| commit | 5ae02268bec405347312b2d912cb6fa5e179704b | [log] [tgz] |
|---|---|---|
| author | mtrofin <mtrofin@chromium.org> | Tue Feb 23 07:52:52 2016 |
| committer | Commit bot <commit-bot@chromium.org> | Tue Feb 23 07:53:49 2016 |
| tree | 8cefa7369f31c64bc3788afd7a0d15938db72fab | |
| parent | 7e805faa30ca258cc62fca07f3e1f73026eb0401 [diff] |
[turbofan] fix validator in face of phi optimizations. This fixes an issue encountered in wasm payloads, where we do not (yet) optimize away duplicate phi definitions - phis in the same block with the same operand list; and when move optimizations merge phi- defining moves into the block defining the phi. If all this happens, the register allocation validator back-propagation fails because it can't distinguish the duplicate phis, when traversing backwards. BUG= Review URL: https://codereview.chromium.org/1720003002 Cr-Commit-Position: refs/heads/master@{#34207}
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