| commit | 099fda09dab33074a05a5340e83eee961cf768dd | [log] [tgz] |
|---|---|---|
| author | Clemens Backes <clemensb@chromium.org> | Wed Jul 08 15:35:29 2020 |
| committer | Commit Bot <commit-bot@chromium.org> | Mon Jul 13 09:22:29 2020 |
| tree | fa3814748189411a4f1fc4e381ba93b4563fc1e0 | |
| parent | 3505cf00eb4c59b87f4b5ec9fc702f7935fdffd0 [diff] |
Merged: [liftoff] Handle unordered register pairs
For 64-bit binary operations, Liftoff on arm made the assumption that
register pairs are always ordered, i.e. the register code for the low
word is lower than the register code for the high word.
Ensuring this was only implemented in {GetUnusedRegister} in
https://crrev.com/c/2168875. Other cases were missing though, e.g.
return values, but also different places were we
construct register pairs internally.
Thus, this CL removes this constraint again and instead handles
unordered register pairs in 64-bit binary operations on arm.
TBR=thibaudm@chromium.org
(cherry picked from commit b429b8f92488fc940dccafd740633a75772e8741)
Bug: chromium:1101304
No-Try: true
No-Tree-Checks: true
No-Presubmit: true
Change-Id: Iecca3b4bec04a47c681f30bd0ac7bbe2348cdccb
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2292243
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/branch-heads/8.5@{#16}
Cr-Branched-From: a7f8bc434b35c3122a859f094fa541febd74ec7c-refs/heads/8.5.210@{#1}
Cr-Branched-From: dd58472158b209e36f3f8646e9adfb31ffa61483-refs/heads/master@{#68510}
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