diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/LoopSimplify.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/LoopSimplify.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp index 26b59ad57df..36e2fea63dc 100644 --- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp +++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp @@ -622,8 +622,10 @@ ReprocessLoop: (PN = dyn_cast<PHINode>(I++)); ) if (Value *V = SimplifyInstruction(PN, DL, nullptr, DT, AC)) { if (SE) SE->forgetValue(PN); - PN->replaceAllUsesWith(V); - PN->eraseFromParent(); + if (!PreserveLCSSA || LI->replacementPreservesLCSSAForm(PN, V)) { + PN->replaceAllUsesWith(V); + PN->eraseFromParent(); + } } // If this loop has multiple exits and the exits all go to the same |
