[Bug target/101456] Unnecessary vzeroupper when upper bits of YMM registers already zero
arjan at linux dot intel.com
gcc-bugzilla@gcc.gnu.org
Wed Jul 14 22:59:03 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101456
Arjan van de Ven <arjan at linux dot intel.com> changed:
What |Removed |Added
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CC| |arjan at linux dot intel.com
--- Comment #1 from Arjan van de Ven <arjan at linux dot intel.com> ---
Actually it's not that they're zero (they are) but they're in "init" state
since the vpxor wrote to xmm not ymm
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