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Refuse to inline two functions which use different personality functions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136269 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-07-27 21:44:28 +00:00
parent f36b0a2ee4
commit 91c56a8d8d
1 changed files with 34 additions and 0 deletions
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34
lib/Transforms/Utils/InlineFunction.cpp
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@ -829,6 +829,40 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI) {
return false;
}
// Find the personality function used by the landing pads of the caller. If it
// exists, then check to see that it matches the personality function used in
// the callee.
for (Function::const_iterator
I = Caller->begin(), E = Caller->end(); I != E; ++I)
if (const InvokeInst *II = dyn_cast<InvokeInst>(I->getTerminator())) {
const BasicBlock *BB = II->getUnwindDest();
// FIXME: This 'isa' here should become go away once the new EH system is
// in place.
if (!isa<LandingPadInst>(BB->getFirstNonPHI()))
continue;
const LandingPadInst *LP = cast<LandingPadInst>(BB->getFirstNonPHI());
const Value *CallerPersFn = LP->getPersonalityFn();
// If the personality functions match, then we can perform the
// inlining. Otherwise, we can't inline.
// TODO: This isn't 100% true. Some personality functions are proper
// supersets of others and can be used in place of the other.
for (Function::const_iterator
I = CalledFunc->begin(), E = CalledFunc->end(); I != E; ++I)
if (const InvokeInst *II = dyn_cast<InvokeInst>(I->getTerminator())) {
const BasicBlock *BB = II->getUnwindDest();
// FIXME: This 'if/dyn_cast' here should become a normal 'cast' once
// the new EH system is in place.
if (const LandingPadInst *LP =
dyn_cast<LandingPadInst>(BB->getFirstNonPHI()))
if (CallerPersFn != LP->getPersonalityFn())
return false;
break;
}
break;
}
// Get an iterator to the last basic block in the function, which will have
// the new function inlined after it.
//