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Teach BasicAA to use the size parameter of the memory use marker intrinsics.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2009-10-15 06:12:11 +00:00
parent 549dda9d82
commit 2d3820c29c
1 changed files with 29 additions and 18 deletions
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47
lib/Analysis/BasicAliasAnalysis.cpp
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@ -307,29 +307,40 @@ BasicAliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) {
return NoModRef;
}
if (TD) {
if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CS.getInstruction())) {
switch (II->getIntrinsicID()) {
default: break;
case Intrinsic::atomic_cmp_swap:
case Intrinsic::atomic_swap:
case Intrinsic::atomic_load_add:
case Intrinsic::atomic_load_sub:
case Intrinsic::atomic_load_and:
case Intrinsic::atomic_load_nand:
case Intrinsic::atomic_load_or:
case Intrinsic::atomic_load_xor:
case Intrinsic::atomic_load_max:
case Intrinsic::atomic_load_min:
case Intrinsic::atomic_load_umax:
case Intrinsic::atomic_load_umin: {
if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(CS.getInstruction())) {
switch (II->getIntrinsicID()) {
default: break;
case Intrinsic::atomic_cmp_swap:
case Intrinsic::atomic_swap:
case Intrinsic::atomic_load_add:
case Intrinsic::atomic_load_sub:
case Intrinsic::atomic_load_and:
case Intrinsic::atomic_load_nand:
case Intrinsic::atomic_load_or:
case Intrinsic::atomic_load_xor:
case Intrinsic::atomic_load_max:
case Intrinsic::atomic_load_min:
case Intrinsic::atomic_load_umax:
case Intrinsic::atomic_load_umin:
if (TD) {
Value *Op1 = II->getOperand(1);
unsigned Op1Size = TD->getTypeStoreSize(Op1->getType());
if (alias(Op1, Op1Size, P, Size) == NoAlias)
return NoModRef;
break;
}
}
break;
case Intrinsic::lifetime_start:
case Intrinsic::lifetime_end:
case Intrinsic::invariant_start: {
unsigned PtrSize = cast<ConstantInt>(II->getOperand(1))->getZExtValue();
if (alias(II->getOperand(2), PtrSize, P, Size) == NoAlias)
return NoModRef;
}
case Intrinsic::invariant_end: {
unsigned PtrSize = cast<ConstantInt>(II->getOperand(2))->getZExtValue();
if (alias(II->getOperand(3), PtrSize, P, Size) == NoAlias)
return NoModRef;
}
}
}
}