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| author | Manman Ren <mren@apple.com> | 2012-08-08 00:51:41 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-08-08 00:51:41 +0000 |
| commit | 1be131ba275b33e674d09fc84a5ae5f4f27c8e15 (patch) | |
| tree | 6b33a47ea0287c903e15ccbe3583859a54a1cea4 /llvm/lib/CodeGen/MachineBranchProbabilityInfo.cpp | |
| parent | 3b9a4428416566bca21fd43cfbaeeb566465b5d4 (diff) | |
| download | bcm5719-llvm-1be131ba275b33e674d09fc84a5ae5f4f27c8e15.tar.gz bcm5719-llvm-1be131ba275b33e674d09fc84a5ae5f4f27c8e15.zip | |
X86: enable CSE between CMP and SUB
We perform the following:
1> Use SUB instead of CMP for i8,i16,i32 and i64 in ISel lowering.
2> Modify MachineCSE to correctly handle implicit defs.
3> Convert SUB back to CMP if possible at peephole.
Removed pattern matching of (a>b) ? (a-b):0 and like, since they are handled
by peephole now.
rdar://11873276
llvm-svn: 161462
Diffstat (limited to 'llvm/lib/CodeGen/MachineBranchProbabilityInfo.cpp')
0 files changed, 0 insertions, 0 deletions
