diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/LCSSA.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LCSSA.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Utils/LCSSA.cpp b/llvm/lib/Transforms/Utils/LCSSA.cpp index 76f2685..af79dc4 100644 --- a/llvm/lib/Transforms/Utils/LCSSA.cpp +++ b/llvm/lib/Transforms/Utils/LCSSA.cpp @@ -107,13 +107,15 @@ bool llvm::formLCSSAForInstructions(SmallVectorImpl<Instruction *> &Worklist, if (ExitBlocks.empty()) continue; - for (Use &U : I->uses()) { + for (Use &U : make_early_inc_range(I->uses())) { Instruction *User = cast<Instruction>(U.getUser()); BasicBlock *UserBB = User->getParent(); // Skip uses in unreachable blocks. - if (!DT.isReachableFromEntry(UserBB)) + if (!DT.isReachableFromEntry(UserBB)) { + U.set(PoisonValue::get(I->getType())); continue; + } // For practical purposes, we consider that the use in a PHI // occurs in the respective predecessor block. For more info, |