1 2005-11-28 Jakub Jelinek <jakub@redhat.com>
3 * config/rs6000/rs6000.c (rs6000_return_addr): If COUNT == 0,
4 read word RETURN_ADDRESS_OFFSET bytes above arg_pointer_rtx
5 instead of doing an extran indirection from frame_pointer_rtx.
7 * gcc.dg/20051128-1.c: New test.
9 --- gcc/config/rs6000/rs6000.c.jj 2005-11-26 14:38:01.000000000 +0100
10 +++ gcc/config/rs6000/rs6000.c 2005-11-28 20:32:18.000000000 +0100
11 @@ -20970,18 +20970,22 @@ rs6000_return_addr (int count, rtx frame
13 || ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_DARWIN) && flag_pic))
16 cfun->machine->ra_needs_full_frame = 1;
23 - plus_constant (Pmode,
25 - (gen_rtx_MEM (Pmode,
26 - memory_address (Pmode, frame))),
27 - RETURN_ADDRESS_OFFSET)));
30 + gcc_assert (frame == frame_pointer_rtx);
31 + x = arg_pointer_rtx;
35 + x = memory_address (Pmode, frame);
36 + x = copy_to_reg (gen_rtx_MEM (Pmode, x));
39 + x = plus_constant (Pmode, x, RETURN_ADDRESS_OFFSET);
40 + return gen_rtx_MEM (Pmode, memory_address (Pmode, x));
43 cfun->machine->ra_need_lr = 1;
44 --- gcc/testsuite/gcc.dg/20051128-1.c.jj 2005-10-10 11:21:41.096999000 +0200
45 +++ gcc/testsuite/gcc.dg/20051128-1.c 2005-11-28 12:30:57.000000000 +0100
48 +/* { dg-options "-O2 -fpic" } */
50 +extern void exit (int);
51 +extern void abort (void);
63 +__attribute__((noinline))
64 +foo (struct A *a, void *x)
66 + __builtin_memset (a, 0, sizeof (a));
72 +__attribute__((noinline))
77 + __builtin_unwind_init ();
78 + foo (&a, __builtin_return_address (0));