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(return_address_pointer_rtx): New global variable. 

(gen_rtx, init_emit_once): Add support for it.

From-SVN: r10817
This commit is contained in:
Jim Wilson 1995-12-19 15:25:43 -08:00
parent 8e05e5dde2
commit a4417a8631
1 changed files with 14 additions and 0 deletions
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14
gcc/emit-rtl.c
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@ -159,6 +159,10 @@ rtx static_chain_rtx; /* (REG:Pmode STATIC_CHAIN_REGNUM) */
rtx static_chain_incoming_rtx; /* (REG:Pmode STATIC_CHAIN_INCOMING_REGNUM) */
rtx pic_offset_table_rtx; /* (REG:Pmode PIC_OFFSET_TABLE_REGNUM) */
/* This is used to implement __builtin_return_address for some machines.
See for instance the MIPS port. */
rtx return_address_pointer_rtx; /* (REG:Pmode RETURN_ADDRESS_POINTER_REGNUM) */
rtx virtual_incoming_args_rtx; /* (REG:Pmode VIRTUAL_INCOMING_ARGS_REGNUM) */
rtx virtual_stack_vars_rtx; /* (REG:Pmode VIRTUAL_STACK_VARS_REGNUM) */
rtx virtual_stack_dynamic_rtx; /* (REG:Pmode VIRTUAL_STACK_DYNAMIC_REGNUM) */
@ -344,6 +348,11 @@ gen_rtx VPROTO((enum rtx_code code, enum machine_mode mode, ...))
if (arg_pointer_rtx && regno == ARG_POINTER_REGNUM && mode == Pmode
&& ! reload_in_progress)
return arg_pointer_rtx;
#endif
#ifdef RETURN_ADDRESS_POINTER_REGNUM
if (return_address_pointer_rtx && regno == RETURN_ADDRESS_POINTER_REGNUM
&& mode == Pmode && ! reload_in_progress)
return return_address_pointer_rtx;
#endif
if (stack_pointer_rtx && regno == STACK_POINTER_REGNUM && mode == Pmode
&& ! reload_in_progress)
@ -3392,6 +3401,11 @@ init_emit_once (line_numbers)
else
arg_pointer_rtx = gen_rtx (REG, Pmode, ARG_POINTER_REGNUM);
#ifdef RETURN_ADDRESS_POINTER_REGNUM
return_address_pointer_rtx = gen_rtx (REG, Pmode,
RETURN_ADDRESS_POINTER_REGNUM);
#endif
/* Create the virtual registers. Do so here since the following objects
might reference them. */