| commit | e84178a0bd3a218238b15ef646f2e740f3a48037 | [log] [tgz] |
|---|---|---|
| author | Owen Anderson <resistor@mac.com> | Wed Jul 14 19:52:16 2010 +0000 |
| committer | Owen Anderson <resistor@mac.com> | Wed Jul 14 19:52:16 2010 +0000 |
| tree | 0112af403b30e3ebed1b7362b6efd9e682494c78 | |
| parent | 834480374ba38b2a31d6b63b492e442d75a462cf [diff] |
Extend SimplifyCFG's common-destination folding heuristic to allow a single "bonus" instruction to be speculatively executed. Add a heuristic to ensure we're not tripping up out-of-order execution by checking that this bonus instruction only uses values that were already guaranteed to be available. This allows us to eliminate the short circuit in (x&1)&&(x&2). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108351 91177308-0d34-0410-b5e6-96231b3b80d8