From 06f5ebc5a1604b01689cf2d482dd05f956538af6 Mon Sep 17 00:00:00 2001 From: Quentin Colombet Date: Fri, 31 May 2013 21:29:03 +0000 Subject: Loop Strength Reduce: Scaling factor cost. Account for the cost of scaling factor in Loop Strength Reduce when rating the formulae. This uses a target hook. The default implementation of the hook is: if the addressing mode is legal, the scaling factor is free. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183045 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/TargetTransformInfo.cpp | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'lib/Analysis/TargetTransformInfo.cpp') diff --git a/lib/Analysis/TargetTransformInfo.cpp b/lib/Analysis/TargetTransformInfo.cpp index 64f8e96884..35ce794c7f 100644 --- a/lib/Analysis/TargetTransformInfo.cpp +++ b/lib/Analysis/TargetTransformInfo.cpp @@ -108,6 +108,14 @@ bool TargetTransformInfo::isLegalAddressingMode(Type *Ty, GlobalValue *BaseGV, Scale); } +int TargetTransformInfo::getScalingFactorCost(Type *Ty, GlobalValue *BaseGV, + int64_t BaseOffset, + bool HasBaseReg, + int64_t Scale) const { + return PrevTTI->getScalingFactorCost(Ty, BaseGV, BaseOffset, HasBaseReg, + Scale); +} + bool TargetTransformInfo::isTruncateFree(Type *Ty1, Type *Ty2) const { return PrevTTI->isTruncateFree(Ty1, Ty2); } @@ -457,6 +465,15 @@ struct NoTTI : ImmutablePass, TargetTransformInfo { return !BaseGV && BaseOffset == 0 && Scale <= 1; } + int getScalingFactorCost(Type *Ty, GlobalValue *BaseGV, int64_t BaseOffset, + bool HasBaseReg, int64_t Scale) const { + // Guess that all legal addressing mode are free. + if(isLegalAddressingMode(Ty, BaseGV, BaseOffset, HasBaseReg, Scale)) + return 0; + return -1; + } + + bool isTruncateFree(Type *Ty1, Type *Ty2) const { return false; } -- cgit v1.2.3