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| author | Jim Wilson <wilson@gcc.gnu.org> | 1995-12-19 15:25:43 -0800 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1995-12-19 15:25:43 -0800 |
| commit | a4417a863114d5c9c31c86ed71cc4294d650733c (patch) | |
| tree | c340d9870bf8d750e5c135911e17f13af5b447ca /gcc/emit-rtl.c | |
| parent | 8e05e5dde2668819a939cae3f9d702f206deb674 (diff) | |
| download | gcc-a4417a863114d5c9c31c86ed71cc4294d650733c.zip gcc-a4417a863114d5c9c31c86ed71cc4294d650733c.tar.gz gcc-a4417a863114d5c9c31c86ed71cc4294d650733c.tar.bz2 | |
(return_address_pointer_rtx): New global variable.
(gen_rtx, init_emit_once): Add support for it.
From-SVN: r10817
Diffstat (limited to 'gcc/emit-rtl.c')
| -rw-r--r-- | gcc/emit-rtl.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 9600f2f..3f4958d7 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -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) */ @@ -345,6 +349,11 @@ gen_rtx VPROTO((enum rtx_code code, enum machine_mode mode, ...)) && ! 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) return stack_pointer_rtx; @@ -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. */ |