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[TTI] Let getOperationCost assume that Freeze is free

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This commit is contained in:
Juneyoung Lee 2020-02-27 02:56:01 +09:00
parent 017c178b5d
commit 0958192882
1 changed files with 5 additions and 0 deletions
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5
include/llvm/Analysis/TargetTransformInfoImpl.h
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@ -62,6 +62,11 @@ public:
// Otherwise, the default basic cost is used.
return TTI::TCC_Basic;
case Instruction::Freeze:
// Freeze operation is free because it should be lowered into a register
// use without any register copy in assembly code.
return TTI::TCC_Free;
case Instruction::FDiv:
case Instruction::FRem:
case Instruction::SDiv: