[PATCH] D14788: Fix bug 24715

[Wenxiang Qiu via llvm-commits]

vincentqiuuu created this revision.
vincentqiuuu added a reviewer: joker.eph.
vincentqiuuu added a subscriber: llvm-commits.

Fix for https://llvm.org/bugs/show_bug.cgi?id=24715
Boolean flag Changed in GVN::performPRE(Function &F) is not correctly updated.

http://reviews.llvm.org/D14788

Files:
  lib/Transforms/Scalar/GVN.cpp

Index: lib/Transforms/Scalar/GVN.cpp
===================================================================
--- lib/Transforms/Scalar/GVN.cpp
+++ lib/Transforms/Scalar/GVN.cpp
@@ -2709,7 +2709,7 @@
                               BE = CurrentBlock->end();
          BI != BE;) {
       Instruction *CurInst = &*BI++;
-      Changed = performScalarPRE(CurInst);
+      Changed |= performScalarPRE(CurInst);
     }
   }
 


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