[Bug tree-optimization/118409] [15 regression] gas miscompiled by ifcombine ("Unsupported broadcast" assemble failure)

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118409

--- Comment #9 from Sam James <sjames at gcc dot gnu.org> ---
Bad:
```
Breakpoint 2, i386_assemble (line=0x555555752532 "vpsubd
-168(%ebp){1to4},%xmm0,%xmm0") at
/home/sam/git/binutils-gdb/gas/config/tc-i386.c:6927
[...]

(gdb) n
6946      end = parse_insn (line, mnemonic, parse_all);
(gdb) p mnemonic
$11 = "\230\vsUUU\000\000%{VUUU\000\000\002\000\000"
(gdb)
```

Good:
```
Breakpoint 5, i386_assemble (line=0x555555752532 "vpsubd
-168(%ebp){1to4},%xmm0,%xmm0") at
/home/sam/git/binutils-gdb/gas/config/tc-i386.c:6927
6927      struct pseudo_prefixes orig_pp = pp;
[...]
(gdb) p mnemonic
$4 = "\230\vsUUU\000\000\305{VUUU\000\000\002\000\000"
(gdb)
```