[llvm] r301752 - [ConstantRange] Replace getMaxValue+zext with getLowBitsSet. Replace zero-init+setBit with getOneBitSet. NFC

[Craig Topper via llvm-commits]

Author: ctopper
Date: Sat Apr 29 12:46:13 2017
New Revision: 301752

URL: http://llvm.org/viewvc/llvm-project?rev=301752&view=rev
Log:
[ConstantRange] Replace getMaxValue+zext with getLowBitsSet. Replace zero-init+setBit with getOneBitSet. NFC

Modified:
    llvm/trunk/lib/IR/ConstantRange.cpp

Modified: llvm/trunk/lib/IR/ConstantRange.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/ConstantRange.cpp?rev=301752&r1=301751&r2=301752&view=diff
==============================================================================
--- llvm/trunk/lib/IR/ConstantRange.cpp (original)
+++ llvm/trunk/lib/IR/ConstantRange.cpp Sat Apr 29 12:46:13 2017
@@ -569,9 +569,8 @@ ConstantRange ConstantRange::truncate(ui
   if (isFullSet())
     return ConstantRange(DstTySize, /*isFullSet=*/true);
 
-  APInt MaxValue = APInt::getMaxValue(DstTySize).zext(getBitWidth());
-  APInt MaxBitValue(getBitWidth(), 0);
-  MaxBitValue.setBit(DstTySize);
+  APInt MaxValue = APInt::getLowBitsSet(getBitWidth(), DstTySize);
+  APInt MaxBitValue = APInt::getOneBitSet(getBitWidth(), DstTySize);
 
   APInt LowerDiv(Lower), UpperDiv(Upper);
   ConstantRange Union(DstTySize, /*isFullSet=*/false);