[Bug 77707] [ILK Bisected]Ogles2conform GL_sin_sin_float_frag_xvary.test fails

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon May 12 01:28:25 PDT 2014


https://bugs.freedesktop.org/show_bug.cgi?id=77707

--- Comment #3 from Kenneth Graunke <kenneth at whitecape.org> ---
I would really like to understand the issue - changing from implicit to
explicit seems like it's papering over a bug.  Usually in cases like this, I
try to track down the problem by disabling optimizations and seeing if that
fixes it.

I found out that disabling constant propagation into the MULs that write the
accumulator fixes the problem.  Which is pretty specific.  But the assembly
after the optimization looks just as valid...

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