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| author | Shuxin Yang <shuxin.llvm@gmail.com> | 2012-11-26 21:44:25 +0000 |
|---|---|---|
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2012-11-26 21:44:25 +0000 |
| commit | b30e256993e075c838ffa1b7af6b04dd28be2c34 (patch) | |
| tree | 91872f135012786c20ce9ccc03aca3c38546b10d /lib/CodeGen/MachineCSE.cpp | |
| parent | ec66ac5318f8546fcb002e1f26063144e224f279 (diff) | |
rdar://12329730 (defect 2)
Enhancement to InstCombine. Try to catch this opportunity:
---------------------------------------------------------------
((X^C1) >> C2) ^ C3 => (X>>C2) ^ ((C1>>C2)^C3)
where the subexpression "X ^ C1" has more than one uses, and
"(X^C1) >> C2" has single use.
----------------------------------------------------------------
Reviewed by Nadav (with minor change per his request).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168615 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineCSE.cpp')
0 files changed, 0 insertions, 0 deletions