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[NFC][MSAN] Extract llvm.abs handling into a function

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Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D88519
This commit is contained in:
Vitaly Buka 2020-09-29 14:55:46 -07:00
parent 3482300416
commit dd7abb8112
1 changed files with 16 additions and 6 deletions
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22
lib/Transforms/Instrumentation/MemorySanitizer.cpp
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@ -2638,12 +2638,6 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
return false;
unsigned NumArgOperands = I.getNumArgOperands();
if (I.getIntrinsicID() == Intrinsic::abs) {
assert(NumArgOperands == 2);
// The last argument is just a boolean flag.
NumArgOperands = 1;
}
for (unsigned i = 0; i < NumArgOperands; ++i) {
Type *Ty = I.getArgOperand(i)->getType();
if (Ty != RetTy)
@ -3236,8 +3230,24 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
setOriginForNaryOp(I);
}
// Instrument abs intrinsic.
// handleUnknownIntrinsic can't handle it because of the last
// is_int_min_poison argument which does not match the result type.
void handleAbsIntrinsic(IntrinsicInst &I) {
assert(I.getType()->isIntOrIntVectorTy());
assert(I.getArgOperand(0)->getType() == I.getType());
// FIXME: Handle is_int_min_poison.
IRBuilder<> IRB(&I);
setShadow(&I, getShadow(&I, 0));
setOrigin(&I, getOrigin(&I, 0));
}
void visitIntrinsicInst(IntrinsicInst &I) {
switch (I.getIntrinsicID()) {
case Intrinsic::abs:
handleAbsIntrinsic(I);
break;
case Intrinsic::lifetime_start:
handleLifetimeStart(I);
break;