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-rw-r--r--llvm/lib/Transforms/Utils/Local.cpp4
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index 1e3ef68..f89d36f 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -3857,6 +3857,10 @@ bool llvm::canReplaceOperandWithVariable(const Instruction *I, unsigned OpIdx) {
if (Op->isSwiftError())
return false;
+ // Cannot replace alloca argument with phi/select.
+ if (I->isLifetimeStartOrEnd())
+ return false;
+
// Early exit.
if (!isa<Constant, InlineAsm>(Op))
return true;