[IPO/LowerTypesTest] Skip blockaddress(es) when replacing uses.

Blockaddresses refer to the function itself, therefore replacing them
would cause an assertion in doRAUW.

Fixes https://bugs.llvm.org/show_bug.cgi?id=35201

This was found when trying CFI on a proprietary kernel by Dmitry Mikulin.

Differential Revision:  https://reviews.llvm.org/D39695

llvm-svn: 317527

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
index 9fa5ed9ab2b..6cef866b7b8 100644
--- a/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
+++ b/llvm/lib/Transforms/IPO/LowerTypeTests.cpp
@@ -1401,7 +1401,7 @@ void LowerTypeTestsModule::buildBitSetsFromFunctionsNative(
       FAlias->takeName(F);
       if (FAlias->hasName())
         F->setName(FAlias->getName() + ".cfi");
-      F->replaceAllUsesWith(FAlias);
+      F->replaceUsesExceptBlockAddr(FAlias);
     }
     if (!F->isDeclarationForLinker())
       F->setLinkage(GlobalValue::InternalLinkage);