tree 1a58ab0ce5195b62205a348094e052e5e62479fa
parent bd4a27ff812535cb8480aa1f14109e2c0361e89d
author Tess Strickland <sstrickl@google.com> 1638185184 +0000
committer Commit Bot <commit-bot@chromium.org> 1638185184 +0000

[vm/compiler] Resolve sentinel comparisons when possible.

For StrictCompare instructions where one side is the sentinel value and
the other side has a CompileType that cannot be the sentinel, propagate
a false (if EQ_STRICT) or true (if NE_STRICT) constant for that
comparison.

TEST=vm/cc/ConstantPropagator_StrictCompare

Change-Id: I96e4bde1a02fa841987964491c5fff176fdf82a6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/220769
Commit-Queue: Tess Strickland <sstrickl@google.com>
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>