[Bug target/82430] [5/6/7/8 Regression] Suboptimal code generated because of unnecessary "pxor xmm0, xmm0"

jakub at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Wed Oct 4 15:11:00 GMT 2017


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82430

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |uros at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Oops, no, that change only changed xorpd into pxor.  The actual change that
introduced the xoring was r201308, aka PR57954 and PR57988.
So can you explain why you think the xors aren't necessary to avoid partial sse
dependency stalls?


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