tree e2beb96edef8fe58c7cf2907b61c1fab8dc3ec44
parent 794e74eda55983b5418d122e1047c96bdef9770e
author John Stiles <johnstiles@google.com> 1621460703 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1621465403 +0000

Eliminate unreachable code during optimization.

The Adreno 5xx and 6xx previously failed the SkSLStaticSwitchInline
test; the driver struggled to interpret code with multiple return
statements in a row. We now detect unreachable statements and eliminate
them.

Change-Id: I344d632f2488ca65b0635b37bebffe6e4fb607c5
Bug: skia:12012
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/410256
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>