[Bug target/78132] New: GCC produces invalid instruction (kmovd and kmovq) for KNL.

[vsevolod.livinskij at frtk dot ru]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78132

            Bug ID: 78132
           Summary: GCC produces invalid instruction (kmovd and kmovq) for
                    KNL.
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vsevolod.livinskij at frtk dot ru
  Target Milestone: ---

Created attachment 39909
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39909&action=edit
Reproducer.

GCC produces invalid instruction (kmovd and kmovq) for KNL. The reproducer for
kmovq was attached, but I there is exist similar error for kmovd.

Reproducer:
unsigned short c;
char a, d, f, b;
short e;
long g;
int main() {
  g = c;
  f = c & e;
  d = c & a | e;
  if (a)
    b = c;
}

GCC version:
>$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/home/vlivinsk/workspace/gcc-dev/bin-trunk/libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/vlivinsk/workspace/gcc-dev/trunk/configure
--prefix=/home/vlivinsk/workspace/gcc-dev/bin-trunk
Thread model: posix
gcc version 7.0.0 20161026 (experimental) (GCC)

Error:
>$ g++ -O3 -march=knl small.cpp
>$ sde -knl -- ./a.out
TID 0 SDE-ERROR: Executed instruction not valid for specified chip (KNL):
0x400436: kmovq k0, rax
Image: a.out+0x436 (in multi-region image, region# 0)
Function: main
Instruction bytes are: c4 e1 fb 92 c0