[llvm-commits] [llvm] r89389 - /llvm/trunk/lib/Analysis/CaptureTracking.cpp

[Dan Gohman]

Author: djg
Date: Thu Nov 19 15:34:07 2009
New Revision: 89389

URL: http://llvm.org/viewvc/llvm-project?rev=89389&view=rev
Log:
Comparing a pointer with null is not a capture.

Modified:
    llvm/trunk/lib/Analysis/CaptureTracking.cpp

Modified: llvm/trunk/lib/Analysis/CaptureTracking.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/CaptureTracking.cpp?rev=89389&r1=89388&r2=89389&view=diff

==============================================================================
--- llvm/trunk/lib/Analysis/CaptureTracking.cpp (original)
+++ llvm/trunk/lib/Analysis/CaptureTracking.cpp Thu Nov 19 15:34:07 2009
@@ -98,6 +98,11 @@
           Worklist.push_back(U);
       }
       break;
+    case Instruction::ICmp:
+      // Comparing the pointer against null does not count as a capture.
+      if (isa<ConstantPointerNull>(I->getOperand(1)))
+        break;
+      return true;
     default:
       // Something else - be conservative and say it is captured.
       return true;