commit 335597f31b7359b17a9429f049589226db523398
author Craig Topper <craig.topper@gmail.com> Sat Apr 29 17:46:13 2017 +0000
committer Craig Topper <craig.topper@gmail.com> Sat Apr 29 17:46:13 2017 +0000
tree 9e7614b4aee0718525ceb2ef0e3ced140c64bbcd
parent 685327dd99fbbc08c9243ca41e874eccf31778e4

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

llvm-svn: 301752

llvm/lib/IR/ConstantRange.cpp

diff --git a/llvm/lib/IR/ConstantRange.cpp b/llvm/lib/IR/ConstantRange.cpp
index 754844e..8b595a6 100644
--- a/llvm/lib/IR/ConstantRange.cpp
+++ b/llvm/lib/IR/ConstantRange.cpp
@@ -569,9 +569,8 @@
   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);