[Bug target/70728] New: GCC trunk emits invalid assembly for knl target

["anton.mitrokhin at phystech dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70728

            Bug ID: 70728
           Summary: GCC trunk emits invalid assembly for knl target
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anton.mitrokhin at phystech dot edu
  Target Milestone: ---

Created attachment 38308
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38308&action=edit
Reproducer

Reproducer:
> g++ -std=c++11 -Ofast -march=knl -o out small.cpp
> sde âknl -- out


Output:
TID 0 SDE-ERROR: Executed instruction not valid for specified chip (KNL):
0x40084b: vpslld xmm8, xmm8, xmm16
Image: /export/users/amitrokh/forCreduce/untracked/knl_vpslld/out+0x84b (in
multi-region image, region# 0)
Function: _Z3fn1v
Instruction bytes are: 62 31 3d 08 f2 c0


> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fpmath=sse --with-pkgversion=Revision=235172/svn-rev:235172/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160418 (experimental) (Revision=235172/svn-rev:235172/)