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alpha.h (PRINT_OPERAND_PUNCT_VALID_P): Add '+'.

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* config/alpha/alpha.h (PRINT_OPERAND_PUNCT_VALID_P): Add '+'.
	* config/alpha/alpha.c (print_operand, case '+'): New.
	* config/alpha/alpha.md (call_osf_1_noreturn): Document and use.
	(call_value_osf_1_noreturn): Likewise.

From-SVN: r63882
This commit is contained in:
Olivier Hainque 2003-03-06 01:32:29 +01:00 committed by Richard Kenner
parent 99a86ee1e2
commit 39ee7fa955
4 changed files with 34 additions and 7 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
Wed Mar 5 19:34:18 2003 Olivier Hainque <hainque@act-europe.fr>
* config/alpha/alpha.h (PRINT_OPERAND_PUNCT_VALID_P): Add '+'.
* config/alpha/alpha.c (print_operand, case '+'): New.
* config/alpha/alpha.md (call_osf_1_noreturn): Document and use.
(call_value_osf_1_noreturn): Likewise.
Wed Mar 5 18:55:02 2003 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* stmt.c (fixup_gotos): Change meaning of DONT_JUMP_IN.

7
gcc/config/alpha/alpha.c
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@ -5916,6 +5916,13 @@ print_operand (file, x, code)
fputc ((TARGET_FLOAT_VAX ? 'g' : 't'), file);
break;
case '+':
/* Generates a nop after a noreturn call at the very end of the
function. */
if (next_real_insn (current_output_insn) == 0)
fprintf (file, "\n\tnop");
break;
case '#':
if (alpha_this_literal_sequence_number == 0)
alpha_this_literal_sequence_number = alpha_next_sequence_number++;

5
gcc/config/alpha/alpha.h
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@ -1720,11 +1720,14 @@ do { \
- Generates double precision suffix for floating point
instructions (t for IEEE, g for VAX)
+ Generates a nop instruction after a noreturn call at the very end
of the function
*/
#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
((CODE) == '/' || (CODE) == ',' || (CODE) == '-' || (CODE) == '~' \
|| (CODE) == '#' || (CODE) == '*' || (CODE) == '&')
|| (CODE) == '#' || (CODE) == '*' || (CODE) == '&' || (CODE) == '+')
/* Print a memory address as an operand to reference that memory location. */

22
gcc/config/alpha/alpha.md
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@ -4687,6 +4687,16 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
"jsr $26,(%0),%2%J3"
[(set_attr "type" "jsr")])
;; We output a nop after noreturn calls at the very end of the function to
;; ensure that the return address always remains in the caller's code range,
;; as not doing so might confuse unwinding engines.
;;
;; The potential change in insn length is not reflected in the length
;; attributes at this stage. Since the extra space is only actually added at
;; the very end of the compilation process (via final/print_operand), it
;; really seems harmless and not worth the trouble of some extra computation
;; cost and complexity.
(define_insn "*call_osf_1_noreturn"
[(call (mem:DI (match_operand:DI 0 "call_operand" "c,R,s"))
(match_operand 1 "" ""))
@ -4695,9 +4705,9 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
"! TARGET_EXPLICIT_RELOCS && TARGET_ABI_OSF
&& find_reg_note (insn, REG_NORETURN, NULL_RTX)"
"@
jsr $26,($27),0
bsr $26,$%0..ng
jsr $26,%0"
jsr $26,($27),0%+
bsr $26,$%0..ng%+
jsr $26,%0%+"
[(set_attr "type" "jsr")
(set_attr "length" "*,*,8")])
@ -7920,9 +7930,9 @@ fadd,fmul,fcpys,fdiv,fsqrt,misc,mvi,ftoi,itof,multi,none"
"! TARGET_EXPLICIT_RELOCS && TARGET_ABI_OSF
&& find_reg_note (insn, REG_NORETURN, NULL_RTX)"
"@
jsr $26,($27),0
bsr $26,$%1..ng
jsr $26,%1"
jsr $26,($27),0%+
bsr $26,$%1..ng%+
jsr $26,%1%+"
[(set_attr "type" "jsr")
(set_attr "length" "*,*,8")])