[llvm-bugs] [Bug 28568] New: polly optimizer causes opus tests in ffmpeg to fail

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28568

            Bug ID: 28568
           Summary: polly optimizer causes opus tests in ffmpeg to fail
           Product: Polly
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Optimizer
          Assignee: polly-dev at googlegroups.com
          Reporter: jeremyhu at apple.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

Check out http://fate.ffmpeg.org/?query=os:darwin//&sort=cc

Recent llvm trunk is failing a few tests when ffmpeg is compiled with:
-O3 -polly -polly-vectorizer=stripmine
or
-O3 -polly

Disabling the optimizer causes the tests to pass:
-O3 -polly -polly-optimizer=none

The failing tests are:

opus-testvector01
opus-testvector05
opus-testvector06
opus-testvector07
opus-testvector08
opus-testvector09
opus-testvector10
opus-testvector11
opus-tron.6ch.tinypkts

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