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openSUSE:Leap:15.2
gcc9
gcc41-ppc32-retaddr.patch
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File gcc41-ppc32-retaddr.patch of Package gcc9
2005-11-28 Jakub Jelinek <jakub@redhat.com> * config/rs6000/rs6000.c (rs6000_return_addr): If COUNT == 0, read word RETURN_ADDRESS_OFFSET bytes above arg_pointer_rtx instead of doing an extran indirection from frame_pointer_rtx. * gcc.dg/20051128-1.c: New test. #Index: gcc/config/rs6000/rs6000.c #=================================================================== #--- gcc/config/rs6000/rs6000.c.orig 2013-11-26 15:42:33.000000000 +0100 #+++ gcc/config/rs6000/rs6000.c 2013-11-26 16:44:14.566089231 +0100 #@@ -20878,18 +20878,22 @@ rs6000_return_addr (int count, rtx frame if (count != 0 || ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_DARWIN) && flag_pic)) { + rtx x; cfun->machine->ra_needs_full_frame = 1; - return - gen_rtx_MEM - (Pmode, - memory_address - (Pmode, - plus_constant (Pmode, - copy_to_reg - (gen_rtx_MEM (Pmode, - memory_address (Pmode, frame))), - RETURN_ADDRESS_OFFSET))); + if (count == 0) + { + gcc_assert (frame == frame_pointer_rtx); + x = arg_pointer_rtx; + } + else + { + x = memory_address (Pmode, frame); + x = copy_to_reg (gen_rtx_MEM (Pmode, x)); + } + + x = plus_constant (Pmode, x, RETURN_ADDRESS_OFFSET); + return gen_rtx_MEM (Pmode, memory_address (Pmode, x)); } cfun->machine->ra_need_lr = 1; Index: gcc/testsuite/gcc.dg/20051128-1.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/20051128-1.c 2013-11-26 16:44:14.566089231 +0100 @@ -0,0 +1,41 @@ +/* { dg-do run } */ +/* { dg-options "-O2 -fpic" } */ + +extern void exit (int); +extern void abort (void); + +int b; + +struct A +{ + void *pad[147]; + void *ra, *h; + long o; +}; + +void +__attribute__((noinline)) +foo (struct A *a, void *x) +{ + __builtin_memset (a, 0, sizeof (a)); + if (!b) + exit (0); +} + +void +__attribute__((noinline)) +bar (void) +{ + struct A a; + + __builtin_unwind_init (); + foo (&a, __builtin_return_address (0)); +} + +int +main (void) +{ + bar (); + abort (); + return 0; +}
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