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Add TargetInstrInfo interface isAsCheapAsAMove.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214158 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jiangning Liu
2014-07-29 01:55:19 +00:00
parent 994af148ca
commit f3224d0617
8 changed files with 23 additions and 9 deletions
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9
include/llvm/Target/TargetInstrInfo.h
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@@ -200,6 +200,15 @@ public:
unsigned &Size, unsigned &Offset,
const TargetMachine *TM) const;
/// isAsCheapAsAMove - Return true if the instruction is as cheap as a move
/// instruction.
///
/// Targets for different archs need to override this, and different
/// micro-architectures can also be finely tuned inside.
virtual bool isAsCheapAsAMove(const MachineInstr *MI) const {
return MI->isAsCheapAsAMove();
}
/// reMaterialize - Re-issue the specified 'original' instruction at the
/// specific location targeting a new destination register.
/// The register in Orig->getOperand(0).getReg() will be substituted by