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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2011-01-17 12:04:57 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2011-01-17 12:04:57 +0000 |
| commit | d8228924556d3c465da5b858c620b29fd1cf298e (patch) | |
| tree | 76f23c5534b12780db45975b1f85f6f077fc77b6 /lib/VMCore/User.cpp | |
| parent | 8702e8be8df5f2ba12ecc89580d5e7453a1a39cd (diff) | |
Add a DAGCombine to turn (ctpop x) u< 2 into (x & x-1) == 0.
This shaves off 4 popcounts from the hacked 186.crafty source.
This is enabled even when a native popcount instruction is available. The
combined code is one operation longer but it should be faster nevertheless.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123621 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/VMCore/User.cpp')
0 files changed, 0 insertions, 0 deletions