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Mark calls to llvm.stacksave, llvm.stackrestore as

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nounwind.  When such calls are inlined into something
else that is invoked, they were getting changed to invokes,
which is badness.

llvm-svn: 49299
This commit is contained in:
Dale Johannesen 2008-04-07 00:08:48 +00:00
parent 5a1f254f0a
commit 5c2c09c01b
1 changed files with 4 additions and 1 deletions
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5
lib/Transforms/Utils/InlineFunction.cpp
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@ -368,12 +368,14 @@ bool llvm::InlineFunction(CallSite CS, CallGraph *CG, const TargetData *TD) {
// Insert the llvm.stacksave.
CallInst *SavedPtr = CallInst::Create(StackSave, "savedstack",
FirstNewBlock->begin());
SavedPtr->setDoesNotThrow();
if (CG) CallerNode->addCalledFunction(SavedPtr, StackSaveCGN);
// Insert a call to llvm.stackrestore before any return instructions in the
// inlined function.
for (unsigned i = 0, e = Returns.size(); i != e; ++i) {
CallInst *CI = CallInst::Create(StackRestore, SavedPtr, "", Returns[i]);
CI->setDoesNotThrow();
if (CG) CallerNode->addCalledFunction(CI, StackRestoreCGN);
}
@ -386,7 +388,8 @@ bool llvm::InlineFunction(CallSite CS, CallGraph *CG, const TargetData *TD) {
for (Function::iterator BB = FirstNewBlock, E = Caller->end();
BB != E; ++BB)
if (UnwindInst *UI = dyn_cast<UnwindInst>(BB->getTerminator())) {
CallInst::Create(StackRestore, SavedPtr, "", UI);
CallInst *CI = CallInst::Create(StackRestore, SavedPtr, "", UI);
CI->setDoesNotThrow();
++NumStackRestores;
}
}