[llvm-commits] [llvm] r42132 - /llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp

[Duncan Sands]

Author: baldrick
Date: Wed Sep 19 05:25:38 2007
New Revision: 42132

URL: http://llvm.org/viewvc/llvm-project?rev=42132&view=rev
Log:
Improve comment.

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

Modified: llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp?rev=42132&r1=42131&r2=42132&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp Wed Sep 19 05:25:38 2007
@@ -8939,8 +8939,9 @@
   // If it is an alloca it is always safe to load from.
   if (isa<AllocaInst>(V)) return true;
 
-  // Don't try to evaluate aliases.  External weak GV can be null.
+  // If it is a global variable it is mostly safe to load from.
   if (const GlobalValue *GV = dyn_cast<GlobalVariable>(V))
+    // Don't try to evaluate aliases.  External weak GV can be null.
     return !isa<GlobalAlias>(GV) && !GV->hasExternalWeakLinkage();
 
   // Otherwise, be a little bit agressive by scanning the local block where we