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a0cd02ace9
Summary: ... and after all that refactoring, it's possible to distinguish softfloat floating point values from integers so this patch no longer breaks softfloat to do it. Remove direct handling of i32's in the N32/N64 ABI by promoting them to i64. This more closely reflects the ABI documentation and also fixes problems with stack arguments on big-endian targets. We now rely on signext/zeroext annotations (already generated by clang) and the Assert[SZ]ext nodes to avoid the introduction of unnecessary sign/zero extends. It was not possible to convert three tests to use signext/zeroext. These tests are bswap.ll, ctlz-v.ll, ctlz-v.ll. It's not possible to put signext on a vector type so we just accept the sign extends here for now. These tests don't pass the vectors the same way clang does (clang puts multiple elements in the same argument, these map 1 element to 1 argument) so we don't need to worry too much about it. With this patch, all known N32/N64 bugs should be fixed and we now pass the first 10,000 tests generated by ABITest.py. Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D6117 llvm-svn: 221534
142 lines
5.3 KiB
C++
142 lines
5.3 KiB
C++
//===---- MipsCCState.cpp - CCState with Mips specific extensions ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "MipsCCState.h"
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#include "MipsSubtarget.h"
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#include "llvm/IR/Module.h"
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using namespace llvm;
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/// This function returns true if CallSym is a long double emulation routine.
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static bool isF128SoftLibCall(const char *CallSym) {
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const char *const LibCalls[] = {
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"__addtf3", "__divtf3", "__eqtf2", "__extenddftf2",
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"__extendsftf2", "__fixtfdi", "__fixtfsi", "__fixtfti",
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"__fixunstfdi", "__fixunstfsi", "__fixunstfti", "__floatditf",
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"__floatsitf", "__floattitf", "__floatunditf", "__floatunsitf",
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"__floatuntitf", "__getf2", "__gttf2", "__letf2",
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"__lttf2", "__multf3", "__netf2", "__powitf2",
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"__subtf3", "__trunctfdf2", "__trunctfsf2", "__unordtf2",
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"ceill", "copysignl", "cosl", "exp2l",
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"expl", "floorl", "fmal", "fmodl",
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"log10l", "log2l", "logl", "nearbyintl",
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"powl", "rintl", "sinl", "sqrtl",
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"truncl"};
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const char *const *End = LibCalls + array_lengthof(LibCalls);
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// Check that LibCalls is sorted alphabetically.
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MipsTargetLowering::LTStr Comp;
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#ifndef NDEBUG
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for (const char *const *I = LibCalls; I < End - 1; ++I)
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assert(Comp(*I, *(I + 1)));
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#endif
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return std::binary_search(LibCalls, End, CallSym, Comp);
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}
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/// This function returns true if Ty is fp128, {f128} or i128 which was
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/// originally a fp128.
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static bool originalTypeIsF128(const Type *Ty, const SDNode *CallNode) {
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if (Ty->isFP128Ty())
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return true;
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if (Ty->isStructTy() && Ty->getStructNumElements() == 1 &&
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Ty->getStructElementType(0)->isFP128Ty())
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return true;
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const ExternalSymbolSDNode *ES =
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dyn_cast_or_null<const ExternalSymbolSDNode>(CallNode);
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// If the Ty is i128 and the function being called is a long double emulation
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// routine, then the original type is f128.
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return (ES && Ty->isIntegerTy(128) && isF128SoftLibCall(ES->getSymbol()));
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}
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MipsCCState::SpecialCallingConvType
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MipsCCState::getSpecialCallingConvForCallee(const SDNode *Callee,
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const MipsSubtarget &Subtarget) {
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MipsCCState::SpecialCallingConvType SpecialCallingConv = NoSpecialCallingConv;
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if (Subtarget.inMips16HardFloat()) {
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if (const GlobalAddressSDNode *G =
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dyn_cast<const GlobalAddressSDNode>(Callee)) {
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llvm::StringRef Sym = G->getGlobal()->getName();
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Function *F = G->getGlobal()->getParent()->getFunction(Sym);
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if (F && F->hasFnAttribute("__Mips16RetHelper")) {
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SpecialCallingConv = Mips16RetHelperConv;
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}
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}
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}
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return SpecialCallingConv;
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}
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void MipsCCState::PreAnalyzeCallResultForF128(
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const SmallVectorImpl<ISD::InputArg> &Ins,
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const TargetLowering::CallLoweringInfo &CLI) {
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for (unsigned i = 0; i < Ins.size(); ++i) {
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OriginalArgWasF128.push_back(
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originalTypeIsF128(CLI.RetTy, CLI.Callee.getNode()));
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OriginalArgWasFloat.push_back(CLI.RetTy->isFloatingPointTy());
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}
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}
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/// Identify lowered values that originated from f128 arguments and record
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/// this for use by RetCC_MipsN.
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void MipsCCState::PreAnalyzeReturnForF128(
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const SmallVectorImpl<ISD::OutputArg> &Outs) {
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const MachineFunction &MF = getMachineFunction();
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for (unsigned i = 0; i < Outs.size(); ++i) {
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OriginalArgWasF128.push_back(
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originalTypeIsF128(MF.getFunction()->getReturnType(), nullptr));
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OriginalArgWasFloat.push_back(
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MF.getFunction()->getReturnType()->isFloatingPointTy());
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}
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}
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/// Identify lowered values that originated from f128 arguments and record
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/// this.
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void MipsCCState::PreAnalyzeCallOperands(
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const SmallVectorImpl<ISD::OutputArg> &Outs,
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std::vector<TargetLowering::ArgListEntry> &FuncArgs,
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const SDNode *CallNode) {
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for (unsigned i = 0; i < Outs.size(); ++i) {
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OriginalArgWasF128.push_back(
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originalTypeIsF128(FuncArgs[Outs[i].OrigArgIndex].Ty, CallNode));
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OriginalArgWasFloat.push_back(
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FuncArgs[Outs[i].OrigArgIndex].Ty->isFloatingPointTy());
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CallOperandIsFixed.push_back(Outs[i].IsFixed);
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}
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}
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/// Identify lowered values that originated from f128 arguments and record
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/// this.
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void MipsCCState::PreAnalyzeFormalArgumentsForF128(
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const SmallVectorImpl<ISD::InputArg> &Ins) {
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const MachineFunction &MF = getMachineFunction();
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for (unsigned i = 0; i < Ins.size(); ++i) {
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Function::const_arg_iterator FuncArg = MF.getFunction()->arg_begin();
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// SRet arguments cannot originate from f128 or {f128} returns so we just
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// push false. We have to handle this specially since SRet arguments
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// aren't mapped to an original argument.
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if (Ins[i].Flags.isSRet()) {
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OriginalArgWasF128.push_back(false);
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continue;
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}
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assert(Ins[i].OrigArgIndex < MF.getFunction()->arg_size());
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std::advance(FuncArg, Ins[i].OrigArgIndex);
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OriginalArgWasF128.push_back(
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originalTypeIsF128(FuncArg->getType(), nullptr));
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OriginalArgWasFloat.push_back(FuncArg->getType()->isFloatingPointTy());
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}
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}
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