[CodeGen] Fix AtomicExpand invalidation issue caused by r247429.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247514 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/AtomicExpandPass.cpp b/lib/CodeGen/AtomicExpandPass.cpp
index 2c2a08fbb5aafef1b8b49689d8e4b58e5583a94b..73102ccfece1006a23f2708a5f14e403b3380c45 100644 (file)
--- a/lib/CodeGen/AtomicExpandPass.cpp
+++ b/lib/CodeGen/AtomicExpandPass.cpp
@@ -505,8 +505,10 @@ bool AtomicExpand::isIdempotentRMW(AtomicRMWInst* RMWI) {
 }
 
 bool AtomicExpand::simplifyIdempotentRMW(AtomicRMWInst* RMWI) {
-  if (auto ResultingLoad = TLI->lowerIdempotentRMWIntoFencedLoad(RMWI))
-    return tryExpandAtomicLoad(ResultingLoad);
+  if (auto ResultingLoad = TLI->lowerIdempotentRMWIntoFencedLoad(RMWI)) {
+    tryExpandAtomicLoad(ResultingLoad);
+    return true;
+  }
   return false;
 }