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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 | d873a4b89b365f1e58e808109cd77034517f095d (patch) | |
| tree | 451529a10fe7ee2c369b9f7cf83c6a64e76f24ab /lib/Analysis/ValueTracking.cpp | |
| parent | 131f7d35442416943309af1d13bf4462467181a1 (diff) | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147246 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ValueTracking.cpp')
0 files changed, 0 insertions, 0 deletions