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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-12-24 17:31:46 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-12-24 17:31:46 +0000 |
| commit | 009da05e750b7bac7e1902fcdc85394de4ea63b3 (patch) | |
| tree | 87dc3949e2f937b584c060248a4fcdf271f6427b /lib/Object/ObjectFile.cpp | |
| parent | 1fdfae05b0a4356d1ed0633bf3d6cdc6eba2e173 (diff) | |
ComputeMaskedBits: Make knownzero computation more aggressive for ctlz with undef zero.
unsigned foo(unsigned x) { return 31 - __builtin_clz(x); }
now compiles into a single "bsrl" instruction on x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147255 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Object/ObjectFile.cpp')
0 files changed, 0 insertions, 0 deletions