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[X86] AMD Zen 3: same-reg AVX YMM VPXOR is a zero-cycle(!) dep-breaking zero-idiom
authorRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 12:48:22 +0000 (15:48 +0300)
committerRoman Lebedev <lebedev.ri@gmail.com>
Fri, 14 May 2021 17:22:59 +0000 (20:22 +0300)
commit1d73c2b8cfa3418ac07f376afb1a30c397d69e49
treec4e8c42d2145b2d453d485fe54013e1fabdce33etree | snapshot
parent31669b50738d3ec0e400ae2b25106b0090f4477bcommit | diff
[X86] AMD Zen 3: same-reg AVX YMM VPXOR is a zero-cycle(!) dep-breaking zero-idiom

As confirmed by exegesis measurements, and ref docs.
llvm/lib/Target/X86/X86ScheduleZnver3.td diff | blob | history
llvm/test/tools/llvm-mca/X86/Znver3/zero-idioms-avx-ymm.s diff | blob | history
Domain: System / Toolchain;