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x86: Remove "%!" before ret

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Before MPX was removed, "%!" was mapped to

        case '!':
          if (ix86_bnd_prefixed_insn_p (current_output_insn))
            fputs ("bnd ", file);
          return;

After CET was added and MPX was removed, "%!" was mapped to

       case '!':
          if (ix86_notrack_prefixed_insn_p (current_output_insn))
            fputs ("notrack ", file);
          return;

ix86_notrack_prefixed_insn_p always returns false on ret since the
notrack prefix is only for indirect branches.  Remove the unused "%!"
before ret.

	PR target/103307
	* config/i386/i386.c (ix86_code_end): Remove "%!" before ret.
	(ix86_output_function_return): Likewise.
	* config/i386/i386.md (simple_return_pop_internal): Likewise.
This commit is contained in:
H.J. Lu 2021-11-17 11:41:12 -08:00
parent 425369bf30
commit 8e410de43c
2 changed files with 3 additions and 3 deletions
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4
gcc/config/i386/i386.c
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@ -6115,7 +6115,7 @@ ix86_code_end (void)
xops[0] = gen_rtx_REG (Pmode, regno);
xops[1] = gen_rtx_MEM (Pmode, stack_pointer_rtx);
output_asm_insn ("mov%z0\t{%1, %0|%0, %1}", xops);
output_asm_insn ("%!ret", NULL);
fputs ("\tret\n", asm_out_file);
final_end_function ();
init_insn_lengths ();
free_after_compilation (cfun);
@ -16273,7 +16273,7 @@ ix86_output_function_return (bool long_p)
}
if (!long_p)
return "%!ret";
return "ret";
return "rep%; ret";
}

2
gcc/config/i386/i386.md
View File

@ -14705,7 +14705,7 @@
[(simple_return)
(use (match_operand:SI 0 "const_int_operand"))]
"reload_completed"
"%!ret\t%0"
"ret\t%0"
"&& cfun->machine->function_return_type != indirect_branch_keep"
[(const_int 0)]
"ix86_split_simple_return_pop_internal (operands[0]); DONE;"