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ec4db6ab5f
invalid instruction sequence. Rather than emitting an int-to-FP move instruction and an int-to-FP conversion instruction during instruction selection, we emit a pseudo instruction which gets expanded post-RA. Without this change, register allocation can possibly insert a floating point register move instruction between the two instructions, which is not valid according to the ISA manual. mtc1 $f4, $4 # int-to-fp move instruction. mov.s $f2, $f4 # move contents of $f4 to $f2. cvt.s.w $f0, $f2 # int-to-fp conversion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182042 91177308-0d34-0410-b5e6-96231b3b80d8
103 lines
4.3 KiB
C++
103 lines
4.3 KiB
C++
//===-- MipsSEInstrInfo.h - Mips32/64 Instruction Information ---*- 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 contains the Mips32/64 implementation of the TargetInstrInfo class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSSEINSTRUCTIONINFO_H
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#define MIPSSEINSTRUCTIONINFO_H
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#include "MipsInstrInfo.h"
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#include "MipsSERegisterInfo.h"
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namespace llvm {
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class MipsSEInstrInfo : public MipsInstrInfo {
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const MipsSERegisterInfo RI;
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bool IsN64;
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public:
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explicit MipsSEInstrInfo(MipsTargetMachine &TM);
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virtual const MipsRegisterInfo &getRegisterInfo() const;
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/// isLoadFromStackSlot - If the specified machine instruction is a direct
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/// load from a stack slot, return the virtual or physical register number of
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/// the destination along with the FrameIndex of the loaded stack slot. If
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/// not, return 0. This predicate must return 0 if the instruction has
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/// any side effects other than loading from the stack slot.
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virtual unsigned isLoadFromStackSlot(const MachineInstr *MI,
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int &FrameIndex) const;
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/// isStoreToStackSlot - If the specified machine instruction is a direct
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/// store to a stack slot, return the virtual or physical register number of
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/// the source reg along with the FrameIndex of the loaded stack slot. If
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/// not, return 0. This predicate must return 0 if the instruction has
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/// any side effects other than storing to the stack slot.
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virtual unsigned isStoreToStackSlot(const MachineInstr *MI,
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int &FrameIndex) const;
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virtual void copyPhysReg(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI, DebugLoc DL,
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unsigned DestReg, unsigned SrcReg,
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bool KillSrc) const;
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virtual void storeRegToStack(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned SrcReg, bool isKill, int FrameIndex,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI,
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int64_t Offset) const;
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virtual void loadRegFromStack(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned DestReg, int FrameIndex,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI,
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int64_t Offset) const;
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virtual bool expandPostRAPseudo(MachineBasicBlock::iterator MI) const;
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virtual unsigned getOppositeBranchOpc(unsigned Opc) const;
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/// Adjust SP by Amount bytes.
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void adjustStackPtr(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const;
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/// Emit a series of instructions to load an immediate. If NewImm is a
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/// non-NULL parameter, the last instruction is not emitted, but instead
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/// its immediate operand is returned in NewImm.
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unsigned loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
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MachineBasicBlock::iterator II, DebugLoc DL,
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unsigned *NewImm) const;
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private:
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virtual unsigned getAnalyzableBrOpc(unsigned Opc) const;
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void expandRetRA(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
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unsigned Opc) const;
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void expandCvtFPInt(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
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unsigned CvtOpc, unsigned MovOpc, bool DstIsLarger,
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bool SrcIsLarger, bool IsI64) const;
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void expandExtractElementF64(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const;
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void expandBuildPairF64(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const;
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void expandDPLoadStore(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I, unsigned OpcD,
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unsigned OpcS) const;
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void expandEhReturn(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator I) const;
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};
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}
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#endif
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