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Reapply r129401 with patch for clang.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129419 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2011-04-13 00:36:11 +00:00
parent d31df87f41
commit f93f7b2446
8 changed files with 44 additions and 56 deletions
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lib/VMCore/AutoUpgrade.cpp
+29 -1
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@@ -527,6 +527,12 @@ static bool UpgradeIntrinsicFunction1(Function *F, Function *&NewFn) {
// or 0.
NewFn = 0;
return true;
} else if (Name.compare(5, 16, "x86.sse.loadu.ps", 16) == 0 ||
Name.compare(5, 17, "x86.sse2.loadu.dq", 17) == 0 ||
Name.compare(5, 17, "x86.sse2.loadu.pd", 17) == 0) {
// Calls to these instructions are transformed into unaligned loads.
NewFn = 0;
return true;
} else if (Name.compare(5, 17, "x86.ssse3.pshuf.w", 17) == 0) {
// This is an SSE/MMX instruction.
const Type *X86_MMXTy = VectorType::getX86_MMXTy(FTy->getContext());
@@ -946,7 +952,29 @@ void llvm::UpgradeIntrinsicCall(CallInst *CI, Function *NewFn) {
// Remove upgraded instruction.
CI->eraseFromParent();
} else if (F->getName() == "llvm.x86.sse.loadu.ps" ||
F->getName() == "llvm.x86.sse2.loadu.dq" ||
F->getName() == "llvm.x86.sse2.loadu.pd") {
// Convert to a native, unaligned load.
const Type *VecTy = CI->getType();
const Type *IntTy = IntegerType::get(C, 128);
IRBuilder<> Builder(C);
Builder.SetInsertPoint(CI->getParent(), CI);
Value *BC = Builder.CreateBitCast(CI->getArgOperand(0),
PointerType::getUnqual(IntTy),
"cast");
LoadInst *LI = Builder.CreateLoad(BC, CI->getName());
LI->setAlignment(1); // Unaligned load.
BC = Builder.CreateBitCast(LI, VecTy, "new.cast");
// Fix up all the uses with our new load.
if (!CI->use_empty())
CI->replaceAllUsesWith(BC);
// Remove intrinsic.
CI->eraseFromParent();
} else {
llvm_unreachable("Unknown function for CallInst upgrade.");
}