On Thu, Jun 14, 2001 at 11:41:17AM -0700, H . J . Lu wrote:
> 1. Is the usage of current_frame_info.args_size right?
Yes.
> 2. What should be in the place of [(const_int 4)]?
Some unspec_volatile.
> 3. Does it need other patterns for similar situations?
Yes, O64.
> 4. Is my patch ok?
No.
This one should be ok.
r~
Index: mips.md
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/mips/mips.md,v
retrieving revision 1.94
diff -c -p -d -r1.94 mips.md
*** mips.md 2001/05/20 00:35:24 1.94
--- mips.md 2001/06/14 18:50:32
***************
*** 30,42 ****
;; Number USE
;; 0 movsi_ul
;; 1 movsi_us, get_fnaddr
- ;; 2 loadgp
;; 3 eh_set_return
;; 20 builtin_setjmp_setup
;;
;; UNSPEC_VOLATILE values
;; 0 blockage
;; 3 builtin_longjmp
;; 10 consttable_qi
;; 11 consttable_hi
;; 12 consttable_si
--- 30,43 ----
;; Number USE
;; 0 movsi_ul
;; 1 movsi_us, get_fnaddr
;; 3 eh_set_return
;; 20 builtin_setjmp_setup
;;
;; UNSPEC_VOLATILE values
;; 0 blockage
+ ;; 2 loadgp
;; 3 builtin_longjmp
+ ;; 4 exception_receiver
;; 10 consttable_qi
;; 11 consttable_hi
;; 12 consttable_si
*************** ld\\t%2,%1-%S1(%2)\;daddu\\t%2,%2,$31\;j
*** 9571,9576 ****
--- 9572,9598 ----
operands[0]);
DONE;
}")
+
+ (define_insn "exception_receiver"
+ [(unspec_volatile [(const_int 0)] 4)]
+ "TARGET_ABICALLS && (mips_abi == ABI_32 || mips_abi == ABI_O64)"
+ "*
+ {
+ rtx loc;
+
+ operands[0] = gen_rtx_REG (Pmode, PIC_FUNCTION_ADDR_REGNUM);
+
+ if (frame_pointer_needed)
+ loc = hard_frame_pointer_rtx;
+ else
+ loc = stack_pointer_rtx;
+ loc = plus_constant (loc, current_frame_info.args_size);
+ operands[1] = gen_rtx_MEM (Pmode, loc);
+
+ return mips_move_1word (operands, insn, 0);
+ }"
+ [(set_attr "type" "load")
+ (set_attr "length" "8")])
;;
;; ....................
