[llvm-commits] [llvm] r41819 - /llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp

[Chris Lattner]

Author: lattner
Date: Mon Sep 10 18:46:29 2007
New Revision: 41819

URL: http://llvm.org/viewvc/llvm-project?rev=41819&view=rev
Log:
remove some dead code, this is handled by constant folding.

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=41819&r1=41818&r2=41819&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp Mon Sep 10 18:46:29 2007
@@ -4691,14 +4691,6 @@
   if (isa<UndefValue>(Op1))                  // X icmp undef -> undef
     return ReplaceInstUsesWith(I, UndefValue::get(Type::Int1Ty));
 
-  // icmp of GlobalValues can never equal each other as long as they aren't
-  // external weak linkage type.
-  if (GlobalValue *GV0 = dyn_cast<GlobalValue>(Op0))
-    if (GlobalValue *GV1 = dyn_cast<GlobalValue>(Op1))
-      if (!GV0->hasExternalWeakLinkage() || !GV1->hasExternalWeakLinkage())
-        return ReplaceInstUsesWith(I, ConstantInt::get(Type::Int1Ty,
-                                                       !isTrueWhenEqual(I)));
-
   // icmp <global/alloca*/null>, <global/alloca*/null> - Global/Stack value
   // addresses never equal each other!  We already know that Op0 != Op1.
   if ((isa<GlobalValue>(Op0) || isa<AllocaInst>(Op0) ||
@@ -6399,6 +6391,7 @@
     // of casts in the input.
     if (I->getOpcode() == CastOpc)
       return true;
+    
     break;
   default:
     // TODO: Can handle more cases here.