[Bug testsuite/50485] gcc.target/i386/sse4_1-blendps.c fails spuriously on i686

mkuvyrkov at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Wed Sep 28 07:31:00 GMT 2011


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50485

Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> changed:

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--- Comment #6 from Maxim Kuvyrkov <mkuvyrkov at gcc dot gnu.org> 2011-09-28 00:10:25 UTC ---
I'm also getting this failure with yesterday mainline.  

Isn't the problem here that SRC3 is used uninitialized in _mm_blend_ps? 

The test case is buggy, and Tom's patch initializes SRC3 to a value that
triggers the bug reliably.  I really want to fix this to avoid someone else
(beyond Tom, Andrew and myself) wasting their time on debugging a
non-deterministic test case.

H.J., as you the author of the test case, would you please look into what
changes are need to fix it?  Is it intended that SRC3.X is used uninitialized?

Thank you.



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