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Allow strength reduction to make use of addressing modes for the

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address operand in a prefetch intrinsic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36713 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2007-05-03 23:20:33 +00:00
parent 50954f5cba
commit 2acc760165
1 changed files with 10 additions and 1 deletions
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11
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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@ -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<LoadInst>(UsersToProcess[i].Inst);
if (StoreInst *SI = dyn_cast<StoreInst>(UsersToProcess[i].Inst))
if (StoreInst *SI = dyn_cast<StoreInst>(UsersToProcess[i].Inst)) {
if (SI->getOperand(1) == UsersToProcess[i].OperandValToReplace)
isAddress = true;
} else if (CallInst *CI = dyn_cast<CallInst>(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);