commit 50898607a9e143042f2a5b6917196eec4dd867b7
author Reid Spencer <rspencer@reidspencer.com> Mon Mar 26 05:25:00 2007 +0000
committer Reid Spencer <rspencer@reidspencer.com> Mon Mar 26 05:25:00 2007 +0000
tree 9b53ed4caf9d60eb2267e95f57582e1905e1fe2f
parent e5866e7b897712580bae1fc3681065b7f5b544ca

For PR1271:
Fix SingleSource/Regression/C/2003-05-21-UnionBitFields.c by changing a
getHighBitsSet call to getLowBitsSet call that was incorrectly converted
from the original lshr constant expression.

llvm-svn: 35348

llvm/lib/Transforms/Scalar/InstructionCombining.cpp

diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
index 0105128..586c7b1 100644
--- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -5858,7 +5858,7 @@
           BinaryOperator::createLShr(X, ConstantInt::get(Ty, ShiftDiff));
         InsertNewInstBefore(Shift, I);
         
-        APInt Mask(APInt::getHighBitsSet(TypeBits, TypeBits - ShiftAmt2));
+        APInt Mask(APInt::getLowBitsSet(TypeBits, ShiftAmt2));
         return BinaryOperator::createAnd(Shift, ConstantInt::get(Mask));
       }