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
