[llvm-commits] [llvm] r86639 - /llvm/trunk/lib/Transforms/Scalar/JumpThreading.cpp

[Chris Lattner]

Author: lattner
Date: Mon Nov  9 19:19:06 2009
New Revision: 86639

URL: http://llvm.org/viewvc/llvm-project?rev=86639&view=rev
Log:
don't invalidate PN, rewrite of this code is in progress anyway.

Modified:
    llvm/trunk/lib/Transforms/Scalar/JumpThreading.cpp

Modified: llvm/trunk/lib/Transforms/Scalar/JumpThreading.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/JumpThreading.cpp?rev=86639&r1=86638&r2=86639&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/JumpThreading.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/JumpThreading.cpp Mon Nov  9 19:19:06 2009
@@ -223,10 +223,11 @@
       U = PNV;
       
       // See if we can simplify it.
-      if (Value *V = SimplifyInstruction(User, TD)) {
-        User->replaceAllUsesWith(V);
-        User->eraseFromParent();
-      }
+      if (User != PN)
+        if (Value *V = SimplifyInstruction(User, TD)) {
+          User->replaceAllUsesWith(V);
+          User->eraseFromParent();
+        }
     }
     
     PN->replaceAllUsesWith(PNV);