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.
<rdar://problem/13806271>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183045 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/BasicTargetTransformInfo.cpp b/lib/CodeGen/BasicTargetTransformInfo.cpp
index 4a99184..92a5bb7 100644
--- a/lib/CodeGen/BasicTargetTransformInfo.cpp
+++ b/lib/CodeGen/BasicTargetTransformInfo.cpp
@@ -71,6 +71,9 @@
virtual bool isLegalAddressingMode(Type *Ty, GlobalValue *BaseGV,
int64_t BaseOffset, bool HasBaseReg,
int64_t Scale) const;
+ virtual int getScalingFactorCost(Type *Ty, GlobalValue *BaseGV,
+ int64_t BaseOffset, bool HasBaseReg,
+ int64_t Scale) const;
virtual bool isTruncateFree(Type *Ty1, Type *Ty2) const;
virtual bool isTypeLegal(Type *Ty) const;
virtual unsigned getJumpBufAlignment() const;
@@ -139,6 +142,17 @@
return TLI->isLegalAddressingMode(AM, Ty);
}
+int BasicTTI::getScalingFactorCost(Type *Ty, GlobalValue *BaseGV,
+ int64_t BaseOffset, bool HasBaseReg,
+ int64_t Scale) const {
+ TargetLoweringBase::AddrMode AM;
+ AM.BaseGV = BaseGV;
+ AM.BaseOffs = BaseOffset;
+ AM.HasBaseReg = HasBaseReg;
+ AM.Scale = Scale;
+ return TLI->getScalingFactorCost(AM, Ty);
+}
+
bool BasicTTI::isTruncateFree(Type *Ty1, Type *Ty2) const {
return TLI->isTruncateFree(Ty1, Ty2);
}