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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-11 16:05:50 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-07-11 16:05:50 +0000 |
| commit | 0a230e0d985625a3909cb78fd867a3abaf434565 (patch) | |
| tree | 5781d89cdddab939dca31f5f5a62c2a1f825b22f /lib/Support/ConstantRange.cpp | |
| parent | 1b3e3eef1fb51ace32b32e5ca217dacb03333b13 (diff) | |
| download | external_llvm-0a230e0d985625a3909cb78fd867a3abaf434565.zip external_llvm-0a230e0d985625a3909cb78fd867a3abaf434565.tar.gz external_llvm-0a230e0d985625a3909cb78fd867a3abaf434565.tar.bz2 | |
Don't use a potentially expensive shift if all we want is one set bit.
No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186095 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/ConstantRange.cpp')
| -rw-r--r-- | lib/Support/ConstantRange.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Support/ConstantRange.cpp b/lib/Support/ConstantRange.cpp index d770381..bb38cd1 100644 --- a/lib/Support/ConstantRange.cpp +++ b/lib/Support/ConstantRange.cpp @@ -433,7 +433,7 @@ ConstantRange ConstantRange::zeroExtend(uint32_t DstTySize) const { APInt LowerExt(DstTySize, 0); if (!Upper) // special case: [X, 0) -- not really wrapping around LowerExt = Lower.zext(DstTySize); - return ConstantRange(LowerExt, APInt(DstTySize, 1).shl(SrcTySize)); + return ConstantRange(LowerExt, APInt::getOneBitSet(DstTySize, SrcTySize)); } return ConstantRange(Lower.zext(DstTySize), Upper.zext(DstTySize)); |