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Look at the end of the entry block for an invoke. 

The invoke could be at the end of the entry block. If it's the only one, then we
won't process all of the landingpad instructions correctly. This code is
currently ugly, but should be made much nicer once the new EH switch is thrown.

llvm-svn: 138397
This commit is contained in:
Bill Wendling 2011-08-23 22:20:16 +00:00
parent 4aa4f5dc0a
commit 01a325a40e
1 changed files with 17 additions and 4 deletions
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21
llvm/lib/CodeGen/SjLjEHPrepare.cpp
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@ -389,10 +389,23 @@ bool SjLjEHPass::insertSjLjEHSupport(Function &F) {
SmallVector<CallInst*,16> EH_Exceptions;
SmallVector<Instruction*,16> JmpbufUpdatePoints;
// Note: Skip the entry block since there's nothing there that interests
// us. eh.selector and eh.exception shouldn't ever be there, and we
// want to disregard any allocas that are there.
for (Function::iterator BB = F.begin(), E = F.end(); ++BB != E;) {
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
// Note: Skip the entry block since there's nothing there that interests
// us. eh.selector and eh.exception shouldn't ever be there, and we
// want to disregard any allocas that are there.
//
// FIXME: This is awkward. The new EH scheme won't need to skip the entry
// block.
if (BB == F.begin()) {
if (InvokeInst *II = dyn_cast<InvokeInst>(F.begin()->getTerminator())) {
// FIXME: This will be always non-NULL in the new EH.
if (LandingPadInst *LPI = II->getUnwindDest()->getLandingPadInst())
if (!PersonalityFn) PersonalityFn = LPI->getPersonalityFn();
}
continue;
}
for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
if (CallInst *CI = dyn_cast<CallInst>(I)) {
if (CI->getCalledFunction() == SelectorFn) {