Utils/LoopUnroll.cpp: Tweak (StringRef)OldName to be valid until it is used, since r194601.
eraseFromParent() invalidates OldName.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194970 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/LoopUnroll.cpp b/lib/Transforms/Utils/LoopUnroll.cpp
index 9955bfd..162807d 100644
--- a/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/lib/Transforms/Utils/LoopUnroll.cpp
@@ -90,6 +90,7 @@
// Move all definitions in the successor to the predecessor...
OnlyPred->getInstList().splice(OnlyPred->end(), BB->getInstList());
+ // OldName will be valid until erased.
StringRef OldName = BB->getName();
// Erase basic block from the function...
@@ -102,12 +103,13 @@
}
}
LI->removeBlock(BB);
- BB->eraseFromParent();
// Inherit predecessor's name if it exists...
if (!OldName.empty() && !OnlyPred->hasName())
OnlyPred->setName(OldName);
+ BB->eraseFromParent();
+
return OnlyPred;
}