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PruneEH pass incorrectly reports that a change was made

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Reviewed By: reames

Differential Revision: http://reviews.llvm.org/D14097

llvm-svn: 255343
This commit is contained in:
Artur Pilipenko 2015-12-11 16:30:26 +00:00
parent f5a3f4d77c
commit 8b6635b2f6
1 changed files with 7 additions and 12 deletions
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19
lib/Transforms/IPO/PruneEH.cpp
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@ -153,21 +153,16 @@ bool PruneEH::runOnSCC(CallGraphSCC &SCC) {
// If the SCC doesn't unwind or doesn't throw, note this fact.
if (!SCCMightUnwind || !SCCMightReturn)
for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
AttrBuilder NewAttributes;
if (!SCCMightUnwind)
NewAttributes.addAttribute(Attribute::NoUnwind);
if (!SCCMightReturn)
NewAttributes.addAttribute(Attribute::NoReturn);
Function *F = (*I)->getFunction();
const AttributeSet &PAL = F->getAttributes().getFnAttributes();
const AttributeSet &NPAL = AttributeSet::get(
F->getContext(), AttributeSet::FunctionIndex, NewAttributes);
if (PAL != NPAL) {
if (!SCCMightUnwind && !F->hasFnAttribute(Attribute::NoUnwind)) {
F->addFnAttr(Attribute::NoUnwind);
MadeChange = true;
}
if (!SCCMightReturn && !F->hasFnAttribute(Attribute::NoReturn)) {
F->addFnAttr(Attribute::NoReturn);
MadeChange = true;
F->addAttributes(AttributeSet::FunctionIndex, NPAL);
}
}