Long GLSL fragment shader causes hang

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A ~2,300 line fragment shader causes the browser's tab to hang when it is 
compiled/linked.  Most of the code should be optimized out so I suspect the 
shader optimizer is in an infinite loop.  With native GL, it compiles and links 
quickly.

This is reproducible on several browsers including Canary 17.0.953.0 and Aurora 
9.0a2.

Please email me, pcozzi@agi.com, for the shader source.

Original issue reported on code.google.com by pjcozzi...@gmail.com on 28 Nov 2011 at 10:29

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This is likely the same problem as that reported in 
http://code.google.com/p/angleproject/issues/detail?id=146 . Please see the 
comments on that issue.

Original comment by kbr@chromium.org on 29 Nov 2011 at 12:33

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I will move the discussion to that issue, but this shader does not have any 
texture lookups.  However, it does use dFdX and dFdY in a loop, which I tried 
unrolling by hand a while back, which did not help.

Original comment by pjcozzi...@gmail.com on 29 Nov 2011 at 6:01

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This should be fixed in r1124. Patrick can you confirm?

Original comment by nicolas....@gmail.com on 1 Jun 2012 at 9:22

• Changed state: Started

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Sure, where can I get a build to test?  Canary is only on revision 1046.

Original comment by pjcozzi...@gmail.com on 26 Jun 2012 at 2:44

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I'll e-mail the latest build for your convenience. You can also build from 
source: http://code.google.com/p/angleproject/wiki/DevSetup

Original comment by nicolas....@gmail.com on 26 Jun 2012 at 4:27

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Canary is now on ANGLE 1164 as well.

Original comment by dan...@transgaming.com on 27 Jun 2012 at 1:27

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Original comment by c...@chromium.org on 7 Dec 2013 at 4:07

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This was confirmed fixed, I believe.

Original comment by c...@chromium.org on 31 Jan 2014 at 8:10

• Changed state: Fixed