[llvm-commits] [llvm] r44293 - /llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp

[Chris Lattner]

Author: lattner
Date: Fri Nov 23 16:35:18 2007
New Revision: 44293

URL: http://llvm.org/viewvc/llvm-project?rev=44293&view=rev
Log:
add a 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=44293&r1=44292&r2=44293&view=diff

==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/InstructionCombining.cpp Fri Nov 23 
16:35:18 2007
@@ -2660,7 +2660,7 @@
     if (ConstantInt *RHS = dyn_cast<ConstantInt>(I->getOperand(1))) {
       // X & 0xFFF0 is known to be a multiple of 16.
       uint32_t Zeros = RHS->getValue().countTrailingZeros();
-      if (Zeros != V->getType()->getPrimitiveSizeInBits())
+      if (Zeros != V->getType()->getPrimitiveSizeInBits())// don't shift by 
"32"
         return ConstantExpr::getShl(Result, 
                                     ConstantInt::get(Result->getType(), 
Zeros));
     }


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