From 2acc7601650654d03cd53faeece8d7685a203105 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Thu, 3 May 2007 23:20:33 +0000 Subject: [PATCH] Allow strength reduction to make use of addressing modes for the address operand in a prefetch intrinsic. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36713 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/LoopStrengthReduce.cpp | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/lib/Transforms/Scalar/LoopStrengthReduce.cpp index bf0484c292c..652b39f4c64 100644 --- a/lib/Transforms/Scalar/LoopStrengthReduce.cpp +++ b/lib/Transforms/Scalar/LoopStrengthReduce.cpp @@ -19,6 +19,7 @@ #include "llvm/Transforms/Scalar.h" #include "llvm/Constants.h" #include "llvm/Instructions.h" +#include "llvm/Intrinsics.h" #include "llvm/Type.h" #include "llvm/DerivedTypes.h" #include "llvm/Analysis/Dominators.h" @@ -1039,9 +1040,17 @@ void LoopStrengthReduce::StrengthReduceStridedIVUsers(const SCEVHandle &Stride, // Addressing modes can be folded into loads and stores. Be careful that // the store is through the expression, not of the expression though. bool isAddress = isa(UsersToProcess[i].Inst); - if (StoreInst *SI = dyn_cast(UsersToProcess[i].Inst)) + if (StoreInst *SI = dyn_cast(UsersToProcess[i].Inst)) { if (SI->getOperand(1) == UsersToProcess[i].OperandValToReplace) isAddress = true; + } else if (CallInst *CI = dyn_cast(UsersToProcess[i].Inst)) { + // Addressing modes can also be folded into prefetches. + Function *CalledFunc = CI->getCalledFunction(); + if (CalledFunc != NULL && + CalledFunc->getIntrinsicID() == Intrinsic::prefetch && + CI->getOperand(1) == UsersToProcess[i].OperandValToReplace) + isAddress = true; + } MoveImmediateValues(TLI, UsersToProcess[i].Inst, UsersToProcess[i].Base, UsersToProcess[i].Imm, isAddress, L); -- 2.34.1