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[Bug gas/24352] Incorrect EVEX optimization

From: cvs-commit at gcc dot gnu.org
Subject: [Bug gas/24352] Incorrect EVEX optimization
Date: Tue, 19 Mar 2019 13:12:25 +0000


--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by H.J. Lu <address@hidden>:


commit 7b1d7ca194544554f7d41aea7fdf7a69c232f15d
Author: H.J. Lu <address@hidden>
Date:   Tue Mar 19 21:10:21 2019 +0800

    x86: Correct EVEX to 128-bit EVEX optimization

    Since not all AVX512F processors support AVX512VL, we can optimize
    512-bit EVEX to 128-bit EVEX encoding for upper 16 vector registers
    only when AVX512VL is enabled explicitly at command-line or via
    ".arch .avx512vl" directive.

        PR gas/24352
        * config/tc-i386.c (optimize_encoding): Check only
        * testsuite/gas/i386/i386.exp: Run x86-64-optimize-2b.
        * testsuite/gas/i386/x86-64-optimize-2.d: Revert the last
        * testsuite/gas/i386/x86-64-optimize-2b.d: New file.
        * testsuite/gas/i386/x86-64-optimize-2b.s: Likewise.

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