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Turn x86 unaligned load/store intrinsics into aligned load/store instructions

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if the pointer is known aligned.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27781 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-04-17 22:26:56 +00:00
parent 80edfb3af5
commit fd6bdf0b0f
1 changed files with 16 additions and 1 deletions
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17
lib/Transforms/Scalar/InstructionCombining.cpp
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@ -5471,7 +5471,11 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
default: break;
case Intrinsic::ppc_altivec_lvx:
case Intrinsic::ppc_altivec_lvxl:
// Turn lvx -> load if the pointer is known aligned.
case Intrinsic::x86_sse_loadu_ps:
case Intrinsic::x86_sse2_loadu_pd:
case Intrinsic::x86_sse2_loadu_dq:
// Turn PPC lvx -> load if the pointer is known aligned.
// Turn X86 loadups -> load if the pointer is known aligned.
if (GetKnownAlignment(II->getOperand(1), TD) >= 16) {
Value *Ptr = InsertCastBefore(II->getOperand(1),
PointerType::get(II->getType()), CI);
@ -5487,6 +5491,17 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
return new StoreInst(II->getOperand(1), Ptr);
}
break;
case Intrinsic::x86_sse_storeu_ps:
case Intrinsic::x86_sse2_storeu_pd:
case Intrinsic::x86_sse2_storeu_dq:
case Intrinsic::x86_sse2_storel_dq:
// Turn X86 storeu -> store if the pointer is known aligned.
if (GetKnownAlignment(II->getOperand(1), TD) >= 16) {
const Type *OpPtrTy = PointerType::get(II->getOperand(2)->getType());
Value *Ptr = InsertCastBefore(II->getOperand(1), OpPtrTy, CI);
return new StoreInst(II->getOperand(2), Ptr);
}
break;
case Intrinsic::ppc_altivec_vperm:
// Turn vperm(V1,V2,mask) -> shuffle(V1,V2,mask) if mask is a constant.
if (ConstantPacked *Mask = dyn_cast<ConstantPacked>(II->getOperand(3))) {