[Bug debug/126662] FAIL: gcc.dg/guality/pr36728-1.c -O1 -DPREVENT_OPTIMIZATION line 16 arg5 == 5

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126662

--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> ---
On x86_64, there are some similar fails:
spawn gdb -nx -nw -quiet -batch -x pr36728-2.gdb pr36728-2.exe
Breakpoint 1 at 0x401145: file
/home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/guali
ty/pr36728-2.c, line 16.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Breakpoint 1, foo (arg7=<optimized out>, arg6=<optimized out>, arg5=<optimized
o
ut>, arg4=<optimized out>, arg3=<optimized out>, arg2=<optimized out>,
arg1=<opt
imized out>) at
/home/dave/gnu/gcc/gcc/gcc/testsuite/gcc.dg/guality/pr36728-2.c:
16
16        asm (NOP : "=m" (y), "=m" (b) : "m" (y));
$1 = <optimized out>
$2 = 1
<optimized out> != 1
FAIL: gcc.dg/guality/pr36728-2.c   -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects  -DPREVENT_OPTIMIZATION line 16 arg1 == 1