[Bug target/30936] const attribute in nanf prototype causes gcc not producing correct code.

["filippo dot arcidiacono at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #5 from filippo dot arcidiacono at gmail dot com  2007-02-26 09:29 -------
Created an attachment (id=13112)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13112&action=view)
assembler code of nanf-test.c

Following a piece of the objdump of the nanf-test:
:
:
int
main (void)
{
   0:   e6 2f           mov.l   r14,@-r15
   2:   22 4f           sts.l   pr,@-r15
   4:   f8 7f           add     #-8,r15
   6:   f3 6e           mov     r15,r14
  int op;

  op = (nanf ("") != nanf ("") );
   8:   e3 62           mov     r14,r2
   a:   c8 72           add     #-56,r2
   c:   00 e1           mov     #0,r1
   e:   1f 12           mov.l   r1,@(60,r2)
  if (!op) {
  10:   e3 61           mov     r14,r1
  12:   c8 71           add     #-56,r1
  14:   1f 51           mov.l   @(60,r1),r1
  16:   18 21           tst     r1,r1
  18:   08 8b           bf      2c <main+0x2c>
    printf ("Test NAN Failed!\n");
  1a:   09 d1           mov.l   40 <main+0x40>,r1       ! 0x0 <main>
  1c:   13 64           mov     r1,r4
  1e:   09 d1           mov.l   44 <main+0x44>,r1       ! 0x0 <main>
  20:   0b 41           jsr     @r1
  22:   09 00           nop     
    return (1);
  24:   01 e1           mov     #1,r1
  26:   12 2e           mov.l   r1,@r14
  28:   02 a0           bra     30 <main+0x30>
  2a:   09 00           nop     
  }
:
:
Note that I using sh4 architecture.
In attach you can find the nanf-test.s that doesn't contains any reference 
to nanf symbol.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30936