[PATCH] fix -mnop-mcount generate 5byte nop in 32bit.

[박한범]

"-mnop-mcount" needs to make 5byte size "nop" instruction.
however recently gcc make only 4byte "nop" in 32bit.
I have test in gcc 5.4, 7.2.


=======================================================
bug result
=======================================================
080485c5 <main>:
 80485c5:       0f 1f 04 00             nopl   (%eax,%eax,1)
 80485c9:       8d 4c 24 04             lea    0x4(%esp),%ecx
 80485cd:       83 e4 f0                and    $0xfffffff0,%esp

=======================================================
fixed result
=======================================================
08048598 <main>:
 8048598:       0f 1f 44 00 01          nopl   0x1(%eax,%eax,1)
 804859d:       8d 4c 24 04             lea    0x4(%esp),%ecx
 80485a1:       83 e4 f0                and    $0xfffffff0,%esp


is it OK?


=======================================================
Index : gcc/config/i386/i386.c
=======================================================
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index c6ca071..e574de3 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -40474,7 +40474,7 @@ static void
 x86_print_call_or_nop (FILE *file, const char *target)
 {
   if (flag_nop_mcount)
-    fprintf (file, "1:\tnopl 0x00(%%eax,%%eax,1)\n"); /* 5 byte nop.  */
+    fprintf (file, "1:\tnopl 0x01(%%eax,%%eax,1)\n"); /* 5 byte nop.  */
   else
     fprintf (file, "1:\tcall\t%s\n", target);
 }