMRegs;
|
|
} else {
|
|
// Create the frame index object for this incoming parameter...
|
|
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
|
|
std::pair<FALocInfo, FALocInfo> Loc =
|
|
std::make_pair(FALocInfo(FALocInfo::StackFrameLoc, FI), FALocInfo());
|
|
FormalArgLocs.push_back(Loc);
|
|
ArgOffset += ArgIncrement; // Move on to the next argument...
|
|
}
|
|
}
|
|
}
|
|
|
|
// If the function takes variable number of arguments, make a frame index for
|
|
// the start of the first vararg value... for expansion of llvm.va_start.
|
|
if (F.isVarArg())
|
|
VarArgsFrameIndex = MFI->CreateFixedObject(1, ArgOffset);
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
BytesToPopOnReturn = 0; // Callee pops nothing.
|
|
BytesCallerReserves = ArgOffset;
|
|
}
|
|
|
|
void X86TargetLowering::LowerCCCArguments(SDOperand Op, SelectionDAG &DAG) {
|
|
unsigned NumArgs = Op.Val->getNumValues() - 1;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
for (unsigned i = 0; i < NumArgs; ++i) {
|
|
std::pair<FALocInfo, FALocInfo> Loc = FormalArgLocs[i];
|
|
SDOperand ArgValue;
|
|
if (Loc.first.Kind == FALocInfo::StackFrameLoc) {
|
|
// Create the SelectionDAG nodes corresponding to a load from this
|
|
// parameter.
|
|
unsigned FI = FormalArgLocs[i].first.Loc;
|
|
SDOperand FIN = DAG.getFrameIndex(FI, MVT::i32);
|
|
ArgValue = DAG.getLoad(Op.Val->getValueType(i),
|
|
DAG.getEntryNode(), FIN, DAG.getSrcValue(NULL));
|
|
} else {
|
|
// Must be a CopyFromReg
|
|
ArgValue= DAG.getCopyFromReg(DAG.getEntryNode(), Loc.first.Loc,
|
|
Loc.first.Typ);
|
|
}
|
|
FormalArgs.push_back(ArgValue);
|
|
}
|
|
// Provide a chain. Note that this isn't the right one, but it works as well
|
|
// as before.
|
|
FormalArgs.push_back(DAG.getEntryNode());
|
|
}
|
|
|
|
std::pair<SDOperand, SDOperand>
|
|
X86TargetLowering::LowerCCCCallTo(SDOperand Chain, const Type *RetTy,
|
|
bool isVarArg, bool isTailCall,
|
|
SDOperand Callee, ArgListTy &Args,
|
|
SelectionDAG &DAG) {
|
|
// Count how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = 0;
|
|
|
|
// Keep track of the number of XMM regs passed so far.
|
|
unsigned NumXMMRegs = 0;
|
|
unsigned XMMArgRegs[] = { X86::XMM0, X86::XMM1, X86::XMM2 };
|
|
|
|
std::vector<SDOperand> RegValuesToPass;
|
|
if (Args.empty()) {
|
|
// Save zero bytes.
|
|
Chain = DAG.getCALLSEQ_START(Chain, DAG.getConstant(0, getPointerTy()));
|
|
} else {
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i)
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unknown value type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
case MVT::f32:
|
|
NumBytes += 4;
|
|
break;
|
|
case MVT::i64:
|
|
case MVT::f64:
|
|
NumBytes += 8;
|
|
break;
|
|
case MVT::Vector:
|
|
if (NumXMMRegs < 3)
|
|
++NumXMMRegs;
|
|
else
|
|
NumBytes += 16;
|
|
break;
|
|
}
|
|
|
|
Chain = DAG.getCALLSEQ_START(Chain,
|
|
DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
// Arguments go on the stack in reverse order, as specified by the ABI.
|
|
unsigned ArgOffset = 0;
|
|
NumXMMRegs = 0;
|
|
SDOperand StackPtr = DAG.getRegister(X86::ESP, MVT::i32);
|
|
std::vector<SDOperand> Stores;
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i) {
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unexpected ValueType for argument!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
// Promote the integer to 32 bits. If the input type is signed use a
|
|
// sign extend, otherwise use a zero extend.
|
|
if (Args[i].second->isSigned())
|
|
Args[i].first =DAG.getNode(ISD::SIGN_EXTEND, MVT::i32, Args[i].first);
|
|
else
|
|
Args[i].first =DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Args[i].first);
|
|
|
|
// FALL THROUGH
|
|
case MVT::i32:
|
|
case MVT::f32: {
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 4;
|
|
break;
|
|
}
|
|
case MVT::i64:
|
|
case MVT::f64: {
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 8;
|
|
break;
|
|
}
|
|
case MVT::Vector:
|
|
if (NumXMMRegs < 3) {
|
|
RegValuesToPass.push_back(Args[i].first);
|
|
NumXMMRegs++;
|
|
} else {
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 16;
|
|
}
|
|
}
|
|
}
|
|
if (!Stores.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
|
|
}
|
|
|
|
std::vector<MVT::ValueType> RetVals;
|
|
MVT::ValueType RetTyVT = getValueType(RetTy);
|
|
RetVals.push_back(MVT::Other);
|
|
|
|
// The result values produced have to be legal. Promote the result.
|
|
switch (RetTyVT) {
|
|
case MVT::isVoid: break;
|
|
default:
|
|
RetVals.push_back(RetTyVT);
|
|
break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
case MVT::f32:
|
|
if (X86ScalarSSE)
|
|
RetVals.push_back(MVT::f32);
|
|
else
|
|
RetVals.push_back(MVT::f64);
|
|
break;
|
|
case MVT::i64:
|
|
RetVals.push_back(MVT::i32);
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
}
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token chain
|
|
// and flag operands which copy the outgoing args into registers.
|
|
SDOperand InFlag;
|
|
for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
|
|
unsigned CCReg = XMMArgRegs[i];
|
|
SDOperand RegToPass = RegValuesToPass[i];
|
|
assert(RegToPass.getValueType() == MVT::Vector);
|
|
unsigned NumElems =
|
|
cast<ConstantSDNode>(*(RegToPass.Val->op_end()-2))->getValue();
|
|
MVT::ValueType EVT = cast<VTSDNode>(*(RegToPass.Val->op_end()-1))->getVT();
|
|
MVT::ValueType PVT = getVectorType(EVT, NumElems);
|
|
SDOperand CCRegNode = DAG.getRegister(CCReg, PVT);
|
|
RegToPass = DAG.getNode(ISD::VBIT_CONVERT, PVT, RegToPass);
|
|
Chain = DAG.getCopyToReg(Chain, CCRegNode, RegToPass, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
std::vector<MVT::ValueType> NodeTys;
|
|
NodeTys.push_back(MVT::Other); // Returns a chain
|
|
NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
if (InFlag.Val)
|
|
Ops.push_back(InFlag);
|
|
|
|
// FIXME: Do not generate X86ISD::TAILCALL for now.
|
|
Chain = DAG.getNode(X86ISD::CALL, NodeTys, Ops);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
NodeTys.clear();
|
|
NodeTys.push_back(MVT::Other); // Returns a chain
|
|
NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getConstant(NumBytes, getPointerTy()));
|
|
Ops.push_back(DAG.getConstant(0, getPointerTy()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, Ops);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
SDOperand RetVal;
|
|
if (RetTyVT != MVT::isVoid) {
|
|
switch (RetTyVT) {
|
|
default: assert(0 && "Unknown value type to return!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
if (RetTyVT == MVT::i1)
|
|
RetVal = DAG.getNode(ISD::TRUNCATE, MVT::i1, RetVal);
|
|
break;
|
|
case MVT::i16:
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
break;
|
|
case MVT::i32:
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
break;
|
|
case MVT::i64: {
|
|
SDOperand Lo = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
|
|
SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), X86::EDX, MVT::i32,
|
|
Lo.getValue(2));
|
|
RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
|
|
Chain = Hi.getValue(1);
|
|
break;
|
|
}
|
|
case MVT::f32:
|
|
case MVT::f64: {
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::f64);
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(InFlag);
|
|
RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, Ops);
|
|
Chain = RetVal.getValue(1);
|
|
InFlag = RetVal.getValue(2);
|
|
if (X86ScalarSSE) {
|
|
// FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
|
|
// shouldn't be necessary except that RFP cannot be live across
|
|
// multiple blocks. When stackifier is fixed, they can be uncoupled.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
Tys.clear();
|
|
Tys.push_back(MVT::Other);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(RetVal);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(RetTyVT));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::FST, Tys, Ops);
|
|
RetVal = DAG.getLoad(RetTyVT, Chain, StackSlot,
|
|
DAG.getSrcValue(NULL));
|
|
Chain = RetVal.getValue(1);
|
|
}
|
|
|
|
if (RetTyVT == MVT::f32 && !X86ScalarSSE)
|
|
// FIXME: we would really like to remember that this FP_ROUND
|
|
// operation is okay to eliminate if we allow excess FP precision.
|
|
RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
|
|
break;
|
|
}
|
|
case MVT::Vector: {
|
|
const PackedType *PTy = cast<PackedType>(RetTy);
|
|
MVT::ValueType EVT;
|
|
MVT::ValueType LVT;
|
|
unsigned NumRegs = getPackedTypeBreakdown(PTy, EVT, LVT);
|
|
assert(NumRegs == 1 && "Unsupported type!");
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::XMM0, EVT, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return std::make_pair(RetVal, Chain);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Fast Calling Convention implementation
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The X86 'fast' calling convention passes up to two integer arguments in
|
|
// registers (an appropriate portion of EAX/EDX), passes arguments in C order,
|
|
// and requires that the callee pop its arguments off the stack (allowing proper
|
|
// tail calls), and has the same return value conventions as C calling convs.
|
|
//
|
|
// This calling convention always arranges for the callee pop value to be 8n+4
|
|
// bytes, which is needed for tail recursion elimination and stack alignment
|
|
// reasons.
|
|
//
|
|
// Note that this can be enhanced in the future to pass fp vals in registers
|
|
// (when we have a global fp allocator) and do other tricks.
|
|
//
|
|
|
|
// FASTCC_NUM_INT_ARGS_INREGS - This is the max number of integer arguments
|
|
// to pass in registers. 0 is none, 1 is is "use EAX", 2 is "use EAX and
|
|
// EDX". Anything more is illegal.
|
|
//
|
|
// FIXME: The linscan register allocator currently has problem with
|
|
// coalescing. At the time of this writing, whenever it decides to coalesce
|
|
// a physreg with a virtreg, this increases the size of the physreg's live
|
|
// range, and the live range cannot ever be reduced. This causes problems if
|
|
// too many physregs are coaleced with virtregs, which can cause the register
|
|
// allocator to wedge itself.
|
|
//
|
|
// This code triggers this problem more often if we pass args in registers,
|
|
// so disable it until this is fixed.
|
|
//
|
|
// NOTE: this isn't marked const, so that GCC doesn't emit annoying warnings
|
|
// about code being dead.
|
|
//
|
|
static unsigned FASTCC_NUM_INT_ARGS_INREGS = 0;
|
|
|
|
|
|
/// HowToPassFastCCArgument - Returns how an formal argument of the specified
|
|
/// type should be passed. If it is through stack, returns the size of the stack
|
|
/// frame; if it is through integer or XMM register, returns the number of
|
|
/// integer or XMM registers are needed.
|
|
static void
|
|
HowToPassFastCCArgument(MVT::ValueType ObjectVT,
|
|
unsigned NumIntRegs, unsigned NumXMMRegs,
|
|
unsigned &ObjSize, unsigned &ObjIntRegs,
|
|
unsigned &ObjXMMRegs) {
|
|
ObjSize = 0;
|
|
NumIntRegs = 0;
|
|
|
|
switch (ObjectVT) {
|
|
default: assert(0 && "Unhandled argument type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS)
|
|
ObjIntRegs = 1;
|
|
else
|
|
ObjSize = 1;
|
|
break;
|
|
case MVT::i16:
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS)
|
|
ObjIntRegs = 1;
|
|
else
|
|
ObjSize = 2;
|
|
break;
|
|
case MVT::i32:
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS)
|
|
ObjIntRegs = 1;
|
|
else
|
|
ObjSize = 4;
|
|
break;
|
|
case MVT::i64:
|
|
if (NumIntRegs+2 <= FASTCC_NUM_INT_ARGS_INREGS) {
|
|
ObjIntRegs = 2;
|
|
} else if (NumIntRegs+1 <= FASTCC_NUM_INT_ARGS_INREGS) {
|
|
ObjIntRegs = 1;
|
|
ObjSize = 4;
|
|
} else
|
|
ObjSize = 8;
|
|
case MVT::f32:
|
|
ObjSize = 4;
|
|
break;
|
|
case MVT::f64:
|
|
ObjSize = 8;
|
|
break;
|
|
case MVT::v16i8:
|
|
case MVT::v8i16:
|
|
case MVT::v4i32:
|
|
case MVT::v2i64:
|
|
case MVT::v4f32:
|
|
case MVT::v2f64:
|
|
if (NumXMMRegs < 3)
|
|
ObjXMMRegs = 1;
|
|
else
|
|
ObjSize = 16;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
X86TargetLowering::PreprocessFastCCArguments(std::vector<SDOperand> &Args,
|
|
Function &F, SelectionDAG &DAG) {
|
|
unsigned NumArgs = Args.size();
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
MachineFrameInfo *MFI = MF.getFrameInfo();
|
|
|
|
// Add DAG nodes to load the arguments... On entry to a function the stack
|
|
// frame looks like this:
|
|
//
|
|
// [ESP] -- return address
|
|
// [ESP + 4] -- first nonreg argument (leftmost lexically)
|
|
// [ESP + 8] -- second nonreg argument, if first argument is 4 bytes in size
|
|
// ...
|
|
unsigned ArgOffset = 0; // Frame mechanisms handle retaddr slot
|
|
|
|
// Keep track of the number of integer regs passed so far. This can be either
|
|
// 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
|
|
// used).
|
|
unsigned NumIntRegs = 0;
|
|
unsigned NumXMMRegs = 0; // XMM regs used for parameter passing.
|
|
unsigned XMMArgRegs[] = { X86::XMM0, X86::XMM1, X86::XMM2 };
|
|
|
|
for (unsigned i = 0; i < NumArgs; ++i) {
|
|
SDOperand Op = Args[i];
|
|
std::vector<SDOperand> Objs = getFormalArgObjects(Op);
|
|
for (std::vector<SDOperand>::iterator I = Objs.begin(), E = Objs.end();
|
|
I != E; ++I) {
|
|
SDOperand Obj = *I;
|
|
MVT::ValueType ObjectVT = Obj.getValueType();
|
|
unsigned ArgIncrement = 4;
|
|
unsigned ObjSize = 0;
|
|
unsigned ObjIntRegs = 0;
|
|
unsigned ObjXMMRegs = 0;
|
|
|
|
HowToPassFastCCArgument(ObjectVT, NumIntRegs, NumXMMRegs,
|
|
ObjSize, ObjIntRegs, ObjXMMRegs);
|
|
if (ObjSize >= 8)
|
|
ArgIncrement = ObjSize;
|
|
|
|
unsigned Reg;
|
|
std::pair<FALocInfo,FALocInfo> Loc = std::make_pair(FALocInfo(),
|
|
FALocInfo());
|
|
if (ObjIntRegs) {
|
|
switch (ObjectVT) {
|
|
default: assert(0 && "Unhandled argument type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
Reg = AddLiveIn(MF, NumIntRegs ? X86::DL : X86::AL,
|
|
X86::GR8RegisterClass);
|
|
Loc.first.Kind = FALocInfo::LiveInRegLoc;
|
|
Loc.first.Loc = Reg;
|
|
Loc.first.Typ = MVT::i8;
|
|
break;
|
|
case MVT::i16:
|
|
Reg = AddLiveIn(MF, NumIntRegs ? X86::DX : X86::AX,
|
|
X86::GR16RegisterClass);
|
|
Loc.first.Kind = FALocInfo::LiveInRegLoc;
|
|
Loc.first.Loc = Reg;
|
|
Loc.first.Typ = MVT::i16;
|
|
break;
|
|
case MVT::i32:
|
|
Reg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::EAX,
|
|
X86::GR32RegisterClass);
|
|
Loc.first.Kind = FALocInfo::LiveInRegLoc;
|
|
Loc.first.Loc = Reg;
|
|
Loc.first.Typ = MVT::i32;
|
|
break;
|
|
case MVT::i64:
|
|
Reg = AddLiveIn(MF, NumIntRegs ? X86::EDX : X86::EAX,
|
|
X86::GR32RegisterClass);
|
|
Loc.first.Kind = FALocInfo::LiveInRegLoc;
|
|
Loc.first.Loc = Reg;
|
|
Loc.first.Typ = MVT::i32;
|
|
if (ObjIntRegs == 2) {
|
|
Reg = AddLiveIn(MF, X86::EDX, X86::GR32RegisterClass);
|
|
Loc.second.Kind = FALocInfo::LiveInRegLoc;
|
|
Loc.second.Loc = Reg;
|
|
Loc.second.Typ = MVT::i32;
|
|
}
|
|
break;
|
|
case MVT::v16i8:
|
|
case MVT::v8i16:
|
|
case MVT::v4i32:
|
|
case MVT::v2i64:
|
|
case MVT::v4f32:
|
|
case MVT::v2f64:
|
|
Reg = AddLiveIn(MF, XMMArgRegs[NumXMMRegs], X86::VR128RegisterClass);
|
|
Loc.first.Kind = FALocInfo::LiveInRegLoc;
|
|
Loc.first.Loc = Reg;
|
|
Loc.first.Typ = ObjectVT;
|
|
break;
|
|
}
|
|
NumIntRegs += ObjIntRegs;
|
|
NumXMMRegs += ObjXMMRegs;
|
|
}
|
|
if (ObjSize) {
|
|
int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
|
|
if (ObjectVT == MVT::i64 && ObjIntRegs) {
|
|
Loc.second.Kind = FALocInfo::StackFrameLoc;
|
|
Loc.second.Loc = FI;
|
|
} else {
|
|
Loc.first.Kind = FALocInfo::StackFrameLoc;
|
|
Loc.first.Loc = FI;
|
|
}
|
|
ArgOffset += ArgIncrement; // Move on to the next argument.
|
|
}
|
|
|
|
FormalArgLocs.push_back(Loc);
|
|
}
|
|
}
|
|
|
|
// Make sure the instruction takes 8n+4 bytes to make sure the start of the
|
|
// arguments and the arguments after the retaddr has been pushed are aligned.
|
|
if ((ArgOffset & 7) == 0)
|
|
ArgOffset += 4;
|
|
|
|
VarArgsFrameIndex = 0xAAAAAAA; // fastcc functions can't have varargs.
|
|
ReturnAddrIndex = 0; // No return address slot generated yet.
|
|
BytesToPopOnReturn = ArgOffset; // Callee pops all stack arguments.
|
|
BytesCallerReserves = 0;
|
|
|
|
// Finally, inform the code generator which regs we return values in.
|
|
switch (getValueType(F.getReturnType())) {
|
|
default: assert(0 && "Unknown type!");
|
|
case MVT::isVoid: break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
MF.addLiveOut(X86::EAX);
|
|
break;
|
|
case MVT::i64:
|
|
MF.addLiveOut(X86::EAX);
|
|
MF.addLiveOut(X86::EDX);
|
|
break;
|
|
case MVT::f32:
|
|
case MVT::f64:
|
|
MF.addLiveOut(X86::ST0);
|
|
break;
|
|
case MVT::Vector: {
|
|
const PackedType *PTy = cast<PackedType>(F.getReturnType());
|
|
MVT::ValueType EVT;
|
|
MVT::ValueType LVT;
|
|
unsigned NumRegs = getPackedTypeBreakdown(PTy, EVT, LVT);
|
|
assert(NumRegs == 1 && "Unsupported type!");
|
|
MF.addLiveOut(X86::XMM0);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
X86TargetLowering::LowerFastCCArguments(SDOperand Op, SelectionDAG &DAG) {
|
|
unsigned NumArgs = Op.Val->getNumValues()-1;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
|
|
for (unsigned i = 0; i < NumArgs; ++i) {
|
|
MVT::ValueType VT = Op.Val->getValueType(i);
|
|
std::pair<FALocInfo, FALocInfo> Loc = FormalArgLocs[i];
|
|
SDOperand ArgValue;
|
|
if (Loc.first.Kind == FALocInfo::StackFrameLoc) {
|
|
// Create the SelectionDAG nodes corresponding to a load from this
|
|
// parameter.
|
|
SDOperand FIN = DAG.getFrameIndex(Loc.first.Loc, MVT::i32);
|
|
ArgValue = DAG.getLoad(Op.Val->getValueType(i), DAG.getEntryNode(), FIN,
|
|
DAG.getSrcValue(NULL));
|
|
} else {
|
|
// Must be a CopyFromReg
|
|
ArgValue= DAG.getCopyFromReg(DAG.getEntryNode(), Loc.first.Loc,
|
|
Loc.first.Typ);
|
|
}
|
|
|
|
if (Loc.second.Kind != FALocInfo::None) {
|
|
SDOperand ArgValue2;
|
|
if (Loc.second.Kind == FALocInfo::StackFrameLoc) {
|
|
// Create the SelectionDAG nodes corresponding to a load from this
|
|
// parameter.
|
|
SDOperand FIN = DAG.getFrameIndex(Loc.second.Loc, MVT::i32);
|
|
ArgValue2 = DAG.getLoad(Op.Val->getValueType(i), DAG.getEntryNode(),
|
|
FIN, DAG.getSrcValue(NULL));
|
|
} else {
|
|
// Must be a CopyFromReg
|
|
ArgValue2 = DAG.getCopyFromReg(DAG.getEntryNode(),
|
|
Loc.second.Loc, Loc.second.Typ);
|
|
}
|
|
ArgValue = DAG.getNode(ISD::BUILD_PAIR, VT, ArgValue, ArgValue2);
|
|
}
|
|
FormalArgs.push_back(ArgValue);
|
|
}
|
|
|
|
// Provide a chain. Note that this isn't the right one, but it works as well
|
|
// as before.
|
|
FormalArgs.push_back(DAG.getEntryNode());
|
|
}
|
|
|
|
std::pair<SDOperand, SDOperand>
|
|
X86TargetLowering::LowerFastCCCallTo(SDOperand Chain, const Type *RetTy,
|
|
bool isTailCall, SDOperand Callee,
|
|
ArgListTy &Args, SelectionDAG &DAG) {
|
|
// Count how many bytes are to be pushed on the stack.
|
|
unsigned NumBytes = 0;
|
|
|
|
// Keep track of the number of integer regs passed so far. This can be either
|
|
// 0 (neither EAX or EDX used), 1 (EAX is used) or 2 (EAX and EDX are both
|
|
// used).
|
|
unsigned NumIntRegs = 0;
|
|
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i)
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unknown value type!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
// fall through
|
|
case MVT::f32:
|
|
NumBytes += 4;
|
|
break;
|
|
case MVT::i64:
|
|
if (NumIntRegs+2 <= FASTCC_NUM_INT_ARGS_INREGS) {
|
|
NumIntRegs += 2;
|
|
break;
|
|
} else if (NumIntRegs+1 <= FASTCC_NUM_INT_ARGS_INREGS) {
|
|
NumIntRegs = FASTCC_NUM_INT_ARGS_INREGS;
|
|
NumBytes += 4;
|
|
break;
|
|
}
|
|
|
|
// fall through
|
|
case MVT::f64:
|
|
NumBytes += 8;
|
|
break;
|
|
}
|
|
|
|
// Make sure the instruction takes 8n+4 bytes to make sure the start of the
|
|
// arguments and the arguments after the retaddr has been pushed are aligned.
|
|
if ((NumBytes & 7) == 0)
|
|
NumBytes += 4;
|
|
|
|
Chain = DAG.getCALLSEQ_START(Chain,DAG.getConstant(NumBytes, getPointerTy()));
|
|
|
|
// Arguments go on the stack in reverse order, as specified by the ABI.
|
|
unsigned ArgOffset = 0;
|
|
SDOperand StackPtr = DAG.getRegister(X86::ESP, MVT::i32);
|
|
NumIntRegs = 0;
|
|
std::vector<SDOperand> Stores;
|
|
std::vector<SDOperand> RegValuesToPass;
|
|
for (unsigned i = 0, e = Args.size(); i != e; ++i) {
|
|
switch (getValueType(Args[i].second)) {
|
|
default: assert(0 && "Unexpected ValueType for argument!");
|
|
case MVT::i1:
|
|
Args[i].first = DAG.getNode(ISD::ANY_EXTEND, MVT::i8, Args[i].first);
|
|
// Fall through.
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
case MVT::i32:
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
|
|
RegValuesToPass.push_back(Args[i].first);
|
|
++NumIntRegs;
|
|
break;
|
|
}
|
|
// Fall through
|
|
case MVT::f32: {
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 4;
|
|
break;
|
|
}
|
|
case MVT::i64:
|
|
// Can pass (at least) part of it in regs?
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
|
|
SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32,
|
|
Args[i].first, DAG.getConstant(1, MVT::i32));
|
|
SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32,
|
|
Args[i].first, DAG.getConstant(0, MVT::i32));
|
|
RegValuesToPass.push_back(Lo);
|
|
++NumIntRegs;
|
|
|
|
// Pass both parts in regs?
|
|
if (NumIntRegs < FASTCC_NUM_INT_ARGS_INREGS) {
|
|
RegValuesToPass.push_back(Hi);
|
|
++NumIntRegs;
|
|
} else {
|
|
// Pass the high part in memory.
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Hi, PtrOff, DAG.getSrcValue(NULL)));
|
|
ArgOffset += 4;
|
|
}
|
|
break;
|
|
}
|
|
// Fall through
|
|
case MVT::f64:
|
|
SDOperand PtrOff = DAG.getConstant(ArgOffset, getPointerTy());
|
|
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
|
|
Stores.push_back(DAG.getNode(ISD::STORE, MVT::Other, Chain,
|
|
Args[i].first, PtrOff,
|
|
DAG.getSrcValue(NULL)));
|
|
ArgOffset += 8;
|
|
break;
|
|
}
|
|
}
|
|
if (!Stores.empty())
|
|
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other, Stores);
|
|
|
|
// Make sure the instruction takes 8n+4 bytes to make sure the start of the
|
|
// arguments and the arguments after the retaddr has been pushed are aligned.
|
|
if ((ArgOffset & 7) == 0)
|
|
ArgOffset += 4;
|
|
|
|
std::vector<MVT::ValueType> RetVals;
|
|
MVT::ValueType RetTyVT = getValueType(RetTy);
|
|
|
|
RetVals.push_back(MVT::Other);
|
|
|
|
// The result values produced have to be legal. Promote the result.
|
|
switch (RetTyVT) {
|
|
case MVT::isVoid: break;
|
|
default:
|
|
RetVals.push_back(RetTyVT);
|
|
break;
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
case MVT::i16:
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
case MVT::f32:
|
|
if (X86ScalarSSE)
|
|
RetVals.push_back(MVT::f32);
|
|
else
|
|
RetVals.push_back(MVT::f64);
|
|
break;
|
|
case MVT::i64:
|
|
RetVals.push_back(MVT::i32);
|
|
RetVals.push_back(MVT::i32);
|
|
break;
|
|
}
|
|
|
|
// Build a sequence of copy-to-reg nodes chained together with token chain
|
|
// and flag operands which copy the outgoing args into registers.
|
|
SDOperand InFlag;
|
|
for (unsigned i = 0, e = RegValuesToPass.size(); i != e; ++i) {
|
|
unsigned CCReg;
|
|
SDOperand RegToPass = RegValuesToPass[i];
|
|
switch (RegToPass.getValueType()) {
|
|
default: assert(0 && "Bad thing to pass in regs");
|
|
case MVT::i8:
|
|
CCReg = (i == 0) ? X86::AL : X86::DL;
|
|
break;
|
|
case MVT::i16:
|
|
CCReg = (i == 0) ? X86::AX : X86::DX;
|
|
break;
|
|
case MVT::i32:
|
|
CCReg = (i == 0) ? X86::EAX : X86::EDX;
|
|
break;
|
|
}
|
|
|
|
Chain = DAG.getCopyToReg(Chain, CCReg, RegToPass, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
std::vector<MVT::ValueType> NodeTys;
|
|
NodeTys.push_back(MVT::Other); // Returns a chain
|
|
NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Callee);
|
|
if (InFlag.Val)
|
|
Ops.push_back(InFlag);
|
|
|
|
// FIXME: Do not generate X86ISD::TAILCALL for now.
|
|
Chain = DAG.getNode(isTailCall ? X86ISD::TAILCALL : X86ISD::CALL,
|
|
NodeTys, Ops);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
NodeTys.clear();
|
|
NodeTys.push_back(MVT::Other); // Returns a chain
|
|
NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getConstant(ArgOffset, getPointerTy()));
|
|
Ops.push_back(DAG.getConstant(ArgOffset, getPointerTy()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(ISD::CALLSEQ_END, NodeTys, Ops);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
SDOperand RetVal;
|
|
if (RetTyVT != MVT::isVoid) {
|
|
switch (RetTyVT) {
|
|
default: assert(0 && "Unknown value type to return!");
|
|
case MVT::i1:
|
|
case MVT::i8:
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::AL, MVT::i8, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
if (RetTyVT == MVT::i1)
|
|
RetVal = DAG.getNode(ISD::TRUNCATE, MVT::i1, RetVal);
|
|
break;
|
|
case MVT::i16:
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::AX, MVT::i16, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
break;
|
|
case MVT::i32:
|
|
RetVal = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
|
|
Chain = RetVal.getValue(1);
|
|
break;
|
|
case MVT::i64: {
|
|
SDOperand Lo = DAG.getCopyFromReg(Chain, X86::EAX, MVT::i32, InFlag);
|
|
SDOperand Hi = DAG.getCopyFromReg(Lo.getValue(1), X86::EDX, MVT::i32,
|
|
Lo.getValue(2));
|
|
RetVal = DAG.getNode(ISD::BUILD_PAIR, MVT::i64, Lo, Hi);
|
|
Chain = Hi.getValue(1);
|
|
break;
|
|
}
|
|
case MVT::f32:
|
|
case MVT::f64: {
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::f64);
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(InFlag);
|
|
RetVal = DAG.getNode(X86ISD::FP_GET_RESULT, Tys, Ops);
|
|
Chain = RetVal.getValue(1);
|
|
InFlag = RetVal.getValue(2);
|
|
if (X86ScalarSSE) {
|
|
// FIXME: Currently the FST is flagged to the FP_GET_RESULT. This
|
|
// shouldn't be necessary except that RFP cannot be live across
|
|
// multiple blocks. When stackifier is fixed, they can be uncoupled.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
Tys.clear();
|
|
Tys.push_back(MVT::Other);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(RetVal);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(RetTyVT));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::FST, Tys, Ops);
|
|
RetVal = DAG.getLoad(RetTyVT, Chain, StackSlot,
|
|
DAG.getSrcValue(NULL));
|
|
Chain = RetVal.getValue(1);
|
|
}
|
|
|
|
if (RetTyVT == MVT::f32 && !X86ScalarSSE)
|
|
// FIXME: we would really like to remember that this FP_ROUND
|
|
// operation is okay to eliminate if we allow excess FP precision.
|
|
RetVal = DAG.getNode(ISD::FP_ROUND, MVT::f32, RetVal);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return std::make_pair(RetVal, Chain);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::getReturnAddressFrameIndex(SelectionDAG &DAG) {
|
|
if (ReturnAddrIndex == 0) {
|
|
// Set up a frame object for the return address.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
ReturnAddrIndex = MF.getFrameInfo()->CreateFixedObject(4, -4);
|
|
}
|
|
|
|
return DAG.getFrameIndex(ReturnAddrIndex, MVT::i32);
|
|
}
|
|
|
|
|
|
|
|
std::pair<SDOperand, SDOperand> X86TargetLowering::
|
|
LowerFrameReturnAddress(bool isFrameAddress, SDOperand Chain, unsigned Depth,
|
|
SelectionDAG &DAG) {
|
|
SDOperand Result;
|
|
if (Depth) // Depths > 0 not supported yet!
|
|
Result = DAG.getConstant(0, getPointerTy());
|
|
else {
|
|
SDOperand RetAddrFI = getReturnAddressFrameIndex(DAG);
|
|
if (!isFrameAddress)
|
|
// Just load the return address
|
|
Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(), RetAddrFI,
|
|
DAG.getSrcValue(NULL));
|
|
else
|
|
Result = DAG.getNode(ISD::SUB, MVT::i32, RetAddrFI,
|
|
DAG.getConstant(4, MVT::i32));
|
|
}
|
|
return std::make_pair(Result, Chain);
|
|
}
|
|
|
|
/// getCondBrOpcodeForX86CC - Returns the X86 conditional branch opcode
|
|
/// which corresponds to the condition code.
|
|
static unsigned getCondBrOpcodeForX86CC(unsigned X86CC) {
|
|
switch (X86CC) {
|
|
default: assert(0 && "Unknown X86 conditional code!");
|
|
case X86ISD::COND_A: return X86::JA;
|
|
case X86ISD::COND_AE: return X86::JAE;
|
|
case X86ISD::COND_B: return X86::JB;
|
|
case X86ISD::COND_BE: return X86::JBE;
|
|
case X86ISD::COND_E: return X86::JE;
|
|
case X86ISD::COND_G: return X86::JG;
|
|
case X86ISD::COND_GE: return X86::JGE;
|
|
case X86ISD::COND_L: return X86::JL;
|
|
case X86ISD::COND_LE: return X86::JLE;
|
|
case X86ISD::COND_NE: return X86::JNE;
|
|
case X86ISD::COND_NO: return X86::JNO;
|
|
case X86ISD::COND_NP: return X86::JNP;
|
|
case X86ISD::COND_NS: return X86::JNS;
|
|
case X86ISD::COND_O: return X86::JO;
|
|
case X86ISD::COND_P: return X86::JP;
|
|
case X86ISD::COND_S: return X86::JS;
|
|
}
|
|
}
|
|
|
|
/// translateX86CC - do a one to one translation of a ISD::CondCode to the X86
|
|
/// specific condition code. It returns a false if it cannot do a direct
|
|
/// translation. X86CC is the translated CondCode. Flip is set to true if the
|
|
/// the order of comparison operands should be flipped.
|
|
static bool translateX86CC(ISD::CondCode SetCCOpcode, bool isFP,
|
|
unsigned &X86CC, bool &Flip) {
|
|
Flip = false;
|
|
X86CC = X86ISD::COND_INVALID;
|
|
if (!isFP) {
|
|
switch (SetCCOpcode) {
|
|
default: break;
|
|
case ISD::SETEQ: X86CC = X86ISD::COND_E; break;
|
|
case ISD::SETGT: X86CC = X86ISD::COND_G; break;
|
|
case ISD::SETGE: X86CC = X86ISD::COND_GE; break;
|
|
case ISD::SETLT: X86CC = X86ISD::COND_L; break;
|
|
case ISD::SETLE: X86CC = X86ISD::COND_LE; break;
|
|
case ISD::SETNE: X86CC = X86ISD::COND_NE; break;
|
|
case ISD::SETULT: X86CC = X86ISD::COND_B; break;
|
|
case ISD::SETUGT: X86CC = X86ISD::COND_A; break;
|
|
case ISD::SETULE: X86CC = X86ISD::COND_BE; break;
|
|
case ISD::SETUGE: X86CC = X86ISD::COND_AE; break;
|
|
}
|
|
} else {
|
|
// On a floating point condition, the flags are set as follows:
|
|
// ZF PF CF op
|
|
// 0 | 0 | 0 | X > Y
|
|
// 0 | 0 | 1 | X < Y
|
|
// 1 | 0 | 0 | X == Y
|
|
// 1 | 1 | 1 | unordered
|
|
switch (SetCCOpcode) {
|
|
default: break;
|
|
case ISD::SETUEQ:
|
|
case ISD::SETEQ: X86CC = X86ISD::COND_E; break;
|
|
case ISD::SETOLT: Flip = true; // Fallthrough
|
|
case ISD::SETOGT:
|
|
case ISD::SETGT: X86CC = X86ISD::COND_A; break;
|
|
case ISD::SETOLE: Flip = true; // Fallthrough
|
|
case ISD::SETOGE:
|
|
case ISD::SETGE: X86CC = X86ISD::COND_AE; break;
|
|
case ISD::SETUGT: Flip = true; // Fallthrough
|
|
case ISD::SETULT:
|
|
case ISD::SETLT: X86CC = X86ISD::COND_B; break;
|
|
case ISD::SETUGE: Flip = true; // Fallthrough
|
|
case ISD::SETULE:
|
|
case ISD::SETLE: X86CC = X86ISD::COND_BE; break;
|
|
case ISD::SETONE:
|
|
case ISD::SETNE: X86CC = X86ISD::COND_NE; break;
|
|
case ISD::SETUO: X86CC = X86ISD::COND_P; break;
|
|
case ISD::SETO: X86CC = X86ISD::COND_NP; break;
|
|
}
|
|
}
|
|
|
|
return X86CC != X86ISD::COND_INVALID;
|
|
}
|
|
|
|
static bool translateX86CC(SDOperand CC, bool isFP, unsigned &X86CC,
|
|
bool &Flip) {
|
|
return translateX86CC(cast<CondCodeSDNode>(CC)->get(), isFP, X86CC, Flip);
|
|
}
|
|
|
|
/// hasFPCMov - is there a floating point cmov for the specific X86 condition
|
|
/// code. Current x86 isa includes the following FP cmov instructions:
|
|
/// fcmovb, fcomvbe, fcomve, fcmovu, fcmovae, fcmova, fcmovne, fcmovnu.
|
|
static bool hasFPCMov(unsigned X86CC) {
|
|
switch (X86CC) {
|
|
default:
|
|
return false;
|
|
case X86ISD::COND_B:
|
|
case X86ISD::COND_BE:
|
|
case X86ISD::COND_E:
|
|
case X86ISD::COND_P:
|
|
case X86ISD::COND_A:
|
|
case X86ISD::COND_AE:
|
|
case X86ISD::COND_NE:
|
|
case X86ISD::COND_NP:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
MachineBasicBlock *
|
|
X86TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI,
|
|
MachineBasicBlock *BB) {
|
|
switch (MI->getOpcode()) {
|
|
default: assert(false && "Unexpected instr type to insert");
|
|
case X86::CMOV_FR32:
|
|
case X86::CMOV_FR64:
|
|
case X86::CMOV_V4F32:
|
|
case X86::CMOV_V2F64:
|
|
case X86::CMOV_V2I64: {
|
|
// To "insert" a SELECT_CC instruction, we actually have to insert the
|
|
// diamond control-flow pattern. The incoming instruction knows the
|
|
// destination vreg to set, the condition code register to branch on, the
|
|
// true/false values to select between, and a branch opcode to use.
|
|
const BasicBlock *LLVM_BB = BB->getBasicBlock();
|
|
ilist<MachineBasicBlock>::iterator It = BB;
|
|
++It;
|
|
|
|
// thisMBB:
|
|
// ...
|
|
// TrueVal = ...
|
|
// cmpTY ccX, r1, r2
|
|
// bCC copy1MBB
|
|
// fallthrough --> copy0MBB
|
|
MachineBasicBlock *thisMBB = BB;
|
|
MachineBasicBlock *copy0MBB = new MachineBasicBlock(LLVM_BB);
|
|
MachineBasicBlock *sinkMBB = new MachineBasicBlock(LLVM_BB);
|
|
unsigned Opc = getCondBrOpcodeForX86CC(MI->getOperand(3).getImmedValue());
|
|
BuildMI(BB, Opc, 1).addMBB(sinkMBB);
|
|
MachineFunction *F = BB->getParent();
|
|
F->getBasicBlockList().insert(It, copy0MBB);
|
|
F->getBasicBlockList().insert(It, sinkMBB);
|
|
// Update machine-CFG edges by first adding all successors of the current
|
|
// block to the new block which will contain the Phi node for the select.
|
|
for(MachineBasicBlock::succ_iterator i = BB->succ_begin(),
|
|
e = BB->succ_end(); i != e; ++i)
|
|
sinkMBB->addSuccessor(*i);
|
|
// Next, remove all successors of the current block, and add the true
|
|
// and fallthrough blocks as its successors.
|
|
while(!BB->succ_empty())
|
|
BB->removeSuccessor(BB->succ_begin());
|
|
BB->addSuccessor(copy0MBB);
|
|
BB->addSuccessor(sinkMBB);
|
|
|
|
// copy0MBB:
|
|
// %FalseValue = ...
|
|
// # fallthrough to sinkMBB
|
|
BB = copy0MBB;
|
|
|
|
// Update machine-CFG edges
|
|
BB->addSuccessor(sinkMBB);
|
|
|
|
// sinkMBB:
|
|
// %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
|
|
// ...
|
|
BB = sinkMBB;
|
|
BuildMI(BB, X86::PHI, 4, MI->getOperand(0).getReg())
|
|
.addReg(MI->getOperand(1).getReg()).addMBB(copy0MBB)
|
|
.addReg(MI->getOperand(2).getReg()).addMBB(thisMBB);
|
|
|
|
delete MI; // The pseudo instruction is gone now.
|
|
return BB;
|
|
}
|
|
|
|
case X86::FP_TO_INT16_IN_MEM:
|
|
case X86::FP_TO_INT32_IN_MEM:
|
|
case X86::FP_TO_INT64_IN_MEM: {
|
|
// Change the floating point control register to use "round towards zero"
|
|
// mode when truncating to an integer value.
|
|
MachineFunction *F = BB->getParent();
|
|
int CWFrameIdx = F->getFrameInfo()->CreateStackObject(2, 2);
|
|
addFrameReference(BuildMI(BB, X86::FNSTCW16m, 4), CWFrameIdx);
|
|
|
|
// Load the old value of the high byte of the control word...
|
|
unsigned OldCW =
|
|
F->getSSARegMap()->createVirtualRegister(X86::GR16RegisterClass);
|
|
addFrameReference(BuildMI(BB, X86::MOV16rm, 4, OldCW), CWFrameIdx);
|
|
|
|
// Set the high part to be round to zero...
|
|
addFrameReference(BuildMI(BB, X86::MOV16mi, 5), CWFrameIdx).addImm(0xC7F);
|
|
|
|
// Reload the modified control word now...
|
|
addFrameReference(BuildMI(BB, X86::FLDCW16m, 4), CWFrameIdx);
|
|
|
|
// Restore the memory image of control word to original value
|
|
addFrameReference(BuildMI(BB, X86::MOV16mr, 5), CWFrameIdx).addReg(OldCW);
|
|
|
|
// Get the X86 opcode to use.
|
|
unsigned Opc;
|
|
switch (MI->getOpcode()) {
|
|
default: assert(0 && "illegal opcode!");
|
|
case X86::FP_TO_INT16_IN_MEM: Opc = X86::FpIST16m; break;
|
|
case X86::FP_TO_INT32_IN_MEM: Opc = X86::FpIST32m; break;
|
|
case X86::FP_TO_INT64_IN_MEM: Opc = X86::FpIST64m; break;
|
|
}
|
|
|
|
X86AddressMode AM;
|
|
MachineOperand &Op = MI->getOperand(0);
|
|
if (Op.isRegister()) {
|
|
AM.BaseType = X86AddressMode::RegBase;
|
|
AM.Base.Reg = Op.getReg();
|
|
} else {
|
|
AM.BaseType = X86AddressMode::FrameIndexBase;
|
|
AM.Base.FrameIndex = Op.getFrameIndex();
|
|
}
|
|
Op = MI->getOperand(1);
|
|
if (Op.isImmediate())
|
|
AM.Scale = Op.getImmedValue();
|
|
Op = MI->getOperand(2);
|
|
if (Op.isImmediate())
|
|
AM.IndexReg = Op.getImmedValue();
|
|
Op = MI->getOperand(3);
|
|
if (Op.isGlobalAddress()) {
|
|
AM.GV = Op.getGlobal();
|
|
} else {
|
|
AM.Disp = Op.getImmedValue();
|
|
}
|
|
addFullAddress(BuildMI(BB, Opc, 5), AM).addReg(MI->getOperand(4).getReg());
|
|
|
|
// Reload the original control word now.
|
|
addFrameReference(BuildMI(BB, X86::FLDCW16m, 4), CWFrameIdx);
|
|
|
|
delete MI; // The pseudo instruction is gone now.
|
|
return BB;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// X86 Custom Lowering Hooks
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// DarwinGVRequiresExtraLoad - true if accessing the GV requires an extra
|
|
/// load. For Darwin, external and weak symbols are indirect, loading the value
|
|
/// at address GV rather then the value of GV itself. This means that the
|
|
/// GlobalAddress must be in the base or index register of the address, not the
|
|
/// GV offset field.
|
|
static bool DarwinGVRequiresExtraLoad(GlobalValue *GV) {
|
|
return (GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
|
|
(GV->isExternal() && !GV->hasNotBeenReadFromBytecode()));
|
|
}
|
|
|
|
/// isUndefOrInRange - Op is either an undef node or a ConstantSDNode. Return
|
|
/// true if Op is undef or if its value falls within the specified range (L, H].
|
|
static bool isUndefOrInRange(SDOperand Op, unsigned Low, unsigned Hi) {
|
|
if (Op.getOpcode() == ISD::UNDEF)
|
|
return true;
|
|
|
|
unsigned Val = cast<ConstantSDNode>(Op)->getValue();
|
|
return (Val >= Low && Val < Hi);
|
|
}
|
|
|
|
/// isUndefOrEqual - Op is either an undef node or a ConstantSDNode. Return
|
|
/// true if Op is undef or if its value equal to the specified value.
|
|
static bool isUndefOrEqual(SDOperand Op, unsigned Val) {
|
|
if (Op.getOpcode() == ISD::UNDEF)
|
|
return true;
|
|
return cast<ConstantSDNode>(Op)->getValue() == Val;
|
|
}
|
|
|
|
/// isPSHUFDMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to PSHUFD.
|
|
bool X86::isPSHUFDMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Check if the value doesn't reference the second vector.
|
|
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
if (cast<ConstantSDNode>(Arg)->getValue() >= 4)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isPSHUFHWMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to PSHUFHW.
|
|
bool X86::isPSHUFHWMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 8)
|
|
return false;
|
|
|
|
// Lower quadword copied in order.
|
|
for (unsigned i = 0; i != 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
if (cast<ConstantSDNode>(Arg)->getValue() != i)
|
|
return false;
|
|
}
|
|
|
|
// Upper quadword shuffled.
|
|
for (unsigned i = 4; i != 8; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < 4 || Val > 7)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isPSHUFLWMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to PSHUFLW.
|
|
bool X86::isPSHUFLWMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 8)
|
|
return false;
|
|
|
|
// Upper quadword copied in order.
|
|
for (unsigned i = 4; i != 8; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i))
|
|
return false;
|
|
|
|
// Lower quadword shuffled.
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
if (!isUndefOrInRange(N->getOperand(i), 0, 4))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isSHUFPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to SHUFP*.
|
|
static bool isSHUFPMask(std::vector<SDOperand> &N) {
|
|
unsigned NumElems = N.size();
|
|
if (NumElems != 2 && NumElems != 4) return false;
|
|
|
|
unsigned Half = NumElems / 2;
|
|
for (unsigned i = 0; i < Half; ++i)
|
|
if (!isUndefOrInRange(N[i], 0, NumElems))
|
|
return false;
|
|
for (unsigned i = Half; i < NumElems; ++i)
|
|
if (!isUndefOrInRange(N[i], NumElems, NumElems*2))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isSHUFPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
|
|
return ::isSHUFPMask(Ops);
|
|
}
|
|
|
|
/// isCommutedSHUFP - Returns true if the shuffle mask is except
|
|
/// the reverse of what x86 shuffles want. x86 shuffles requires the lower
|
|
/// half elements to come from vector 1 (which would equal the dest.) and
|
|
/// the upper half to come from vector 2.
|
|
static bool isCommutedSHUFP(std::vector<SDOperand> &Ops) {
|
|
unsigned NumElems = Ops.size();
|
|
if (NumElems != 2 && NumElems != 4) return false;
|
|
|
|
unsigned Half = NumElems / 2;
|
|
for (unsigned i = 0; i < Half; ++i)
|
|
if (!isUndefOrInRange(Ops[i], NumElems, NumElems*2))
|
|
return false;
|
|
for (unsigned i = Half; i < NumElems; ++i)
|
|
if (!isUndefOrInRange(Ops[i], 0, NumElems))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
static bool isCommutedSHUFP(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
|
|
return isCommutedSHUFP(Ops);
|
|
}
|
|
|
|
/// isMOVHLPSMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVHLPS.
|
|
bool X86::isMOVHLPSMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect bit0 == 6, bit1 == 7, bit2 == 2, bit3 == 3
|
|
return isUndefOrEqual(N->getOperand(0), 6) &&
|
|
isUndefOrEqual(N->getOperand(1), 7) &&
|
|
isUndefOrEqual(N->getOperand(2), 2) &&
|
|
isUndefOrEqual(N->getOperand(3), 3);
|
|
}
|
|
|
|
/// isMOVLPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVLP{S|D}.
|
|
bool X86::isMOVLPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4)
|
|
return false;
|
|
|
|
for (unsigned i = 0; i < NumElems/2; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i + NumElems))
|
|
return false;
|
|
|
|
for (unsigned i = NumElems/2; i < NumElems; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isMOVHPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVHP{S|D}
|
|
/// and MOVLHPS.
|
|
bool X86::isMOVHPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4)
|
|
return false;
|
|
|
|
for (unsigned i = 0; i < NumElems/2; ++i)
|
|
if (!isUndefOrEqual(N->getOperand(i), i))
|
|
return false;
|
|
|
|
for (unsigned i = 0; i < NumElems/2; ++i) {
|
|
SDOperand Arg = N->getOperand(i + NumElems/2);
|
|
if (!isUndefOrEqual(Arg, i + NumElems))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isUNPCKLMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to UNPCKL.
|
|
bool static isUNPCKLMask(std::vector<SDOperand> &N, bool V2IsSplat = false) {
|
|
unsigned NumElems = N.size();
|
|
if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
|
|
SDOperand BitI = N[i];
|
|
SDOperand BitI1 = N[i+1];
|
|
if (!isUndefOrEqual(BitI, j))
|
|
return false;
|
|
if (V2IsSplat) {
|
|
if (isUndefOrEqual(BitI1, NumElems))
|
|
return false;
|
|
} else {
|
|
if (!isUndefOrEqual(BitI1, j + NumElems))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isUNPCKLMask(SDNode *N, bool V2IsSplat) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
|
|
return ::isUNPCKLMask(Ops, V2IsSplat);
|
|
}
|
|
|
|
/// isUNPCKHMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to UNPCKH.
|
|
bool static isUNPCKHMask(std::vector<SDOperand> &N, bool V2IsSplat = false) {
|
|
unsigned NumElems = N.size();
|
|
if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
|
|
SDOperand BitI = N[i];
|
|
SDOperand BitI1 = N[i+1];
|
|
if (!isUndefOrEqual(BitI, j + NumElems/2))
|
|
return false;
|
|
if (V2IsSplat) {
|
|
if (isUndefOrEqual(BitI1, NumElems))
|
|
return false;
|
|
} else {
|
|
if (!isUndefOrEqual(BitI1, j + NumElems/2 + NumElems))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isUNPCKHMask(SDNode *N, bool V2IsSplat) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
|
|
return ::isUNPCKHMask(Ops, V2IsSplat);
|
|
}
|
|
|
|
/// isUNPCKL_v_undef_Mask - Special case of isUNPCKLMask for canonical form
|
|
/// of vector_shuffle v, v, <0, 4, 1, 5>, i.e. vector_shuffle v, undef,
|
|
/// <0, 0, 1, 1>
|
|
bool X86::isUNPCKL_v_undef_Mask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
unsigned NumElems = N->getNumOperands();
|
|
if (NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
for (unsigned i = 0, j = 0; i != NumElems; i += 2, ++j) {
|
|
SDOperand BitI = N->getOperand(i);
|
|
SDOperand BitI1 = N->getOperand(i+1);
|
|
|
|
if (!isUndefOrEqual(BitI, j))
|
|
return false;
|
|
if (!isUndefOrEqual(BitI1, j))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// isMOVLMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVSS,
|
|
/// MOVSD, and MOVD, i.e. setting the lowest element.
|
|
static bool isMOVLMask(std::vector<SDOperand> &N) {
|
|
unsigned NumElems = N.size();
|
|
if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
if (!isUndefOrEqual(N[0], NumElems))
|
|
return false;
|
|
|
|
for (unsigned i = 1; i < NumElems; ++i) {
|
|
SDOperand Arg = N[i];
|
|
if (!isUndefOrEqual(Arg, i))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool X86::isMOVLMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
|
|
return ::isMOVLMask(Ops);
|
|
}
|
|
|
|
/// isCommutedMOVL - Returns true if the shuffle mask is except the reverse
|
|
/// of what x86 movss want. X86 movs requires the lowest element to be lowest
|
|
/// element of vector 2 and the other elements to come from vector 1 in order.
|
|
static bool isCommutedMOVL(std::vector<SDOperand> &Ops, bool V2IsSplat = false) {
|
|
unsigned NumElems = Ops.size();
|
|
if (NumElems != 2 && NumElems != 4 && NumElems != 8 && NumElems != 16)
|
|
return false;
|
|
|
|
if (!isUndefOrEqual(Ops[0], 0))
|
|
return false;
|
|
|
|
for (unsigned i = 1; i < NumElems; ++i) {
|
|
SDOperand Arg = Ops[i];
|
|
if (V2IsSplat) {
|
|
if (!isUndefOrEqual(Arg, NumElems))
|
|
return false;
|
|
} else {
|
|
if (!isUndefOrEqual(Arg, i+NumElems))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool isCommutedMOVL(SDNode *N, bool V2IsSplat = false) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
std::vector<SDOperand> Ops(N->op_begin(), N->op_end());
|
|
return isCommutedMOVL(Ops, V2IsSplat);
|
|
}
|
|
|
|
/// isMOVSHDUPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVSHDUP.
|
|
bool X86::isMOVSHDUPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect 1, 1, 3, 3
|
|
for (unsigned i = 0; i < 2; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 1) return false;
|
|
}
|
|
|
|
bool HasHi = false;
|
|
for (unsigned i = 2; i < 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 3) return false;
|
|
HasHi = true;
|
|
}
|
|
|
|
// Don't use movshdup if it can be done with a shufps.
|
|
return HasHi;
|
|
}
|
|
|
|
/// isMOVSLDUPMask - Return true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a shuffle of elements that is suitable for input to MOVSLDUP.
|
|
bool X86::isMOVSLDUPMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 4)
|
|
return false;
|
|
|
|
// Expect 0, 0, 2, 2
|
|
for (unsigned i = 0; i < 2; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 0) return false;
|
|
}
|
|
|
|
bool HasHi = false;
|
|
for (unsigned i = 2; i < 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val != 2) return false;
|
|
HasHi = true;
|
|
}
|
|
|
|
// Don't use movshdup if it can be done with a shufps.
|
|
return HasHi;
|
|
}
|
|
|
|
/// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
|
|
/// a splat of a single element.
|
|
static bool isSplatMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
// This is a splat operation if each element of the permute is the same, and
|
|
// if the value doesn't reference the second vector.
|
|
unsigned NumElems = N->getNumOperands();
|
|
SDOperand ElementBase;
|
|
unsigned i = 0;
|
|
for (; i != NumElems; ++i) {
|
|
SDOperand Elt = N->getOperand(i);
|
|
if (ConstantSDNode *EltV = dyn_cast<ConstantSDNode>(Elt)) {
|
|
ElementBase = Elt;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!ElementBase.Val)
|
|
return false;
|
|
|
|
for (; i != NumElems; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
if (Arg != ElementBase) return false;
|
|
}
|
|
|
|
// Make sure it is a splat of the first vector operand.
|
|
return cast<ConstantSDNode>(ElementBase)->getValue() < NumElems;
|
|
}
|
|
|
|
/// isSplatMask - Return true if the specified VECTOR_SHUFFLE operand specifies
|
|
/// a splat of a single element and it's a 2 or 4 element mask.
|
|
bool X86::isSplatMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
// We can only splat 64-bit, and 32-bit quantities with a single instruction.
|
|
if (N->getNumOperands() != 4 && N->getNumOperands() != 2)
|
|
return false;
|
|
return ::isSplatMask(N);
|
|
}
|
|
|
|
/// getShuffleSHUFImmediate - Return the appropriate immediate to shuffle
|
|
/// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUF* and SHUFP*
|
|
/// instructions.
|
|
unsigned X86::getShuffleSHUFImmediate(SDNode *N) {
|
|
unsigned NumOperands = N->getNumOperands();
|
|
unsigned Shift = (NumOperands == 4) ? 2 : 1;
|
|
unsigned Mask = 0;
|
|
for (unsigned i = 0; i < NumOperands; ++i) {
|
|
unsigned Val = 0;
|
|
SDOperand Arg = N->getOperand(NumOperands-i-1);
|
|
if (Arg.getOpcode() != ISD::UNDEF)
|
|
Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val >= NumOperands) Val -= NumOperands;
|
|
Mask |= Val;
|
|
if (i != NumOperands - 1)
|
|
Mask <<= Shift;
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
/// getShufflePSHUFHWImmediate - Return the appropriate immediate to shuffle
|
|
/// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFHW
|
|
/// instructions.
|
|
unsigned X86::getShufflePSHUFHWImmediate(SDNode *N) {
|
|
unsigned Mask = 0;
|
|
// 8 nodes, but we only care about the last 4.
|
|
for (unsigned i = 7; i >= 4; --i) {
|
|
unsigned Val = 0;
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF)
|
|
Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
Mask |= (Val - 4);
|
|
if (i != 4)
|
|
Mask <<= 2;
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
/// getShufflePSHUFLWImmediate - Return the appropriate immediate to shuffle
|
|
/// the specified isShuffleMask VECTOR_SHUFFLE mask with PSHUFLW
|
|
/// instructions.
|
|
unsigned X86::getShufflePSHUFLWImmediate(SDNode *N) {
|
|
unsigned Mask = 0;
|
|
// 8 nodes, but we only care about the first 4.
|
|
for (int i = 3; i >= 0; --i) {
|
|
unsigned Val = 0;
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF)
|
|
Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
Mask |= Val;
|
|
if (i != 0)
|
|
Mask <<= 2;
|
|
}
|
|
|
|
return Mask;
|
|
}
|
|
|
|
/// isPSHUFHW_PSHUFLWMask - true if the specified VECTOR_SHUFFLE operand
|
|
/// specifies a 8 element shuffle that can be broken into a pair of
|
|
/// PSHUFHW and PSHUFLW.
|
|
static bool isPSHUFHW_PSHUFLWMask(SDNode *N) {
|
|
assert(N->getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
if (N->getNumOperands() != 8)
|
|
return false;
|
|
|
|
// Lower quadword shuffled.
|
|
for (unsigned i = 0; i != 4; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val > 4)
|
|
return false;
|
|
}
|
|
|
|
// Upper quadword shuffled.
|
|
for (unsigned i = 4; i != 8; ++i) {
|
|
SDOperand Arg = N->getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) continue;
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < 4 || Val > 7)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/// CommuteVectorShuffle - Swap vector_shuffle operandsas well as
|
|
/// values in ther permute mask.
|
|
static SDOperand CommuteVectorShuffle(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand V1 = Op.getOperand(0);
|
|
SDOperand V2 = Op.getOperand(1);
|
|
SDOperand Mask = Op.getOperand(2);
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType MaskVT = Mask.getValueType();
|
|
MVT::ValueType EltVT = MVT::getVectorBaseType(MaskVT);
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
std::vector<SDOperand> MaskVec;
|
|
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Arg = Mask.getOperand(i);
|
|
if (Arg.getOpcode() == ISD::UNDEF) {
|
|
MaskVec.push_back(DAG.getNode(ISD::UNDEF, EltVT));
|
|
continue;
|
|
}
|
|
assert(isa<ConstantSDNode>(Arg) && "Invalid VECTOR_SHUFFLE mask!");
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val < NumElems)
|
|
MaskVec.push_back(DAG.getConstant(Val + NumElems, EltVT));
|
|
else
|
|
MaskVec.push_back(DAG.getConstant(Val - NumElems, EltVT));
|
|
}
|
|
|
|
Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V2, V1, Mask);
|
|
}
|
|
|
|
/// ShouldXformToMOVHLPS - Return true if the node should be transformed to
|
|
/// match movhlps. The lower half elements should come from upper half of
|
|
/// V1 (and in order), and the upper half elements should come from the upper
|
|
/// half of V2 (and in order).
|
|
static bool ShouldXformToMOVHLPS(SDNode *Mask) {
|
|
unsigned NumElems = Mask->getNumOperands();
|
|
if (NumElems != 4)
|
|
return false;
|
|
for (unsigned i = 0, e = 2; i != e; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i+2))
|
|
return false;
|
|
for (unsigned i = 2; i != 4; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i+4))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// isScalarLoadToVector - Returns true if the node is a scalar load that
|
|
/// is promoted to a vector.
|
|
static inline bool isScalarLoadToVector(SDNode *N) {
|
|
if (N->getOpcode() == ISD::SCALAR_TO_VECTOR) {
|
|
N = N->getOperand(0).Val;
|
|
return (N->getOpcode() == ISD::LOAD);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
|
|
/// match movlp{s|d}. The lower half elements should come from lower half of
|
|
/// V1 (and in order), and the upper half elements should come from the upper
|
|
/// half of V2 (and in order). And since V1 will become the source of the
|
|
/// MOVLP, it must be either a vector load or a scalar load to vector.
|
|
static bool ShouldXformToMOVLP(SDNode *V1, SDNode *Mask) {
|
|
if (V1->getOpcode() != ISD::LOAD && !isScalarLoadToVector(V1))
|
|
return false;
|
|
|
|
unsigned NumElems = Mask->getNumOperands();
|
|
if (NumElems != 2 && NumElems != 4)
|
|
return false;
|
|
for (unsigned i = 0, e = NumElems/2; i != e; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i))
|
|
return false;
|
|
for (unsigned i = NumElems/2; i != NumElems; ++i)
|
|
if (!isUndefOrEqual(Mask->getOperand(i), i+NumElems))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// isSplatVector - Returns true if N is a BUILD_VECTOR node whose elements are
|
|
/// all the same.
|
|
static bool isSplatVector(SDNode *N) {
|
|
if (N->getOpcode() != ISD::BUILD_VECTOR)
|
|
return false;
|
|
|
|
SDOperand SplatValue = N->getOperand(0);
|
|
for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
|
|
if (N->getOperand(i) != SplatValue)
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// NormalizeMask - V2 is a splat, modify the mask (if needed) so all elements
|
|
/// that point to V2 points to its first element.
|
|
static SDOperand NormalizeMask(SDOperand Mask, SelectionDAG &DAG) {
|
|
assert(Mask.getOpcode() == ISD::BUILD_VECTOR);
|
|
|
|
bool Changed = false;
|
|
std::vector<SDOperand> MaskVec;
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Arg = Mask.getOperand(i);
|
|
if (Arg.getOpcode() != ISD::UNDEF) {
|
|
unsigned Val = cast<ConstantSDNode>(Arg)->getValue();
|
|
if (Val > NumElems) {
|
|
Arg = DAG.getConstant(NumElems, Arg.getValueType());
|
|
Changed = true;
|
|
}
|
|
}
|
|
MaskVec.push_back(Arg);
|
|
}
|
|
|
|
if (Changed)
|
|
Mask = DAG.getNode(ISD::BUILD_VECTOR, Mask.getValueType(), MaskVec);
|
|
return Mask;
|
|
}
|
|
|
|
/// getMOVLMask - Returns a vector_shuffle mask for an movs{s|d}, movd
|
|
/// operation of specified width.
|
|
static SDOperand getMOVLMask(unsigned NumElems, SelectionDAG &DAG) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
|
|
|
|
std::vector<SDOperand> MaskVec;
|
|
MaskVec.push_back(DAG.getConstant(NumElems, BaseVT));
|
|
for (unsigned i = 1; i != NumElems; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
}
|
|
|
|
/// getUnpacklMask - Returns a vector_shuffle mask for an unpackl operation
|
|
/// of specified width.
|
|
static SDOperand getUnpacklMask(unsigned NumElems, SelectionDAG &DAG) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
|
|
std::vector<SDOperand> MaskVec;
|
|
for (unsigned i = 0, e = NumElems/2; i != e; ++i) {
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
MaskVec.push_back(DAG.getConstant(i + NumElems, BaseVT));
|
|
}
|
|
return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
}
|
|
|
|
/// getUnpackhMask - Returns a vector_shuffle mask for an unpackh operation
|
|
/// of specified width.
|
|
static SDOperand getUnpackhMask(unsigned NumElems, SelectionDAG &DAG) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
|
|
unsigned Half = NumElems/2;
|
|
std::vector<SDOperand> MaskVec;
|
|
for (unsigned i = 0; i != Half; ++i) {
|
|
MaskVec.push_back(DAG.getConstant(i + Half, BaseVT));
|
|
MaskVec.push_back(DAG.getConstant(i + NumElems + Half, BaseVT));
|
|
}
|
|
return DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
}
|
|
|
|
/// getZeroVector - Returns a vector of specified type with all zero elements.
|
|
///
|
|
static SDOperand getZeroVector(MVT::ValueType VT, SelectionDAG &DAG) {
|
|
assert(MVT::isVector(VT) && "Expected a vector type");
|
|
unsigned NumElems = getVectorNumElements(VT);
|
|
MVT::ValueType EVT = MVT::getVectorBaseType(VT);
|
|
bool isFP = MVT::isFloatingPoint(EVT);
|
|
SDOperand Zero = isFP ? DAG.getConstantFP(0.0, EVT) : DAG.getConstant(0, EVT);
|
|
std::vector<SDOperand> ZeroVec(NumElems, Zero);
|
|
return DAG.getNode(ISD::BUILD_VECTOR, VT, ZeroVec);
|
|
}
|
|
|
|
/// PromoteSplat - Promote a splat of v8i16 or v16i8 to v4i32.
|
|
///
|
|
static SDOperand PromoteSplat(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand V1 = Op.getOperand(0);
|
|
SDOperand Mask = Op.getOperand(2);
|
|
MVT::ValueType VT = Op.getValueType();
|
|
unsigned NumElems = Mask.getNumOperands();
|
|
Mask = getUnpacklMask(NumElems, DAG);
|
|
while (NumElems != 4) {
|
|
V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1, Mask);
|
|
NumElems >>= 1;
|
|
}
|
|
V1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, V1);
|
|
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
Mask = getZeroVector(MaskVT, DAG);
|
|
SDOperand Shuffle = DAG.getNode(ISD::VECTOR_SHUFFLE, MVT::v4i32, V1,
|
|
DAG.getNode(ISD::UNDEF, MVT::v4i32), Mask);
|
|
return DAG.getNode(ISD::BIT_CONVERT, VT, Shuffle);
|
|
}
|
|
|
|
/// isZeroNode - Returns true if Elt is a constant zero or a floating point
|
|
/// constant +0.0.
|
|
static inline bool isZeroNode(SDOperand Elt) {
|
|
return ((isa<ConstantSDNode>(Elt) &&
|
|
cast<ConstantSDNode>(Elt)->getValue() == 0) ||
|
|
(isa<ConstantFPSDNode>(Elt) &&
|
|
cast<ConstantFPSDNode>(Elt)->isExactlyValue(0.0)));
|
|
}
|
|
|
|
/// getShuffleVectorZeroOrUndef - Return a vector_shuffle of the specified
|
|
/// vector and zero or undef vector.
|
|
static SDOperand getShuffleVectorZeroOrUndef(SDOperand V2, MVT::ValueType VT,
|
|
unsigned NumElems, unsigned Idx,
|
|
bool isZero, SelectionDAG &DAG) {
|
|
SDOperand V1 = isZero ? getZeroVector(VT, DAG) : DAG.getNode(ISD::UNDEF, VT);
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType EVT = MVT::getVectorBaseType(MaskVT);
|
|
SDOperand Zero = DAG.getConstant(0, EVT);
|
|
std::vector<SDOperand> MaskVec(NumElems, Zero);
|
|
MaskVec[Idx] = DAG.getConstant(NumElems, EVT);
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
}
|
|
|
|
/// LowerBuildVectorv16i8 - Custom lower build_vector of v16i8.
|
|
///
|
|
static SDOperand LowerBuildVectorv16i8(SDOperand Op, unsigned NonZeros,
|
|
unsigned NumNonZero, unsigned NumZero,
|
|
SelectionDAG &DAG) {
|
|
if (NumNonZero > 8)
|
|
return SDOperand();
|
|
|
|
SDOperand V(0, 0);
|
|
bool First = true;
|
|
for (unsigned i = 0; i < 16; ++i) {
|
|
bool ThisIsNonZero = (NonZeros & (1 << i)) != 0;
|
|
if (ThisIsNonZero && First) {
|
|
if (NumZero)
|
|
V = getZeroVector(MVT::v8i16, DAG);
|
|
else
|
|
V = DAG.getNode(ISD::UNDEF, MVT::v8i16);
|
|
First = false;
|
|
}
|
|
|
|
if ((i & 1) != 0) {
|
|
SDOperand ThisElt(0, 0), LastElt(0, 0);
|
|
bool LastIsNonZero = (NonZeros & (1 << (i-1))) != 0;
|
|
if (LastIsNonZero) {
|
|
LastElt = DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, Op.getOperand(i-1));
|
|
}
|
|
if (ThisIsNonZero) {
|
|
ThisElt = DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, Op.getOperand(i));
|
|
ThisElt = DAG.getNode(ISD::SHL, MVT::i16,
|
|
ThisElt, DAG.getConstant(8, MVT::i8));
|
|
if (LastIsNonZero)
|
|
ThisElt = DAG.getNode(ISD::OR, MVT::i16, ThisElt, LastElt);
|
|
} else
|
|
ThisElt = LastElt;
|
|
|
|
if (ThisElt.Val)
|
|
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, ThisElt,
|
|
DAG.getConstant(i/2, MVT::i32));
|
|
}
|
|
}
|
|
|
|
return DAG.getNode(ISD::BIT_CONVERT, MVT::v16i8, V);
|
|
}
|
|
|
|
/// LowerBuildVectorv16i8 - Custom lower build_vector of v8i16.
|
|
///
|
|
static SDOperand LowerBuildVectorv8i16(SDOperand Op, unsigned NonZeros,
|
|
unsigned NumNonZero, unsigned NumZero,
|
|
SelectionDAG &DAG) {
|
|
if (NumNonZero > 4)
|
|
return SDOperand();
|
|
|
|
SDOperand V(0, 0);
|
|
bool First = true;
|
|
for (unsigned i = 0; i < 8; ++i) {
|
|
bool isNonZero = (NonZeros & (1 << i)) != 0;
|
|
if (isNonZero) {
|
|
if (First) {
|
|
if (NumZero)
|
|
V = getZeroVector(MVT::v8i16, DAG);
|
|
else
|
|
V = DAG.getNode(ISD::UNDEF, MVT::v8i16);
|
|
First = false;
|
|
}
|
|
V = DAG.getNode(ISD::INSERT_VECTOR_ELT, MVT::v8i16, V, Op.getOperand(i),
|
|
DAG.getConstant(i, MVT::i32));
|
|
}
|
|
}
|
|
|
|
return V;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerBUILD_VECTOR(SDOperand Op, SelectionDAG &DAG) {
|
|
// All zero's are handled with pxor.
|
|
if (ISD::isBuildVectorAllZeros(Op.Val))
|
|
return Op;
|
|
|
|
// All one's are handled with pcmpeqd.
|
|
if (ISD::isBuildVectorAllOnes(Op.Val))
|
|
return Op;
|
|
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType EVT = MVT::getVectorBaseType(VT);
|
|
unsigned EVTBits = MVT::getSizeInBits(EVT);
|
|
|
|
unsigned NumElems = Op.getNumOperands();
|
|
unsigned NumZero = 0;
|
|
unsigned NumNonZero = 0;
|
|
unsigned NonZeros = 0;
|
|
std::set<SDOperand> Values;
|
|
for (unsigned i = 0; i < NumElems; ++i) {
|
|
SDOperand Elt = Op.getOperand(i);
|
|
if (Elt.getOpcode() != ISD::UNDEF) {
|
|
Values.insert(Elt);
|
|
if (isZeroNode(Elt))
|
|
NumZero++;
|
|
else {
|
|
NonZeros |= (1 << i);
|
|
NumNonZero++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NumNonZero == 0)
|
|
// Must be a mix of zero and undef. Return a zero vector.
|
|
return getZeroVector(VT, DAG);
|
|
|
|
// Splat is obviously ok. Let legalizer expand it to a shuffle.
|
|
if (Values.size() == 1)
|
|
return SDOperand();
|
|
|
|
// Special case for single non-zero element.
|
|
if (NumNonZero == 1) {
|
|
unsigned Idx = CountTrailingZeros_32(NonZeros);
|
|
SDOperand Item = Op.getOperand(Idx);
|
|
Item = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Item);
|
|
if (Idx == 0)
|
|
// Turn it into a MOVL (i.e. movss, movsd, or movd) to a zero vector.
|
|
return getShuffleVectorZeroOrUndef(Item, VT, NumElems, Idx,
|
|
NumZero > 0, DAG);
|
|
|
|
if (EVTBits == 32) {
|
|
// Turn it into a shuffle of zero and zero-extended scalar to vector.
|
|
Item = getShuffleVectorZeroOrUndef(Item, VT, NumElems, 0, NumZero > 0,
|
|
DAG);
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType MaskEVT = MVT::getVectorBaseType(MaskVT);
|
|
std::vector<SDOperand> MaskVec;
|
|
for (unsigned i = 0; i < NumElems; i++)
|
|
MaskVec.push_back(DAG.getConstant((i == Idx) ? 0 : 1, MaskEVT));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, Item,
|
|
DAG.getNode(ISD::UNDEF, VT), Mask);
|
|
}
|
|
}
|
|
|
|
// Let legalizer expand 2-widde build_vector's.
|
|
if (EVTBits == 64)
|
|
return SDOperand();
|
|
|
|
// If element VT is < 32 bits, convert it to inserts into a zero vector.
|
|
if (EVTBits == 8) {
|
|
SDOperand V = LowerBuildVectorv16i8(Op, NonZeros,NumNonZero,NumZero, DAG);
|
|
if (V.Val) return V;
|
|
}
|
|
|
|
if (EVTBits == 16) {
|
|
SDOperand V = LowerBuildVectorv8i16(Op, NonZeros,NumNonZero,NumZero, DAG);
|
|
if (V.Val) return V;
|
|
}
|
|
|
|
// If element VT is == 32 bits, turn it into a number of shuffles.
|
|
std::vector<SDOperand> V(NumElems);
|
|
if (NumElems == 4 && NumZero > 0) {
|
|
for (unsigned i = 0; i < 4; ++i) {
|
|
bool isZero = !(NonZeros & (1 << i));
|
|
if (isZero)
|
|
V[i] = getZeroVector(VT, DAG);
|
|
else
|
|
V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
|
|
}
|
|
|
|
for (unsigned i = 0; i < 2; ++i) {
|
|
switch ((NonZeros & (0x3 << i*2)) >> (i*2)) {
|
|
default: break;
|
|
case 0:
|
|
V[i] = V[i*2]; // Must be a zero vector.
|
|
break;
|
|
case 1:
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2+1], V[i*2],
|
|
getMOVLMask(NumElems, DAG));
|
|
break;
|
|
case 2:
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2], V[i*2+1],
|
|
getMOVLMask(NumElems, DAG));
|
|
break;
|
|
case 3:
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i*2], V[i*2+1],
|
|
getUnpacklMask(NumElems, DAG));
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Take advantage of the fact GR32 to VR128 scalar_to_vector (i.e. movd)
|
|
// clears the upper bits.
|
|
// FIXME: we can do the same for v4f32 case when we know both parts of
|
|
// the lower half come from scalar_to_vector (loadf32). We should do
|
|
// that in post legalizer dag combiner with target specific hooks.
|
|
if (MVT::isInteger(EVT) && (NonZeros & (0x3 << 2)) == 0)
|
|
return V[0];
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType EVT = MVT::getVectorBaseType(MaskVT);
|
|
std::vector<SDOperand> MaskVec;
|
|
bool Reverse = (NonZeros & 0x3) == 2;
|
|
for (unsigned i = 0; i < 2; ++i)
|
|
if (Reverse)
|
|
MaskVec.push_back(DAG.getConstant(1-i, EVT));
|
|
else
|
|
MaskVec.push_back(DAG.getConstant(i, EVT));
|
|
Reverse = ((NonZeros & (0x3 << 2)) >> 2) == 2;
|
|
for (unsigned i = 0; i < 2; ++i)
|
|
if (Reverse)
|
|
MaskVec.push_back(DAG.getConstant(1-i+NumElems, EVT));
|
|
else
|
|
MaskVec.push_back(DAG.getConstant(i+NumElems, EVT));
|
|
SDOperand ShufMask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[0], V[1], ShufMask);
|
|
}
|
|
|
|
if (Values.size() > 2) {
|
|
// Expand into a number of unpckl*.
|
|
// e.g. for v4f32
|
|
// Step 1: unpcklps 0, 2 ==> X: <?, ?, 2, 0>
|
|
// : unpcklps 1, 3 ==> Y: <?, ?, 3, 1>
|
|
// Step 2: unpcklps X, Y ==> <3, 2, 1, 0>
|
|
SDOperand UnpckMask = getUnpacklMask(NumElems, DAG);
|
|
for (unsigned i = 0; i < NumElems; ++i)
|
|
V[i] = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, Op.getOperand(i));
|
|
NumElems >>= 1;
|
|
while (NumElems != 0) {
|
|
for (unsigned i = 0; i < NumElems; ++i)
|
|
V[i] = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V[i], V[i + NumElems],
|
|
UnpckMask);
|
|
NumElems >>= 1;
|
|
}
|
|
return V[0];
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand V1 = Op.getOperand(0);
|
|
SDOperand V2 = Op.getOperand(1);
|
|
SDOperand PermMask = Op.getOperand(2);
|
|
MVT::ValueType VT = Op.getValueType();
|
|
unsigned NumElems = PermMask.getNumOperands();
|
|
bool V1IsUndef = V1.getOpcode() == ISD::UNDEF;
|
|
bool V2IsUndef = V2.getOpcode() == ISD::UNDEF;
|
|
|
|
if (isSplatMask(PermMask.Val)) {
|
|
if (NumElems <= 4) return Op;
|
|
// Promote it to a v4i32 splat.
|
|
return PromoteSplat(Op, DAG);
|
|
}
|
|
|
|
if (X86::isMOVLMask(PermMask.Val))
|
|
return (V1IsUndef) ? V2 : Op;
|
|
|
|
if (X86::isMOVSHDUPMask(PermMask.Val) ||
|
|
X86::isMOVSLDUPMask(PermMask.Val) ||
|
|
X86::isMOVHLPSMask(PermMask.Val) ||
|
|
X86::isMOVHPMask(PermMask.Val) ||
|
|
X86::isMOVLPMask(PermMask.Val))
|
|
return Op;
|
|
|
|
if (ShouldXformToMOVHLPS(PermMask.Val) ||
|
|
ShouldXformToMOVLP(V1.Val, PermMask.Val))
|
|
return CommuteVectorShuffle(Op, DAG);
|
|
|
|
bool V1IsSplat = isSplatVector(V1.Val) || V1.getOpcode() == ISD::UNDEF;
|
|
bool V2IsSplat = isSplatVector(V2.Val) || V2.getOpcode() == ISD::UNDEF;
|
|
if (V1IsSplat && !V2IsSplat) {
|
|
Op = CommuteVectorShuffle(Op, DAG);
|
|
V1 = Op.getOperand(0);
|
|
V2 = Op.getOperand(1);
|
|
PermMask = Op.getOperand(2);
|
|
V2IsSplat = true;
|
|
}
|
|
|
|
if (isCommutedMOVL(PermMask.Val, V2IsSplat)) {
|
|
if (V2IsUndef) return V1;
|
|
Op = CommuteVectorShuffle(Op, DAG);
|
|
V1 = Op.getOperand(0);
|
|
V2 = Op.getOperand(1);
|
|
PermMask = Op.getOperand(2);
|
|
if (V2IsSplat) {
|
|
// V2 is a splat, so the mask may be malformed. That is, it may point
|
|
// to any V2 element. The instruction selectior won't like this. Get
|
|
// a corrected mask and commute to form a proper MOVS{S|D}.
|
|
SDOperand NewMask = getMOVLMask(NumElems, DAG);
|
|
if (NewMask.Val != PermMask.Val)
|
|
Op = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
|
|
}
|
|
return Op;
|
|
}
|
|
|
|
if (X86::isUNPCKL_v_undef_Mask(PermMask.Val) ||
|
|
X86::isUNPCKLMask(PermMask.Val) ||
|
|
X86::isUNPCKHMask(PermMask.Val))
|
|
return Op;
|
|
|
|
if (V2IsSplat) {
|
|
// Normalize mask so all entries that point to V2 points to its first
|
|
// element then try to match unpck{h|l} again. If match, return a
|
|
// new vector_shuffle with the corrected mask.
|
|
SDOperand NewMask = NormalizeMask(PermMask, DAG);
|
|
if (NewMask.Val != PermMask.Val) {
|
|
if (X86::isUNPCKLMask(PermMask.Val, true)) {
|
|
SDOperand NewMask = getUnpacklMask(NumElems, DAG);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
|
|
} else if (X86::isUNPCKHMask(PermMask.Val, true)) {
|
|
SDOperand NewMask = getUnpackhMask(NumElems, DAG);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, NewMask);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Normalize the node to match x86 shuffle ops if needed
|
|
if (V2.getOpcode() != ISD::UNDEF)
|
|
if (isCommutedSHUFP(PermMask.Val)) {
|
|
Op = CommuteVectorShuffle(Op, DAG);
|
|
V1 = Op.getOperand(0);
|
|
V2 = Op.getOperand(1);
|
|
PermMask = Op.getOperand(2);
|
|
}
|
|
|
|
// If VT is integer, try PSHUF* first, then SHUFP*.
|
|
if (MVT::isInteger(VT)) {
|
|
if (X86::isPSHUFDMask(PermMask.Val) ||
|
|
X86::isPSHUFHWMask(PermMask.Val) ||
|
|
X86::isPSHUFLWMask(PermMask.Val)) {
|
|
if (V2.getOpcode() != ISD::UNDEF)
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
|
|
DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
|
|
return Op;
|
|
}
|
|
|
|
if (X86::isSHUFPMask(PermMask.Val))
|
|
return Op;
|
|
|
|
// Handle v8i16 shuffle high / low shuffle node pair.
|
|
if (VT == MVT::v8i16 && isPSHUFHW_PSHUFLWMask(PermMask.Val)) {
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(NumElems);
|
|
MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
|
|
std::vector<SDOperand> MaskVec;
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
MaskVec.push_back(PermMask.getOperand(i));
|
|
for (unsigned i = 4; i != 8; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
MaskVec.clear();
|
|
for (unsigned i = 0; i != 4; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
for (unsigned i = 4; i != 8; ++i)
|
|
MaskVec.push_back(PermMask.getOperand(i));
|
|
Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec);
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2, Mask);
|
|
}
|
|
} else {
|
|
// Floating point cases in the other order.
|
|
if (X86::isSHUFPMask(PermMask.Val))
|
|
return Op;
|
|
if (X86::isPSHUFDMask(PermMask.Val) ||
|
|
X86::isPSHUFHWMask(PermMask.Val) ||
|
|
X86::isPSHUFLWMask(PermMask.Val)) {
|
|
if (V2.getOpcode() != ISD::UNDEF)
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1,
|
|
DAG.getNode(ISD::UNDEF, V1.getValueType()),PermMask);
|
|
return Op;
|
|
}
|
|
}
|
|
|
|
if (NumElems == 4) {
|
|
MVT::ValueType MaskVT = PermMask.getValueType();
|
|
MVT::ValueType MaskEVT = MVT::getVectorBaseType(MaskVT);
|
|
std::vector<std::pair<int, int> > Locs;
|
|
Locs.reserve(NumElems);
|
|
std::vector<SDOperand> Mask1(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
std::vector<SDOperand> Mask2(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
unsigned NumHi = 0;
|
|
unsigned NumLo = 0;
|
|
// If no more than two elements come from either vector. This can be
|
|
// implemented with two shuffles. First shuffle gather the elements.
|
|
// The second shuffle, which takes the first shuffle as both of its
|
|
// vector operands, put the elements into the right order.
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
SDOperand Elt = PermMask.getOperand(i);
|
|
if (Elt.getOpcode() == ISD::UNDEF) {
|
|
Locs[i] = std::make_pair(-1, -1);
|
|
} else {
|
|
unsigned Val = cast<ConstantSDNode>(Elt)->getValue();
|
|
if (Val < NumElems) {
|
|
Locs[i] = std::make_pair(0, NumLo);
|
|
Mask1[NumLo] = Elt;
|
|
NumLo++;
|
|
} else {
|
|
Locs[i] = std::make_pair(1, NumHi);
|
|
if (2+NumHi < NumElems)
|
|
Mask1[2+NumHi] = Elt;
|
|
NumHi++;
|
|
}
|
|
}
|
|
}
|
|
if (NumLo <= 2 && NumHi <= 2) {
|
|
V1 = DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT, Mask1));
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
if (Locs[i].first == -1)
|
|
continue;
|
|
else {
|
|
unsigned Idx = (i < NumElems/2) ? 0 : NumElems;
|
|
Idx += Locs[i].first * (NumElems/2) + Locs[i].second;
|
|
Mask2[i] = DAG.getConstant(Idx, MaskEVT);
|
|
}
|
|
}
|
|
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V1,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT, Mask2));
|
|
}
|
|
|
|
// Break it into (shuffle shuffle_hi, shuffle_lo).
|
|
Locs.clear();
|
|
std::vector<SDOperand> LoMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
std::vector<SDOperand> HiMask(NumElems, DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
std::vector<SDOperand> *MaskPtr = &LoMask;
|
|
unsigned MaskIdx = 0;
|
|
unsigned LoIdx = 0;
|
|
unsigned HiIdx = NumElems/2;
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
if (i == NumElems/2) {
|
|
MaskPtr = &HiMask;
|
|
MaskIdx = 1;
|
|
LoIdx = 0;
|
|
HiIdx = NumElems/2;
|
|
}
|
|
SDOperand Elt = PermMask.getOperand(i);
|
|
if (Elt.getOpcode() == ISD::UNDEF) {
|
|
Locs[i] = std::make_pair(-1, -1);
|
|
} else if (cast<ConstantSDNode>(Elt)->getValue() < NumElems) {
|
|
Locs[i] = std::make_pair(MaskIdx, LoIdx);
|
|
(*MaskPtr)[LoIdx] = Elt;
|
|
LoIdx++;
|
|
} else {
|
|
Locs[i] = std::make_pair(MaskIdx, HiIdx);
|
|
(*MaskPtr)[HiIdx] = Elt;
|
|
HiIdx++;
|
|
}
|
|
}
|
|
|
|
SDOperand LoShuffle =
|
|
DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT, LoMask));
|
|
SDOperand HiShuffle =
|
|
DAG.getNode(ISD::VECTOR_SHUFFLE, VT, V1, V2,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT, HiMask));
|
|
std::vector<SDOperand> MaskOps;
|
|
for (unsigned i = 0; i != NumElems; ++i) {
|
|
if (Locs[i].first == -1) {
|
|
MaskOps.push_back(DAG.getNode(ISD::UNDEF, MaskEVT));
|
|
} else {
|
|
unsigned Idx = Locs[i].first * NumElems + Locs[i].second;
|
|
MaskOps.push_back(DAG.getConstant(Idx, MaskEVT));
|
|
}
|
|
}
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, LoShuffle, HiShuffle,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskOps));
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerEXTRACT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
|
|
if (!isa<ConstantSDNode>(Op.getOperand(1)))
|
|
return SDOperand();
|
|
|
|
MVT::ValueType VT = Op.getValueType();
|
|
// TODO: handle v16i8.
|
|
if (MVT::getSizeInBits(VT) == 16) {
|
|
// Transform it so it match pextrw which produces a 32-bit result.
|
|
MVT::ValueType EVT = (MVT::ValueType)(VT+1);
|
|
SDOperand Extract = DAG.getNode(X86ISD::PEXTRW, EVT,
|
|
Op.getOperand(0), Op.getOperand(1));
|
|
SDOperand Assert = DAG.getNode(ISD::AssertZext, EVT, Extract,
|
|
DAG.getValueType(VT));
|
|
return DAG.getNode(ISD::TRUNCATE, VT, Assert);
|
|
} else if (MVT::getSizeInBits(VT) == 32) {
|
|
SDOperand Vec = Op.getOperand(0);
|
|
unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
if (Idx == 0)
|
|
return Op;
|
|
|
|
// SHUFPS the element to the lowest double word, then movss.
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
SDOperand IdxNode = DAG.getConstant((Idx < 2) ? Idx : Idx+4,
|
|
MVT::getVectorBaseType(MaskVT));
|
|
std::vector<SDOperand> IdxVec;
|
|
IdxVec.push_back(DAG.getConstant(Idx, MVT::getVectorBaseType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, IdxVec);
|
|
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
|
|
Vec, Vec, Mask);
|
|
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
|
|
DAG.getConstant(0, MVT::i32));
|
|
} else if (MVT::getSizeInBits(VT) == 64) {
|
|
SDOperand Vec = Op.getOperand(0);
|
|
unsigned Idx = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
if (Idx == 0)
|
|
return Op;
|
|
|
|
// UNPCKHPD the element to the lowest double word, then movsd.
|
|
// Note if the lower 64 bits of the result of the UNPCKHPD is then stored
|
|
// to a f64mem, the whole operation is folded into a single MOVHPDmr.
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
std::vector<SDOperand> IdxVec;
|
|
IdxVec.push_back(DAG.getConstant(1, MVT::getVectorBaseType(MaskVT)));
|
|
IdxVec.push_back(DAG.getNode(ISD::UNDEF, MVT::getVectorBaseType(MaskVT)));
|
|
SDOperand Mask = DAG.getNode(ISD::BUILD_VECTOR, MaskVT, IdxVec);
|
|
Vec = DAG.getNode(ISD::VECTOR_SHUFFLE, Vec.getValueType(),
|
|
Vec, DAG.getNode(ISD::UNDEF, Vec.getValueType()), Mask);
|
|
return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, VT, Vec,
|
|
DAG.getConstant(0, MVT::i32));
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerINSERT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
|
|
// Transform it so it match pinsrw which expects a 16-bit value in a GR32
|
|
// as its second argument.
|
|
MVT::ValueType VT = Op.getValueType();
|
|
MVT::ValueType BaseVT = MVT::getVectorBaseType(VT);
|
|
SDOperand N0 = Op.getOperand(0);
|
|
SDOperand N1 = Op.getOperand(1);
|
|
SDOperand N2 = Op.getOperand(2);
|
|
if (MVT::getSizeInBits(BaseVT) == 16) {
|
|
if (N1.getValueType() != MVT::i32)
|
|
N1 = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, N1);
|
|
if (N2.getValueType() != MVT::i32)
|
|
N2 = DAG.getConstant(cast<ConstantSDNode>(N2)->getValue(), MVT::i32);
|
|
return DAG.getNode(X86ISD::PINSRW, VT, N0, N1, N2);
|
|
} else if (MVT::getSizeInBits(BaseVT) == 32) {
|
|
unsigned Idx = cast<ConstantSDNode>(N2)->getValue();
|
|
if (Idx == 0) {
|
|
// Use a movss.
|
|
N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, N1);
|
|
MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
|
|
MVT::ValueType BaseVT = MVT::getVectorBaseType(MaskVT);
|
|
std::vector<SDOperand> MaskVec;
|
|
MaskVec.push_back(DAG.getConstant(4, BaseVT));
|
|
for (unsigned i = 1; i <= 3; ++i)
|
|
MaskVec.push_back(DAG.getConstant(i, BaseVT));
|
|
return DAG.getNode(ISD::VECTOR_SHUFFLE, VT, N0, N1,
|
|
DAG.getNode(ISD::BUILD_VECTOR, MaskVT, MaskVec));
|
|
} else {
|
|
// Use two pinsrw instructions to insert a 32 bit value.
|
|
Idx <<= 1;
|
|
if (MVT::isFloatingPoint(N1.getValueType())) {
|
|
if (N1.getOpcode() == ISD::LOAD) {
|
|
// Just load directly from f32mem to GR32.
|
|
N1 = DAG.getLoad(MVT::i32, N1.getOperand(0), N1.getOperand(1),
|
|
N1.getOperand(2));
|
|
} else {
|
|
N1 = DAG.getNode(ISD::SCALAR_TO_VECTOR, MVT::v4f32, N1);
|
|
N1 = DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, N1);
|
|
N1 = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i32, N1,
|
|
DAG.getConstant(0, MVT::i32));
|
|
}
|
|
}
|
|
N0 = DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, N0);
|
|
N0 = DAG.getNode(X86ISD::PINSRW, MVT::v8i16, N0, N1,
|
|
DAG.getConstant(Idx, MVT::i32));
|
|
N1 = DAG.getNode(ISD::SRL, MVT::i32, N1, DAG.getConstant(16, MVT::i8));
|
|
N0 = DAG.getNode(X86ISD::PINSRW, MVT::v8i16, N0, N1,
|
|
DAG.getConstant(Idx+1, MVT::i32));
|
|
return DAG.getNode(ISD::BIT_CONVERT, VT, N0);
|
|
}
|
|
}
|
|
|
|
return SDOperand();
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerSCALAR_TO_VECTOR(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand AnyExt = DAG.getNode(ISD::ANY_EXTEND, MVT::i32, Op.getOperand(0));
|
|
return DAG.getNode(X86ISD::S2VEC, Op.getValueType(), AnyExt);
|
|
}
|
|
|
|
// ConstantPool, JumpTable, GlobalAddress, and ExternalSymbol are lowered as
|
|
// their target countpart wrapped in the X86ISD::Wrapper node. Suppose N is
|
|
// one of the above mentioned nodes. It has to be wrapped because otherwise
|
|
// Select(N) returns N. So the raw TargetGlobalAddress nodes, etc. can only
|
|
// be used to form addressing mode. These wrapped nodes will be selected
|
|
// into MOV32ri.
|
|
SDOperand
|
|
X86TargetLowering::LowerConstantPool(SDOperand Op, SelectionDAG &DAG) {
|
|
ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
|
|
SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
|
|
DAG.getTargetConstantPool(CP->get(), getPointerTy(),
|
|
CP->getAlignment()));
|
|
if (Subtarget->isTargetDarwin()) {
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC)
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()), Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG) {
|
|
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
|
|
SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
|
|
DAG.getTargetGlobalAddress(GV,
|
|
getPointerTy()));
|
|
if (Subtarget->isTargetDarwin()) {
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC)
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
|
|
// For Darwin, external and weak symbols are indirect, so we want to load
|
|
// the value at address GV, not the value of GV itself. This means that
|
|
// the GlobalAddress must be in the base or index register of the address,
|
|
// not the GV offset field.
|
|
if (getTargetMachine().getRelocationModel() != Reloc::Static &&
|
|
DarwinGVRequiresExtraLoad(GV))
|
|
Result = DAG.getLoad(MVT::i32, DAG.getEntryNode(),
|
|
Result, DAG.getSrcValue(NULL));
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerExternalSymbol(SDOperand Op, SelectionDAG &DAG) {
|
|
const char *Sym = cast<ExternalSymbolSDNode>(Op)->getSymbol();
|
|
SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
|
|
DAG.getTargetExternalSymbol(Sym,
|
|
getPointerTy()));
|
|
if (Subtarget->isTargetDarwin()) {
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC)
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerShift(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getNumOperands() == 3 && Op.getValueType() == MVT::i32 &&
|
|
"Not an i64 shift!");
|
|
bool isSRA = Op.getOpcode() == ISD::SRA_PARTS;
|
|
SDOperand ShOpLo = Op.getOperand(0);
|
|
SDOperand ShOpHi = Op.getOperand(1);
|
|
SDOperand ShAmt = Op.getOperand(2);
|
|
SDOperand Tmp1 = isSRA ? DAG.getNode(ISD::SRA, MVT::i32, ShOpHi,
|
|
DAG.getConstant(31, MVT::i8))
|
|
: DAG.getConstant(0, MVT::i32);
|
|
|
|
SDOperand Tmp2, Tmp3;
|
|
if (Op.getOpcode() == ISD::SHL_PARTS) {
|
|
Tmp2 = DAG.getNode(X86ISD::SHLD, MVT::i32, ShOpHi, ShOpLo, ShAmt);
|
|
Tmp3 = DAG.getNode(ISD::SHL, MVT::i32, ShOpLo, ShAmt);
|
|
} else {
|
|
Tmp2 = DAG.getNode(X86ISD::SHRD, MVT::i32, ShOpLo, ShOpHi, ShAmt);
|
|
Tmp3 = DAG.getNode(isSRA ? ISD::SRA : ISD::SRL, MVT::i32, ShOpHi, ShAmt);
|
|
}
|
|
|
|
SDOperand InFlag = DAG.getNode(X86ISD::TEST, MVT::Flag,
|
|
ShAmt, DAG.getConstant(32, MVT::i8));
|
|
|
|
SDOperand Hi, Lo;
|
|
SDOperand CC = DAG.getConstant(X86ISD::COND_NE, MVT::i8);
|
|
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::i32);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
if (Op.getOpcode() == ISD::SHL_PARTS) {
|
|
Ops.push_back(Tmp2);
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Hi = DAG.getNode(X86ISD::CMOV, Tys, Ops);
|
|
InFlag = Hi.getValue(1);
|
|
|
|
Ops.clear();
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(Tmp1);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Lo = DAG.getNode(X86ISD::CMOV, Tys, Ops);
|
|
} else {
|
|
Ops.push_back(Tmp2);
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Lo = DAG.getNode(X86ISD::CMOV, Tys, Ops);
|
|
InFlag = Lo.getValue(1);
|
|
|
|
Ops.clear();
|
|
Ops.push_back(Tmp3);
|
|
Ops.push_back(Tmp1);
|
|
Ops.push_back(CC);
|
|
Ops.push_back(InFlag);
|
|
Hi = DAG.getNode(X86ISD::CMOV, Tys, Ops);
|
|
}
|
|
|
|
Tys.clear();
|
|
Tys.push_back(MVT::i32);
|
|
Tys.push_back(MVT::i32);
|
|
Ops.clear();
|
|
Ops.push_back(Lo);
|
|
Ops.push_back(Hi);
|
|
return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerSINT_TO_FP(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getOperand(0).getValueType() <= MVT::i64 &&
|
|
Op.getOperand(0).getValueType() >= MVT::i16 &&
|
|
"Unknown SINT_TO_FP to lower!");
|
|
|
|
SDOperand Result;
|
|
MVT::ValueType SrcVT = Op.getOperand(0).getValueType();
|
|
unsigned Size = MVT::getSizeInBits(SrcVT)/8;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
SDOperand Chain = DAG.getNode(ISD::STORE, MVT::Other,
|
|
DAG.getEntryNode(), Op.getOperand(0),
|
|
StackSlot, DAG.getSrcValue(NULL));
|
|
|
|
// Build the FILD
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::f64);
|
|
Tys.push_back(MVT::Other);
|
|
if (X86ScalarSSE) Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(SrcVT));
|
|
Result = DAG.getNode(X86ScalarSSE ? X86ISD::FILD_FLAG :X86ISD::FILD,
|
|
Tys, Ops);
|
|
|
|
if (X86ScalarSSE) {
|
|
Chain = Result.getValue(1);
|
|
SDOperand InFlag = Result.getValue(2);
|
|
|
|
// FIXME: Currently the FST is flagged to the FILD_FLAG. This
|
|
// shouldn't be necessary except that RFP cannot be live across
|
|
// multiple blocks. When stackifier is fixed, they can be uncoupled.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(8, 8);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Result);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(Op.getValueType()));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::FST, Tys, Ops);
|
|
Result = DAG.getLoad(Op.getValueType(), Chain, StackSlot,
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFP_TO_SINT(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getValueType() <= MVT::i64 && Op.getValueType() >= MVT::i16 &&
|
|
"Unknown FP_TO_SINT to lower!");
|
|
// We lower FP->sint64 into FISTP64, followed by a load, all to a temporary
|
|
// stack slot.
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
unsigned MemSize = MVT::getSizeInBits(Op.getValueType())/8;
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
|
|
SDOperand StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
|
|
unsigned Opc;
|
|
switch (Op.getValueType()) {
|
|
default: assert(0 && "Invalid FP_TO_SINT to lower!");
|
|
case MVT::i16: Opc = X86ISD::FP_TO_INT16_IN_MEM; break;
|
|
case MVT::i32: Opc = X86ISD::FP_TO_INT32_IN_MEM; break;
|
|
case MVT::i64: Opc = X86ISD::FP_TO_INT64_IN_MEM; break;
|
|
}
|
|
|
|
SDOperand Chain = DAG.getEntryNode();
|
|
SDOperand Value = Op.getOperand(0);
|
|
if (X86ScalarSSE) {
|
|
assert(Op.getValueType() == MVT::i64 && "Invalid FP_TO_SINT to lower!");
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value, StackSlot,
|
|
DAG.getSrcValue(0));
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::f64);
|
|
Tys.push_back(MVT::Other);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(StackSlot);
|
|
Ops.push_back(DAG.getValueType(Op.getOperand(0).getValueType()));
|
|
Value = DAG.getNode(X86ISD::FLD, Tys, Ops);
|
|
Chain = Value.getValue(1);
|
|
SSFI = MF.getFrameInfo()->CreateStackObject(MemSize, MemSize);
|
|
StackSlot = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
}
|
|
|
|
// Build the FP_TO_INT*_IN_MEM
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(Value);
|
|
Ops.push_back(StackSlot);
|
|
SDOperand FIST = DAG.getNode(Opc, MVT::Other, Ops);
|
|
|
|
// Load the result.
|
|
return DAG.getLoad(Op.getValueType(), FIST, StackSlot,
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFABS(SDOperand Op, SelectionDAG &DAG) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
const Type *OpNTy = MVT::getTypeForValueType(VT);
|
|
std::vector<Constant*> CV;
|
|
if (VT == MVT::f64) {
|
|
CV.push_back(ConstantFP::get(OpNTy, BitsToDouble(~(1ULL << 63))));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
} else {
|
|
CV.push_back(ConstantFP::get(OpNTy, BitsToFloat(~(1U << 31))));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
}
|
|
Constant *CS = ConstantStruct::get(CV);
|
|
SDOperand CPIdx = DAG.getConstantPool(CS, getPointerTy(), 4);
|
|
SDOperand Mask
|
|
= DAG.getNode(X86ISD::LOAD_PACK,
|
|
VT, DAG.getEntryNode(), CPIdx, DAG.getSrcValue(NULL));
|
|
return DAG.getNode(X86ISD::FAND, VT, Op.getOperand(0), Mask);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerFNEG(SDOperand Op, SelectionDAG &DAG) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
const Type *OpNTy = MVT::getTypeForValueType(VT);
|
|
std::vector<Constant*> CV;
|
|
if (VT == MVT::f64) {
|
|
CV.push_back(ConstantFP::get(OpNTy, BitsToDouble(1ULL << 63)));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
} else {
|
|
CV.push_back(ConstantFP::get(OpNTy, BitsToFloat(1U << 31)));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
CV.push_back(ConstantFP::get(OpNTy, 0.0));
|
|
}
|
|
Constant *CS = ConstantStruct::get(CV);
|
|
SDOperand CPIdx = DAG.getConstantPool(CS, getPointerTy(), 4);
|
|
SDOperand Mask = DAG.getNode(X86ISD::LOAD_PACK,
|
|
VT, DAG.getEntryNode(), CPIdx, DAG.getSrcValue(NULL));
|
|
return DAG.getNode(X86ISD::FXOR, VT, Op.getOperand(0), Mask);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerSETCC(SDOperand Op, SelectionDAG &DAG) {
|
|
assert(Op.getValueType() == MVT::i8 && "SetCC type must be 8-bit integer");
|
|
SDOperand Cond;
|
|
SDOperand CC = Op.getOperand(2);
|
|
ISD::CondCode SetCCOpcode = cast<CondCodeSDNode>(CC)->get();
|
|
bool isFP = MVT::isFloatingPoint(Op.getOperand(1).getValueType());
|
|
bool Flip;
|
|
unsigned X86CC;
|
|
if (translateX86CC(CC, isFP, X86CC, Flip)) {
|
|
if (Flip)
|
|
Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
|
|
Op.getOperand(1), Op.getOperand(0));
|
|
else
|
|
Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
|
|
Op.getOperand(0), Op.getOperand(1));
|
|
return DAG.getNode(X86ISD::SETCC, MVT::i8,
|
|
DAG.getConstant(X86CC, MVT::i8), Cond);
|
|
} else {
|
|
assert(isFP && "Illegal integer SetCC!");
|
|
|
|
Cond = DAG.getNode(X86ISD::CMP, MVT::Flag,
|
|
Op.getOperand(0), Op.getOperand(1));
|
|
std::vector<MVT::ValueType> Tys;
|
|
std::vector<SDOperand> Ops;
|
|
switch (SetCCOpcode) {
|
|
default: assert(false && "Illegal floating point SetCC!");
|
|
case ISD::SETOEQ: { // !PF & ZF
|
|
Tys.push_back(MVT::i8);
|
|
Tys.push_back(MVT::Flag);
|
|
Ops.push_back(DAG.getConstant(X86ISD::COND_NP, MVT::i8));
|
|
Ops.push_back(Cond);
|
|
SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, Tys, Ops);
|
|
SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, MVT::i8,
|
|
DAG.getConstant(X86ISD::COND_E, MVT::i8),
|
|
Tmp1.getValue(1));
|
|
return DAG.getNode(ISD::AND, MVT::i8, Tmp1, Tmp2);
|
|
}
|
|
case ISD::SETUNE: { // PF | !ZF
|
|
Tys.push_back(MVT::i8);
|
|
Tys.push_back(MVT::Flag);
|
|
Ops.push_back(DAG.getConstant(X86ISD::COND_P, MVT::i8));
|
|
Ops.push_back(Cond);
|
|
SDOperand Tmp1 = DAG.getNode(X86ISD::SETCC, Tys, Ops);
|
|
SDOperand Tmp2 = DAG.getNode(X86ISD::SETCC, MVT::i8,
|
|
DAG.getConstant(X86ISD::COND_NE, MVT::i8),
|
|
Tmp1.getValue(1));
|
|
return DAG.getNode(ISD::OR, MVT::i8, Tmp1, Tmp2);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerSELECT(SDOperand Op, SelectionDAG &DAG) {
|
|
MVT::ValueType VT = Op.getValueType();
|
|
bool isFPStack = MVT::isFloatingPoint(VT) && !X86ScalarSSE;
|
|
bool addTest = false;
|
|
SDOperand Op0 = Op.getOperand(0);
|
|
SDOperand Cond, CC;
|
|
if (Op0.getOpcode() == ISD::SETCC)
|
|
Op0 = LowerOperation(Op0, DAG);
|
|
|
|
if (Op0.getOpcode() == X86ISD::SETCC) {
|
|
// If condition flag is set by a X86ISD::CMP, then make a copy of it
|
|
// (since flag operand cannot be shared). If the X86ISD::SETCC does not
|
|
// have another use it will be eliminated.
|
|
// If the X86ISD::SETCC has more than one use, then it's probably better
|
|
// to use a test instead of duplicating the X86ISD::CMP (for register
|
|
// pressure reason).
|
|
unsigned CmpOpc = Op0.getOperand(1).getOpcode();
|
|
if (CmpOpc == X86ISD::CMP || CmpOpc == X86ISD::COMI ||
|
|
CmpOpc == X86ISD::UCOMI) {
|
|
if (!Op0.hasOneUse()) {
|
|
std::vector<MVT::ValueType> Tys;
|
|
for (unsigned i = 0; i < Op0.Val->getNumValues(); ++i)
|
|
Tys.push_back(Op0.Val->getValueType(i));
|
|
std::vector<SDOperand> Ops;
|
|
for (unsigned i = 0; i < Op0.getNumOperands(); ++i)
|
|
Ops.push_back(Op0.getOperand(i));
|
|
Op0 = DAG.getNode(X86ISD::SETCC, Tys, Ops);
|
|
}
|
|
|
|
CC = Op0.getOperand(0);
|
|
Cond = Op0.getOperand(1);
|
|
// Make a copy as flag result cannot be used by more than one.
|
|
Cond = DAG.getNode(CmpOpc, MVT::Flag,
|
|
Cond.getOperand(0), Cond.getOperand(1));
|
|
addTest =
|
|
isFPStack && !hasFPCMov(cast<ConstantSDNode>(CC)->getSignExtended());
|
|
} else
|
|
addTest = true;
|
|
} else
|
|
addTest = true;
|
|
|
|
if (addTest) {
|
|
CC = DAG.getConstant(X86ISD::COND_NE, MVT::i8);
|
|
Cond = DAG.getNode(X86ISD::TEST, MVT::Flag, Op0, Op0);
|
|
}
|
|
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(Op.getValueType());
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
// X86ISD::CMOV means set the result (which is operand 1) to the RHS if
|
|
// condition is true.
|
|
Ops.push_back(Op.getOperand(2));
|
|
Ops.push_back(Op.getOperand(1));
|
|
Ops.push_back(CC);
|
|
Ops.push_back(Cond);
|
|
return DAG.getNode(X86ISD::CMOV, Tys, Ops);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerBRCOND(SDOperand Op, SelectionDAG &DAG) {
|
|
bool addTest = false;
|
|
SDOperand Cond = Op.getOperand(1);
|
|
SDOperand Dest = Op.getOperand(2);
|
|
SDOperand CC;
|
|
if (Cond.getOpcode() == ISD::SETCC)
|
|
Cond = LowerOperation(Cond, DAG);
|
|
|
|
if (Cond.getOpcode() == X86ISD::SETCC) {
|
|
// If condition flag is set by a X86ISD::CMP, then make a copy of it
|
|
// (since flag operand cannot be shared). If the X86ISD::SETCC does not
|
|
// have another use it will be eliminated.
|
|
// If the X86ISD::SETCC has more than one use, then it's probably better
|
|
// to use a test instead of duplicating the X86ISD::CMP (for register
|
|
// pressure reason).
|
|
unsigned CmpOpc = Cond.getOperand(1).getOpcode();
|
|
if (CmpOpc == X86ISD::CMP || CmpOpc == X86ISD::COMI ||
|
|
CmpOpc == X86ISD::UCOMI) {
|
|
if (!Cond.hasOneUse()) {
|
|
std::vector<MVT::ValueType> Tys;
|
|
for (unsigned i = 0; i < Cond.Val->getNumValues(); ++i)
|
|
Tys.push_back(Cond.Val->getValueType(i));
|
|
std::vector<SDOperand> Ops;
|
|
for (unsigned i = 0; i < Cond.getNumOperands(); ++i)
|
|
Ops.push_back(Cond.getOperand(i));
|
|
Cond = DAG.getNode(X86ISD::SETCC, Tys, Ops);
|
|
}
|
|
|
|
CC = Cond.getOperand(0);
|
|
Cond = Cond.getOperand(1);
|
|
// Make a copy as flag result cannot be used by more than one.
|
|
Cond = DAG.getNode(CmpOpc, MVT::Flag,
|
|
Cond.getOperand(0), Cond.getOperand(1));
|
|
} else
|
|
addTest = true;
|
|
} else
|
|
addTest = true;
|
|
|
|
if (addTest) {
|
|
CC = DAG.getConstant(X86ISD::COND_NE, MVT::i8);
|
|
Cond = DAG.getNode(X86ISD::TEST, MVT::Flag, Cond, Cond);
|
|
}
|
|
return DAG.getNode(X86ISD::BRCOND, Op.getValueType(),
|
|
Op.getOperand(0), Op.getOperand(2), CC, Cond);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerJumpTable(SDOperand Op, SelectionDAG &DAG) {
|
|
JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
|
|
SDOperand Result = DAG.getNode(X86ISD::Wrapper, getPointerTy(),
|
|
DAG.getTargetJumpTable(JT->getIndex(),
|
|
getPointerTy()));
|
|
if (Subtarget->isTargetDarwin()) {
|
|
// With PIC, the address is actually $g + Offset.
|
|
if (getTargetMachine().getRelocationModel() == Reloc::PIC)
|
|
Result = DAG.getNode(ISD::ADD, getPointerTy(),
|
|
DAG.getNode(X86ISD::GlobalBaseReg, getPointerTy()),
|
|
Result);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerRET(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand Copy;
|
|
|
|
switch(Op.getNumOperands()) {
|
|
default:
|
|
assert(0 && "Do not know how to return this many arguments!");
|
|
abort();
|
|
case 1: // ret void.
|
|
return DAG.getNode(X86ISD::RET_FLAG, MVT::Other, Op.getOperand(0),
|
|
DAG.getConstant(getBytesToPopOnReturn(), MVT::i16));
|
|
case 2: {
|
|
MVT::ValueType ArgVT = Op.getOperand(1).getValueType();
|
|
|
|
if (MVT::isVector(ArgVT)) {
|
|
// Integer or FP vector result -> XMM0.
|
|
if (DAG.getMachineFunction().liveout_empty())
|
|
DAG.getMachineFunction().addLiveOut(X86::XMM0);
|
|
Copy = DAG.getCopyToReg(Op.getOperand(0), X86::XMM0, Op.getOperand(1),
|
|
SDOperand());
|
|
} else if (MVT::isInteger(ArgVT)) {
|
|
// Integer result -> EAX
|
|
if (DAG.getMachineFunction().liveout_empty())
|
|
DAG.getMachineFunction().addLiveOut(X86::EAX);
|
|
|
|
Copy = DAG.getCopyToReg(Op.getOperand(0), X86::EAX, Op.getOperand(1),
|
|
SDOperand());
|
|
} else if (!X86ScalarSSE) {
|
|
// FP return with fp-stack value.
|
|
if (DAG.getMachineFunction().liveout_empty())
|
|
DAG.getMachineFunction().addLiveOut(X86::ST0);
|
|
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Op.getOperand(0));
|
|
Ops.push_back(Op.getOperand(1));
|
|
Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
|
|
} else {
|
|
// FP return with ScalarSSE (return on fp-stack).
|
|
if (DAG.getMachineFunction().liveout_empty())
|
|
DAG.getMachineFunction().addLiveOut(X86::ST0);
|
|
|
|
SDOperand MemLoc;
|
|
SDOperand Chain = Op.getOperand(0);
|
|
SDOperand Value = Op.getOperand(1);
|
|
|
|
if (Value.getOpcode() == ISD::LOAD &&
|
|
(Chain == Value.getValue(1) || Chain == Value.getOperand(0))) {
|
|
Chain = Value.getOperand(0);
|
|
MemLoc = Value.getOperand(1);
|
|
} else {
|
|
// Spill the value to memory and reload it into top of stack.
|
|
unsigned Size = MVT::getSizeInBits(ArgVT)/8;
|
|
MachineFunction &MF = DAG.getMachineFunction();
|
|
int SSFI = MF.getFrameInfo()->CreateStackObject(Size, Size);
|
|
MemLoc = DAG.getFrameIndex(SSFI, getPointerTy());
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Op.getOperand(0),
|
|
Value, MemLoc, DAG.getSrcValue(0));
|
|
}
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::f64);
|
|
Tys.push_back(MVT::Other);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(MemLoc);
|
|
Ops.push_back(DAG.getValueType(ArgVT));
|
|
Copy = DAG.getNode(X86ISD::FLD, Tys, Ops);
|
|
Tys.clear();
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Copy.getValue(1));
|
|
Ops.push_back(Copy);
|
|
Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
|
|
}
|
|
break;
|
|
}
|
|
case 3:
|
|
if (DAG.getMachineFunction().liveout_empty()) {
|
|
DAG.getMachineFunction().addLiveOut(X86::EAX);
|
|
DAG.getMachineFunction().addLiveOut(X86::EDX);
|
|
}
|
|
|
|
Copy = DAG.getCopyToReg(Op.getOperand(0), X86::EDX, Op.getOperand(2),
|
|
SDOperand());
|
|
Copy = DAG.getCopyToReg(Copy, X86::EAX,Op.getOperand(1),Copy.getValue(1));
|
|
break;
|
|
}
|
|
return DAG.getNode(X86ISD::RET_FLAG, MVT::Other,
|
|
Copy, DAG.getConstant(getBytesToPopOnReturn(), MVT::i16),
|
|
Copy.getValue(1));
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG) {
|
|
if (FormalArgs.size() == 0) {
|
|
unsigned CC = cast<ConstantSDNode>(Op.getOperand(1))->getValue();
|
|
if (CC == CallingConv::Fast && EnableFastCC)
|
|
LowerFastCCArguments(Op, DAG);
|
|
else
|
|
LowerCCCArguments(Op, DAG);
|
|
}
|
|
|
|
// Return the new list of results.
|
|
std::vector<MVT::ValueType> RetVTs(Op.Val->value_begin(),
|
|
Op.Val->value_end());
|
|
return DAG.getNode(ISD::MERGE_VALUES, RetVTs, FormalArgs);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerMEMSET(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand InFlag(0, 0);
|
|
SDOperand Chain = Op.getOperand(0);
|
|
unsigned Align =
|
|
(unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
|
|
if (Align == 0) Align = 1;
|
|
|
|
ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
|
|
// If not DWORD aligned, call memset if size is less than the threshold.
|
|
// It knows how to align to the right boundary first.
|
|
if ((Align & 3) != 0 ||
|
|
(I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
|
|
MVT::ValueType IntPtr = getPointerTy();
|
|
const Type *IntPtrTy = getTargetData()->getIntPtrType();
|
|
std::vector<std::pair<SDOperand, const Type*> > Args;
|
|
Args.push_back(std::make_pair(Op.getOperand(1), IntPtrTy));
|
|
// Extend the ubyte argument to be an int value for the call.
|
|
SDOperand Val = DAG.getNode(ISD::ZERO_EXTEND, MVT::i32, Op.getOperand(2));
|
|
Args.push_back(std::make_pair(Val, IntPtrTy));
|
|
Args.push_back(std::make_pair(Op.getOperand(3), IntPtrTy));
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
LowerCallTo(Chain, Type::VoidTy, false, CallingConv::C, false,
|
|
DAG.getExternalSymbol("memset", IntPtr), Args, DAG);
|
|
return CallResult.second;
|
|
}
|
|
|
|
MVT::ValueType AVT;
|
|
SDOperand Count;
|
|
ConstantSDNode *ValC = dyn_cast<ConstantSDNode>(Op.getOperand(2));
|
|
unsigned BytesLeft = 0;
|
|
bool TwoRepStos = false;
|
|
if (ValC) {
|
|
unsigned ValReg;
|
|
unsigned Val = ValC->getValue() & 255;
|
|
|
|
// If the value is a constant, then we can potentially use larger sets.
|
|
switch (Align & 3) {
|
|
case 2: // WORD aligned
|
|
AVT = MVT::i16;
|
|
Count = DAG.getConstant(I->getValue() / 2, MVT::i32);
|
|
BytesLeft = I->getValue() % 2;
|
|
Val = (Val << 8) | Val;
|
|
ValReg = X86::AX;
|
|
break;
|
|
case 0: // DWORD aligned
|
|
AVT = MVT::i32;
|
|
if (I) {
|
|
Count = DAG.getConstant(I->getValue() / 4, MVT::i32);
|
|
BytesLeft = I->getValue() % 4;
|
|
} else {
|
|
Count = DAG.getNode(ISD::SRL, MVT::i32, Op.getOperand(3),
|
|
DAG.getConstant(2, MVT::i8));
|
|
TwoRepStos = true;
|
|
}
|
|
Val = (Val << 8) | Val;
|
|
Val = (Val << 16) | Val;
|
|
ValReg = X86::EAX;
|
|
break;
|
|
default: // Byte aligned
|
|
AVT = MVT::i8;
|
|
Count = Op.getOperand(3);
|
|
ValReg = X86::AL;
|
|
break;
|
|
}
|
|
|
|
Chain = DAG.getCopyToReg(Chain, ValReg, DAG.getConstant(Val, AVT),
|
|
InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
} else {
|
|
AVT = MVT::i8;
|
|
Count = Op.getOperand(3);
|
|
Chain = DAG.getCopyToReg(Chain, X86::AL, Op.getOperand(2), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
}
|
|
|
|
Chain = DAG.getCopyToReg(Chain, X86::ECX, Count, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Chain = DAG.getCopyToReg(Chain, X86::EDI, Op.getOperand(1), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(AVT));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_STOS, Tys, Ops);
|
|
|
|
if (TwoRepStos) {
|
|
InFlag = Chain.getValue(1);
|
|
Count = Op.getOperand(3);
|
|
MVT::ValueType CVT = Count.getValueType();
|
|
SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
|
|
DAG.getConstant(3, CVT));
|
|
Chain = DAG.getCopyToReg(Chain, X86::ECX, Left, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Tys.clear();
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(MVT::i8));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_STOS, Tys, Ops);
|
|
} else if (BytesLeft) {
|
|
// Issue stores for the last 1 - 3 bytes.
|
|
SDOperand Value;
|
|
unsigned Val = ValC->getValue() & 255;
|
|
unsigned Offset = I->getValue() - BytesLeft;
|
|
SDOperand DstAddr = Op.getOperand(1);
|
|
MVT::ValueType AddrVT = DstAddr.getValueType();
|
|
if (BytesLeft >= 2) {
|
|
Value = DAG.getConstant((Val << 8) | Val, MVT::i16);
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
|
|
DAG.getNode(ISD::ADD, AddrVT, DstAddr,
|
|
DAG.getConstant(Offset, AddrVT)),
|
|
DAG.getSrcValue(NULL));
|
|
BytesLeft -= 2;
|
|
Offset += 2;
|
|
}
|
|
|
|
if (BytesLeft == 1) {
|
|
Value = DAG.getConstant(Val, MVT::i8);
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
|
|
DAG.getNode(ISD::ADD, AddrVT, DstAddr,
|
|
DAG.getConstant(Offset, AddrVT)),
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
}
|
|
|
|
return Chain;
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerMEMCPY(SDOperand Op, SelectionDAG &DAG) {
|
|
SDOperand Chain = Op.getOperand(0);
|
|
unsigned Align =
|
|
(unsigned)cast<ConstantSDNode>(Op.getOperand(4))->getValue();
|
|
if (Align == 0) Align = 1;
|
|
|
|
ConstantSDNode *I = dyn_cast<ConstantSDNode>(Op.getOperand(3));
|
|
// If not DWORD aligned, call memcpy if size is less than the threshold.
|
|
// It knows how to align to the right boundary first.
|
|
if ((Align & 3) != 0 ||
|
|
(I && I->getValue() < Subtarget->getMinRepStrSizeThreshold())) {
|
|
MVT::ValueType IntPtr = getPointerTy();
|
|
const Type *IntPtrTy = getTargetData()->getIntPtrType();
|
|
std::vector<std::pair<SDOperand, const Type*> > Args;
|
|
Args.push_back(std::make_pair(Op.getOperand(1), IntPtrTy));
|
|
Args.push_back(std::make_pair(Op.getOperand(2), IntPtrTy));
|
|
Args.push_back(std::make_pair(Op.getOperand(3), IntPtrTy));
|
|
std::pair<SDOperand,SDOperand> CallResult =
|
|
LowerCallTo(Chain, Type::VoidTy, false, CallingConv::C, false,
|
|
DAG.getExternalSymbol("memcpy", IntPtr), Args, DAG);
|
|
return CallResult.second;
|
|
}
|
|
|
|
MVT::ValueType AVT;
|
|
SDOperand Count;
|
|
unsigned BytesLeft = 0;
|
|
bool TwoRepMovs = false;
|
|
switch (Align & 3) {
|
|
case 2: // WORD aligned
|
|
AVT = MVT::i16;
|
|
Count = DAG.getConstant(I->getValue() / 2, MVT::i32);
|
|
BytesLeft = I->getValue() % 2;
|
|
break;
|
|
case 0: // DWORD aligned
|
|
AVT = MVT::i32;
|
|
if (I) {
|
|
Count = DAG.getConstant(I->getValue() / 4, MVT::i32);
|
|
BytesLeft = I->getValue() % 4;
|
|
} else {
|
|
Count = DAG.getNode(ISD::SRL, MVT::i32, Op.getOperand(3),
|
|
DAG.getConstant(2, MVT::i8));
|
|
TwoRepMovs = true;
|
|
}
|
|
break;
|
|
default: // Byte aligned
|
|
AVT = MVT::i8;
|
|
Count = Op.getOperand(3);
|
|
break;
|
|
}
|
|
|
|
SDOperand InFlag(0, 0);
|
|
Chain = DAG.getCopyToReg(Chain, X86::ECX, Count, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Chain = DAG.getCopyToReg(Chain, X86::EDI, Op.getOperand(1), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Chain = DAG.getCopyToReg(Chain, X86::ESI, Op.getOperand(2), InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(AVT));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, Ops);
|
|
|
|
if (TwoRepMovs) {
|
|
InFlag = Chain.getValue(1);
|
|
Count = Op.getOperand(3);
|
|
MVT::ValueType CVT = Count.getValueType();
|
|
SDOperand Left = DAG.getNode(ISD::AND, CVT, Count,
|
|
DAG.getConstant(3, CVT));
|
|
Chain = DAG.getCopyToReg(Chain, X86::ECX, Left, InFlag);
|
|
InFlag = Chain.getValue(1);
|
|
Tys.clear();
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
Ops.clear();
|
|
Ops.push_back(Chain);
|
|
Ops.push_back(DAG.getValueType(MVT::i8));
|
|
Ops.push_back(InFlag);
|
|
Chain = DAG.getNode(X86ISD::REP_MOVS, Tys, Ops);
|
|
} else if (BytesLeft) {
|
|
// Issue loads and stores for the last 1 - 3 bytes.
|
|
unsigned Offset = I->getValue() - BytesLeft;
|
|
SDOperand DstAddr = Op.getOperand(1);
|
|
MVT::ValueType DstVT = DstAddr.getValueType();
|
|
SDOperand SrcAddr = Op.getOperand(2);
|
|
MVT::ValueType SrcVT = SrcAddr.getValueType();
|
|
SDOperand Value;
|
|
if (BytesLeft >= 2) {
|
|
Value = DAG.getLoad(MVT::i16, Chain,
|
|
DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
|
|
DAG.getConstant(Offset, SrcVT)),
|
|
DAG.getSrcValue(NULL));
|
|
Chain = Value.getValue(1);
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
|
|
DAG.getNode(ISD::ADD, DstVT, DstAddr,
|
|
DAG.getConstant(Offset, DstVT)),
|
|
DAG.getSrcValue(NULL));
|
|
BytesLeft -= 2;
|
|
Offset += 2;
|
|
}
|
|
|
|
if (BytesLeft == 1) {
|
|
Value = DAG.getLoad(MVT::i8, Chain,
|
|
DAG.getNode(ISD::ADD, SrcVT, SrcAddr,
|
|
DAG.getConstant(Offset, SrcVT)),
|
|
DAG.getSrcValue(NULL));
|
|
Chain = Value.getValue(1);
|
|
Chain = DAG.getNode(ISD::STORE, MVT::Other, Chain, Value,
|
|
DAG.getNode(ISD::ADD, DstVT, DstAddr,
|
|
DAG.getConstant(Offset, DstVT)),
|
|
DAG.getSrcValue(NULL));
|
|
}
|
|
}
|
|
|
|
return Chain;
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerREADCYCLCECOUNTER(SDOperand Op, SelectionDAG &DAG) {
|
|
std::vector<MVT::ValueType> Tys;
|
|
Tys.push_back(MVT::Other);
|
|
Tys.push_back(MVT::Flag);
|
|
std::vector<SDOperand> Ops;
|
|
Ops.push_back(Op.getOperand(0));
|
|
SDOperand rd = DAG.getNode(X86ISD::RDTSC_DAG, Tys, Ops);
|
|
Ops.clear();
|
|
Ops.push_back(DAG.getCopyFromReg(rd, X86::EAX, MVT::i32, rd.getValue(1)));
|
|
Ops.push_back(DAG.getCopyFromReg(Ops[0].getValue(1), X86::EDX,
|
|
MVT::i32, Ops[0].getValue(2)));
|
|
Ops.push_back(Ops[1].getValue(1));
|
|
Tys[0] = Tys[1] = MVT::i32;
|
|
Tys.push_back(MVT::Other);
|
|
return DAG.getNode(ISD::MERGE_VALUES, Tys, Ops);
|
|
}
|
|
|
|
SDOperand X86TargetLowering::LowerVASTART(SDOperand Op, SelectionDAG &DAG) {
|
|
// vastart just stores the address of the VarArgsFrameIndex slot into the
|
|
// memory location argument.
|
|
// FIXME: Replace MVT::i32 with PointerTy
|
|
SDOperand FR = DAG.getFrameIndex(VarArgsFrameIndex, MVT::i32);
|
|
return DAG.getNode(ISD::STORE, MVT::Other, Op.getOperand(0), FR,
|
|
Op.getOperand(1), Op.getOperand(2));
|
|
}
|
|
|
|
SDOperand
|
|
X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDOperand Op, SelectionDAG &DAG) {
|
|
unsigned IntNo = cast<ConstantSDNode>(Op.getOperand(0))->getValue();
|
|
switch (IntNo) {
|
|
default: return SDOperand(); // Don't custom lower most intrinsics.
|
|
// Comparison intrinsics.
|
|
case Intrinsic::x86_sse_comieq_ss:
|
|
case Intrinsic::x86_sse_comilt_ss:
|
|
case Intrinsic::x86_sse_comile_ss:
|
|
case Intrinsic::x86_sse_comigt_ss:
|
|
case Intrinsic::x86_sse_comige_ss:
|
|
case Intrinsic::x86_sse_comineq_ss:
|
|
case Intrinsic::x86_sse_ucomieq_ss:
|
|
case Intrinsic::x86_sse_ucomilt_ss:
|
|
case Intrinsic::x86_sse_ucomile_ss:
|
|
case Intrinsic::x86_sse_ucomigt_ss:
|
|
case Intrinsic::x86_sse_ucomige_ss:
|
|
case Intrinsic::x86_sse_ucomineq_ss:
|
|
case Intrinsic::x86_sse2_comieq_sd:
|
|
case Intrinsic::x86_sse2_comilt_sd:
|
|
case Intrinsic::x86_sse2_comile_sd:
|
|
case Intrinsic::x86_sse2_comigt_sd:
|
|
case Intrinsic::x86_sse2_comige_sd:
|
|
case Intrinsic::x86_sse2_comineq_sd:
|
|
case Intrinsic::x86_sse2_ucomieq_sd:
|
|
case Intrinsic::x86_sse2_ucomilt_sd:
|
|
case Intrinsic::x86_sse2_ucomile_sd:
|
|
case Intrinsic::x86_sse2_ucomigt_sd:
|
|
case Intrinsic::x86_sse2_ucomige_sd:
|
|
case Intrinsic::x86_sse2_ucomineq_sd: {
|
|
unsigned Opc = 0;
|
|
ISD::CondCode CC = ISD::SETCC_INVALID;
|
|
switch (IntNo) {
|
|
default: break;
|
|
case Intrinsic::x86_sse_comieq_ss:
|
|
case Intrinsic::x86_sse2_comieq_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETEQ;
|
|
break;
|
|
case Intrinsic::x86_sse_comilt_ss:
|
|
case Intrinsic::x86_sse2_comilt_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETLT;
|
|
break;
|
|
case Intrinsic::x86_sse_comile_ss:
|
|
case Intrinsic::x86_sse2_comile_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETLE;
|
|
break;
|
|
case Intrinsic::x86_sse_comigt_ss:
|
|
case Intrinsic::x86_sse2_comigt_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETGT;
|
|
break;
|
|
case Intrinsic::x86_sse_comige_ss:
|
|
case Intrinsic::x86_sse2_comige_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETGE;
|
|
break;
|
|
case Intrinsic::x86_sse_comineq_ss:
|
|
case Intrinsic::x86_sse2_comineq_sd:
|
|
Opc = X86ISD::COMI;
|
|
CC = ISD::SETNE;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomieq_ss:
|
|
case Intrinsic::x86_sse2_ucomieq_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETEQ;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomilt_ss:
|
|
case Intrinsic::x86_sse2_ucomilt_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETLT;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomile_ss:
|
|
case Intrinsic::x86_sse2_ucomile_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETLE;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomigt_ss:
|
|
case Intrinsic::x86_sse2_ucomigt_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETGT;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomige_ss:
|
|
case Intrinsic::x86_sse2_ucomige_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETGE;
|
|
break;
|
|
case Intrinsic::x86_sse_ucomineq_ss:
|
|
case Intrinsic::x86_sse2_ucomineq_sd:
|
|
Opc = X86ISD::UCOMI;
|
|
CC = ISD::SETNE;
|
|
break;
|
|
}
|
|
bool Flip;
|
|
unsigned X86CC;
|
|
translateX86CC(CC, true, X86CC, Flip);
|
|
SDOperand Cond = DAG.getNode(Opc, MVT::Flag, Op.getOperand(Flip?2:1),
|
|
Op.getOperand(Flip?1:2));
|
|
SDOperand SetCC = DAG.getNode(X86ISD::SETCC, MVT::i8,
|
|
DAG.getConstant(X86CC, MVT::i8), Cond);
|
|
return DAG.getNode(ISD::ANY_EXTEND, MVT::i32, SetCC);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// LowerOperation - Provide custom lowering hooks for some operations.
|
|
///
|
|
SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
|
|
switch (Op.getOpcode()) {
|
|
default: assert(0 && "Should not custom lower this!");
|
|
case ISD::BUILD_VECTOR: return LowerBUILD_VECTOR(Op, DAG);
|
|
case ISD::VECTOR_SHUFFLE: return LowerVECTOR_SHUFFLE(Op, DAG);
|
|
case ISD::EXTRACT_VECTOR_ELT: return LowerEXTRACT_VECTOR_ELT(Op, DAG);
|
|
case ISD::INSERT_VECTOR_ELT: return LowerINSERT_VECTOR_ELT(Op, DAG);
|
|
case ISD::SCALAR_TO_VECTOR: return LowerSCALAR_TO_VECTOR(Op, DAG);
|
|
case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
|
|
case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
|
|
case ISD::ExternalSymbol: return LowerExternalSymbol(Op, DAG);
|
|
case ISD::SHL_PARTS:
|
|
case ISD::SRA_PARTS:
|
|
case ISD::SRL_PARTS: return LowerShift(Op, DAG);
|
|
case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
|
|
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
|
|
case ISD::FABS: return LowerFABS(Op, DAG);
|
|
case ISD::FNEG: return LowerFNEG(Op, DAG);
|
|
case ISD::SETCC: return LowerSETCC(Op, DAG);
|
|
case ISD::SELECT: return LowerSELECT(Op, DAG);
|
|
case ISD::BRCOND: return LowerBRCOND(Op, DAG);
|
|
case ISD::JumpTable: return LowerJumpTable(Op, DAG);
|
|
case ISD::RET: return LowerRET(Op, DAG);
|
|
case ISD::FORMAL_ARGUMENTS: return LowerFORMAL_ARGUMENTS(Op, DAG);
|
|
case ISD::MEMSET: return LowerMEMSET(Op, DAG);
|
|
case ISD::MEMCPY: return LowerMEMCPY(Op, DAG);
|
|
case ISD::READCYCLECOUNTER: return LowerREADCYCLCECOUNTER(Op, DAG);
|
|
case ISD::VASTART: return LowerVASTART(Op, DAG);
|
|
case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
|
|
}
|
|
}
|
|
|
|
const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
|
|
switch (Opcode) {
|
|
default: return NULL;
|
|
case X86ISD::SHLD: return "X86ISD::SHLD";
|
|
case X86ISD::SHRD: return "X86ISD::SHRD";
|
|
case X86ISD::FAND: return "X86ISD::FAND";
|
|
case X86ISD::FXOR: return "X86ISD::FXOR";
|
|
case X86ISD::FILD: return "X86ISD::FILD";
|
|
case X86ISD::FILD_FLAG: return "X86ISD::FILD_FLAG";
|
|
case X86ISD::FP_TO_INT16_IN_MEM: return "X86ISD::FP_TO_INT16_IN_MEM";
|
|
case X86ISD::FP_TO_INT32_IN_MEM: return "X86ISD::FP_TO_INT32_IN_MEM";
|
|
case X86ISD::FP_TO_INT64_IN_MEM: return "X86ISD::FP_TO_INT64_IN_MEM";
|
|
case X86ISD::FLD: return "X86ISD::FLD";
|
|
case X86ISD::FST: return "X86ISD::FST";
|
|
case X86ISD::FP_GET_RESULT: return "X86ISD::FP_GET_RESULT";
|
|
case X86ISD::FP_SET_RESULT: return "X86ISD::FP_SET_RESULT";
|
|
case X86ISD::CALL: return "X86ISD::CALL";
|
|
case X86ISD::TAILCALL: return "X86ISD::TAILCALL";
|
|
case X86ISD::RDTSC_DAG: return "X86ISD::RDTSC_DAG";
|
|
case X86ISD::CMP: return "X86ISD::CMP";
|
|
case X86ISD::TEST: return "X86ISD::TEST";
|
|
case X86ISD::COMI: return "X86ISD::COMI";
|
|
case X86ISD::UCOMI: return "X86ISD::UCOMI";
|
|
case X86ISD::SETCC: return "X86ISD::SETCC";
|
|
case X86ISD::CMOV: return "X86ISD::CMOV";
|
|
case X86ISD::BRCOND: return "X86ISD::BRCOND";
|
|
case X86ISD::RET_FLAG: return "X86ISD::RET_FLAG";
|
|
case X86ISD::REP_STOS: return "X86ISD::REP_STOS";
|
|
case X86ISD::REP_MOVS: return "X86ISD::REP_MOVS";
|
|
case X86ISD::LOAD_PACK: return "X86ISD::LOAD_PACK";
|
|
case X86ISD::GlobalBaseReg: return "X86ISD::GlobalBaseReg";
|
|
case X86ISD::Wrapper: return "X86ISD::Wrapper";
|
|
case X86ISD::S2VEC: return "X86ISD::S2VEC";
|
|
case X86ISD::PEXTRW: return "X86ISD::PEXTRW";
|
|
case X86ISD::PINSRW: return "X86ISD::PINSRW";
|
|
}
|
|
}
|
|
|
|
void X86TargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
|
|
uint64_t Mask,
|
|
uint64_t &KnownZero,
|
|
uint64_t &KnownOne,
|
|
unsigned Depth) const {
|
|
unsigned Opc = Op.getOpcode();
|
|
assert((Opc >= ISD::BUILTIN_OP_END ||
|
|
Opc == ISD::INTRINSIC_WO_CHAIN ||
|
|
Opc == ISD::INTRINSIC_W_CHAIN ||
|
|
Opc == ISD::INTRINSIC_VOID) &&
|
|
"Should use MaskedValueIsZero if you don't know whether Op"
|
|
" is a target node!");
|
|
|
|
KnownZero = KnownOne = 0; // Don't know anything.
|
|
switch (Opc) {
|
|
default: break;
|
|
case X86ISD::SETCC:
|
|
KnownZero |= (MVT::getIntVTBitMask(Op.getValueType()) ^ 1ULL);
|
|
break;
|
|
}
|
|
}
|
|
|
|
std::vector<unsigned> X86TargetLowering::
|
|
getRegClassForInlineAsmConstraint(const std::string &Constraint,
|
|
MVT::ValueType VT) const {
|
|
if (Constraint.size() == 1) {
|
|
// FIXME: not handling fp-stack yet!
|
|
// FIXME: not handling MMX registers yet ('y' constraint).
|
|
switch (Constraint[0]) { // GCC X86 Constraint Letters
|
|
default: break; // Unknown constriant letter
|
|
case 'r': // GENERAL_REGS
|
|
case 'R': // LEGACY_REGS
|
|
if (VT == MVT::i32)
|
|
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
|
|
X86::ESI, X86::EDI, X86::EBP, X86::ESP, 0);
|
|
else if (VT == MVT::i16)
|
|
return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
|
|
X86::SI, X86::DI, X86::BP, X86::SP, 0);
|
|
else if (VT == MVT::i8)
|
|
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
|
|
break;
|
|
case 'l': // INDEX_REGS
|
|
if (VT == MVT::i32)
|
|
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX,
|
|
X86::ESI, X86::EDI, X86::EBP, 0);
|
|
else if (VT == MVT::i16)
|
|
return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX,
|
|
X86::SI, X86::DI, X86::BP, 0);
|
|
else if (VT == MVT::i8)
|
|
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
|
|
break;
|
|
case 'q': // Q_REGS (GENERAL_REGS in 64-bit mode)
|
|
case 'Q': // Q_REGS
|
|
if (VT == MVT::i32)
|
|
return make_vector<unsigned>(X86::EAX, X86::EDX, X86::ECX, X86::EBX, 0);
|
|
else if (VT == MVT::i16)
|
|
return make_vector<unsigned>(X86::AX, X86::DX, X86::CX, X86::BX, 0);
|
|
else if (VT == MVT::i8)
|
|
return make_vector<unsigned>(X86::AL, X86::DL, X86::CL, X86::DL, 0);
|
|
break;
|
|
case 'x': // SSE_REGS if SSE1 allowed
|
|
if (Subtarget->hasSSE1())
|
|
return make_vector<unsigned>(X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
|
|
X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7,
|
|
0);
|
|
return std::vector<unsigned>();
|
|
case 'Y': // SSE_REGS if SSE2 allowed
|
|
if (Subtarget->hasSSE2())
|
|
return make_vector<unsigned>(X86::XMM0, X86::XMM1, X86::XMM2, X86::XMM3,
|
|
X86::XMM4, X86::XMM5, X86::XMM6, X86::XMM7,
|
|
0);
|
|
return std::vector<unsigned>();
|
|
}
|
|
}
|
|
|
|
return std::vector<unsigned>();
|
|
}
|
|
|
|
/// isLegalAddressImmediate - Return true if the integer value or
|
|
/// GlobalValue can be used as the offset of the target addressing mode.
|
|
bool X86TargetLowering::isLegalAddressImmediate(int64_t V) const {
|
|
// X86 allows a sign-extended 32-bit immediate field.
|
|
return (V > -(1LL << 32) && V < (1LL << 32)-1);
|
|
}
|
|
|
|
bool X86TargetLowering::isLegalAddressImmediate(GlobalValue *GV) const {
|
|
if (Subtarget->isTargetDarwin()) {
|
|
Reloc::Model RModel = getTargetMachine().getRelocationModel();
|
|
if (RModel == Reloc::Static)
|
|
return true;
|
|
else if (RModel == Reloc::DynamicNoPIC)
|
|
return !DarwinGVRequiresExtraLoad(GV);
|
|
else
|
|
return false;
|
|
} else
|
|
return true;
|
|
}
|
|
|
|
/// isShuffleMaskLegal - Targets can use this to indicate that they only
|
|
/// support *some* VECTOR_SHUFFLE operations, those with specific masks.
|
|
/// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
|
|
/// are assumed to be legal.
|
|
bool
|
|
X86TargetLowering::isShuffleMaskLegal(SDOperand Mask, MVT::ValueType VT) const {
|
|
// Only do shuffles on 128-bit vector types for now.
|
|
if (MVT::getSizeInBits(VT) == 64) return false;
|
|
return (Mask.Val->getNumOperands() <= 4 ||
|
|
isSplatMask(Mask.Val) ||
|
|
isPSHUFHW_PSHUFLWMask(Mask.Val) ||
|
|
X86::isUNPCKLMask(Mask.Val) ||
|
|
X86::isUNPCKL_v_undef_Mask(Mask.Val) ||
|
|
X86::isUNPCKHMask(Mask.Val));
|
|
}
|
|
|
|
bool X86TargetLowering::isVectorClearMaskLegal(std::vector<SDOperand> &BVOps,
|
|
MVT::ValueType EVT,
|
|
SelectionDAG &DAG) const {
|
|
unsigned NumElts = BVOps.size();
|
|
// Only do shuffles on 128-bit vector types for now.
|
|
if (MVT::getSizeInBits(EVT) * NumElts == 64) return false;
|
|
if (NumElts == 2) return true;
|
|
if (NumElts == 4) {
|
|
return (isMOVLMask(BVOps) || isCommutedMOVL(BVOps, true) ||
|
|
isSHUFPMask(BVOps) || isCommutedSHUFP(BVOps));
|
|
}
|
|
return false;
|
|
}
|