[Bug target/81590] New: AVX512 run-time test failures

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81590

            Bug ID: 81590
           Summary: AVX512 run-time test failures
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: pavel.v.chupin at gmail dot com
  Target Milestone: ---
            Target: x86-64

On Skylake server running Fedora 25/x86-64, r250630 gave:

FAIL: gcc.target/i386/avx512vl-vpermb-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpermi2b-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpermt2b-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpmaddhuq-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpmaddluq-2.c execution test
FAIL: gcc.target/i386/avx512vl-vpmultishiftqb-2.c execution test
FAIL: libgomp.c/for-3.c execution test
FAIL: libgomp.c/for-5.c execution test
FAIL: libgomp.fortran/target7.f90   -O0  execution test
FAIL: libgomp.fortran/target7.f90   -O1  execution test
FAIL: libgomp.fortran/target7.f90   -O2  execution test
FAIL: libgomp.fortran/target7.f90   -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions  execution test
FAIL: libgomp.fortran/target7.f90   -O3 -g  execution test
FAIL: libgomp.fortran/target7.f90   -Os  execution test
FAIL: libgomp.fortran/target8.f90   -O0  execution test
FAIL: libgomp.fortran/target8.f90   -O1  execution test
FAIL: libgomp.fortran/target8.f90   -O2  execution test
FAIL: libgomp.fortran/target8.f90   -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions  execution test
FAIL: libgomp.fortran/target8.f90   -O3 -g  execution test
FAIL: libgomp.fortran/target8.f90   -Os  execution test

[hlu@gkliclel217 testsuite]$ gdb ./avx512vl-vpermb-2.exeGNU gdb (GDB) Fedora
7.12.1-48.fc25
Copyright (C) 2017 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
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For help, type "help".
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Reading symbols from ./avx512vl-vpermb-2.exe...done.
(gdb) r
Starting program:
/export/users/hjl/build/gcc/build-x86_64-linux/gcc/testsuite/avx512vl-vpermb-2.exe 
Missing separate debuginfos, use: dnf debuginfo-install
glibc-2.24-9.fc25.x86_64

Program received signal SIGILL, Illegal instruction.
test_256 ()
    at
/export/users/hjl/git/gcc/gcc/testsuite/gcc.target/i386/avx512vbmi-vpermb-2.c:38
38        res1.x = INTRINSIC (_permutexvar_epi8) (s1.x, s2.x);
(gdb) bt
#0  test_256 ()
    at
/export/users/hjl/git/gcc/gcc/testsuite/gcc.target/i386/avx512vbmi-vpermb-2.c:38
#1  0x000000000040090b in avx512vl_test ()
    at
/export/users/hjl/git/gcc/gcc/testsuite/gcc.target/i386/avx512f-helper.h:154
#2  do_test ()
    at
/export/users/hjl/git/gcc/gcc/testsuite/gcc.target/i386/avx512vl-check.h:10
#3  0x000000000040044a in main ()
    at
/export/users/hjl/git/gcc/gcc/testsuite/gcc.target/i386/avx512vl-check.h:31
(gdb)