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93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
//===-- PIC16ISelLowering.h - PIC16 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 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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//
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// This file defines the interfaces that PIC16 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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#ifndef PIC16ISELLOWERING_H
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#define PIC16ISELLOWERING_H
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#include "PIC16.h"
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#include "PIC16Subtarget.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/Target/TargetLowering.h"
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namespace llvm {
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namespace PIC16ISD {
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enum NodeType {
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// Start the numbering from where ISD NodeType finishes.
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FIRST_NUMBER = ISD::BUILTIN_OP_END+PIC16::INSTRUCTION_LIST_END,
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// used for encapsulating the expanded nodes into one node.
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Package,
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// Get the Higher 16 bits from a 32-bit immediate
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Hi,
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// Get the Lower 16 bits from a 32-bit immediate
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Lo,
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Cmp, // PIC16 Generic Comparison instruction.
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Branch, // PIC16 Generic Branch Instruction.
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BTFSS, // PIC16 BitTest Instruction (Skip if set).
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BTFSC, // PIC16 BitTest Instruction (Skip if clear).
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// PIC16 comparison to be converted to either XOR or SUB
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// Following instructions cater to those convertions.
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XORCC,
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SUBCC,
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// Get the Global Address wrapped into a wrapper that also captures
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// the bank or page.
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Wrapper,
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SetBank,
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SetPage
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};
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}
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//===--------------------------------------------------------------------===//
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// TargetLowering Implementation
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//===--------------------------------------------------------------------===//
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class PIC16TargetLowering : public TargetLowering
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{
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public:
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typedef std::map<SDNode *, SDNode *> NodeMap_t;
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explicit PIC16TargetLowering(PIC16TargetMachine &TM);
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/// LowerOperation - Provide custom lowering hooks for some operations.
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virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
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SDValue LowerGlobalAddress(SDValue Op, SelectionDAG &DAG);
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SDValue LowerFORMAL_ARGUMENTS(SDValue Op, SelectionDAG &DAG);
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SDValue LowerRET(SDValue Op, SelectionDAG &DAG);
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SDValue LowerFrameIndex(SDValue Op, SelectionDAG &DAG);
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SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG);
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SDValue RemoveHiLo(SDNode *, SelectionDAG &DAG,
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DAGCombinerInfo &DCI) const;
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SDValue LowerADDSUB(SDNode *, SelectionDAG &DAG,
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DAGCombinerInfo &DCI) const;
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SDValue LowerLOAD(SDNode *, SelectionDAG &DAG,
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DAGCombinerInfo &DCI) const;
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/// getTargetNodeName - This method returns the name of a target specific
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// DAG node.
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virtual const char *getTargetNodeName(unsigned Opcode) const;
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virtual SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const;
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// utility function.
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const SDValue *findLoadi8(const SDValue &Src, SelectionDAG &DAG) const;
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};
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} // namespace llvm
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#endif // PIC16ISELLOWERING_H
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