[Mesa-dev] [Bug 105699] s3tc fbo-generatemipmap-formats tests fail unless optimized

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105699

            Bug ID: 105699
           Summary: s3tc fbo-generatemipmap-formats tests fail unless
                    optimized
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: sroland at vmware.com
          Reporter: mark.a.janes at intel.com
        QA Contact: mesa-dev at lists.freedesktop.org

The following piglit tests fail on all Intel hardware, with -O0:

    piglit.spec.ext_texture_compression_s3tc.fbo-generatemipmap-formats
    piglit.spec.ext_texture_srgb.fbo-generatemipmap-formats-s3tc

EG:
piglit/bin/fbo-generatemipmap-formats GL_EXT_texture_compression_s3tc -auto
-fbo
Using test set: GL_EXT_texture_compression_s3tc
Testing GL_COMPRESSED_RGB_S3TC_DXT1_EXT
PIGLIT: {"subtest": {"GL_COMPRESSED_RGB_S3TC_DXT1_EXT" : "pass"}}
Testing GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
PIGLIT: {"subtest": {"GL_COMPRESSED_RGBA_S3TC_DXT1_EXT" : "pass"}}
Testing GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
PIGLIT: {"subtest": {"GL_COMPRESSED_RGBA_S3TC_DXT3_EXT" : "pass"}}
Testing GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
PIGLIT: {"subtest": {"GL_COMPRESSED_RGBA_S3TC_DXT5_EXT" : "pass"}}
Testing GL_COMPRESSED_RGB_S3TC_DXT1_EXT (NPOT)
PIGLIT: {"subtest": {"GL_COMPRESSED_RGB_S3TC_DXT1_EXT NPOT" : "pass"}}
Testing GL_COMPRESSED_RGBA_S3TC_DXT1_EXT (NPOT)
PIGLIT: {"subtest": {"GL_COMPRESSED_RGBA_S3TC_DXT1_EXT NPOT" : "pass"}}
Testing GL_COMPRESSED_RGBA_S3TC_DXT3_EXT (NPOT)
PIGLIT: {"subtest": {"GL_COMPRESSED_RGBA_S3TC_DXT3_EXT NPOT" : "pass"}}
Testing GL_COMPRESSED_RGBA_S3TC_DXT5_EXT (NPOT)
Probe color at (439,4)
  Expected: 0 255 0 63
  Observed: 0 255 0 255
PIGLIT: {"subtest": {"GL_COMPRESSED_RGBA_S3TC_DXT5_EXT NPOT" : "fail"}}
PIGLIT: {"result": "fail" }

When Mesa is compiled with -O2, the tests pass.

You would expect optimizations to *break* tests, not fix them.  ¯\_(ツ)_/¯

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