[LoopSimplify] Preserve LCSSA when removing edges from unreachable blocks.
This fixes PR30454.
llvm-svn: 287379
diff --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
index d24c1c4..00cda2a 100644
--- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
@@ -530,7 +530,7 @@
// Zap the dead pred's terminator and replace it with unreachable.
TerminatorInst *TI = P->getTerminator();
- changeToUnreachable(TI, /*UseLLVMTrap=*/false);
+ changeToUnreachable(TI, /*UseLLVMTrap=*/false, PreserveLCSSA);
Changed = true;
}
}