diff options
| -rw-r--r-- | include/llvm/Analysis/LoopInfo.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/Analysis/LoopInfo.h b/include/llvm/Analysis/LoopInfo.h index 612b7b8cc4..a35b125d6f 100644 --- a/include/llvm/Analysis/LoopInfo.h +++ b/include/llvm/Analysis/LoopInfo.h @@ -1029,6 +1029,10 @@ public: // instruction. Instruction *I = dyn_cast<Instruction>(To); if (!I) return true; + // If both instructions are defined in the same basic block then replacement + // cannot break LCSSA form. + if (I->getParent() == From->getParent()) + return true; // If the instruction is not defined in a loop then it can safely replace // anything. Loop *ToLoop = getLoopFor(I->getParent()); |