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Automatically fold COPY instructions into stack load/store.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108012 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-07-09 20:43:13 +00:00
parent 9c50e8b890
commit 1f32340d95
4 changed files with 80 additions and 14 deletions
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6
include/llvm/Target/TargetInstrInfo.h
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@@ -478,9 +478,7 @@ public:
/// folding is possible.
virtual
bool canFoldMemoryOperand(const MachineInstr *MI,
const SmallVectorImpl<unsigned> &Ops) const {
return false;
}
const SmallVectorImpl<unsigned> &Ops) const =0;
/// unfoldMemoryOperand - Separate a single instruction which folded a load or
/// a store or a load and a store into two or more instruction. If this is
@@ -643,6 +641,8 @@ public:
bool NewMI = false) const;
virtual bool findCommutedOpIndices(MachineInstr *MI, unsigned &SrcOpIdx1,
unsigned &SrcOpIdx2) const;
virtual bool canFoldMemoryOperand(const MachineInstr *MI,
const SmallVectorImpl<unsigned> &Ops) const;
virtual bool PredicateInstruction(MachineInstr *MI,
const SmallVectorImpl<MachineOperand> &Pred) const;
virtual void reMaterialize(MachineBasicBlock &MBB,