diff options
Diffstat (limited to 'lib/Transforms/Utils/BasicBlockUtils.cpp')
| -rw-r--r-- | lib/Transforms/Utils/BasicBlockUtils.cpp | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp index a5137e9..72db980 100644 --- a/lib/Transforms/Utils/BasicBlockUtils.cpp +++ b/lib/Transforms/Utils/BasicBlockUtils.cpp @@ -626,11 +626,17 @@ void llvm::SplitLandingPadPredecessors(BasicBlock *OrigBB, Clone2->setName(Twine("lpad") + Suffix2); NewBB2->getInstList().insert(NewBB2->getFirstInsertionPt(), Clone2); - // Create a PHI node for the two cloned landingpad instructions. - PHINode *PN = PHINode::Create(LPad->getType(), 2, "lpad.phi", LPad); - PN->addIncoming(Clone1, NewBB1); - PN->addIncoming(Clone2, NewBB2); - LPad->replaceAllUsesWith(PN); + // Create a PHI node for the two cloned landingpad instructions only + // if the original landingpad instruction has some uses. + if (!LPad->use_empty()) { + assert(!LPad->getType()->isTokenTy() && + "Split cannot be applied if LPad is token type. Otherwise an " + "invalid PHINode of token type would be created."); + PHINode *PN = PHINode::Create(LPad->getType(), 2, "lpad.phi", LPad); + PN->addIncoming(Clone1, NewBB1); + PN->addIncoming(Clone2, NewBB2); + LPad->replaceAllUsesWith(PN); + } LPad->eraseFromParent(); } else { // There is no second clone. Just replace the landing pad with the first |
