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| author | Chandler Carruth <chandlerc@gmail.com> | 2011-12-24 11:11:38 +0000 |
|---|---|---|
| committer | Chandler Carruth <chandlerc@gmail.com> | 2011-12-24 11:11:38 +0000 |
| commit | c9fcde23476ab293cb8d319782176d0a77a72fff (patch) | |
| tree | e7bb61b3008b74be8e768d20b264966fa728787b /llvm/test/CodeGen/X86/clz.ll | |
| parent | eeb3a1ce3ed2409d4d1ab0dc1f612512a94dd84e (diff) | |
| download | bcm5719-llvm-c9fcde23476ab293cb8d319782176d0a77a72fff.tar.gz bcm5719-llvm-c9fcde23476ab293cb8d319782176d0a77a72fff.zip | |
Expand more when we have a nice 'tzcnt' instruction, to avoid generating
'bsf' instructions here.
This one is actually debatable to my eyes. It's not clear that any chip
implementing 'tzcnt' would have a slow 'bsf' for any reason, and unless
EFLAGS or a zero input matters, 'tzcnt' is just a longer encoding.
Still, this restores the old behavior with 'tzcnt' enabled for now.
llvm-svn: 147246
Diffstat (limited to 'llvm/test/CodeGen/X86/clz.ll')
0 files changed, 0 insertions, 0 deletions
