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ia64.md: Define new attribute "empty". 

* config/ia64/ia64.md: Define new attribute "empty".
	(prologue_use, nop_x, insn_group_barrier): Set it.

	* config/ia64/ia64.c (ia64_reorg): When looking for trailing call
	skip over "empty" insns.

From-SVN: r84059
This commit is contained in:
Andreas Schwab 2004-07-03 16:59:38 +00:00 committed by Andreas Schwab
parent 83e113ae50
commit fa9784263f
3 changed files with 24 additions and 8 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2004-07-03 Andreas Schwab <schwab@suse.de>
* config/ia64/ia64.md: Define new attribute "empty".
(prologue_use, nop_x, insn_group_barrier): Set it.
* config/ia64/ia64.c (ia64_reorg): When looking for trailing call
skip over "empty" insns.
2004-07-03 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* tree-inline.c (initialize_inlined_parameters): Pass proper function

11
gcc/config/ia64/ia64.c
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@ -7666,11 +7666,12 @@ ia64_reorg (void)
insn = get_last_insn ();
if (! INSN_P (insn))
insn = prev_active_insn (insn);
if (GET_CODE (insn) == INSN
&& GET_CODE (PATTERN (insn)) == UNSPEC_VOLATILE
&& XINT (PATTERN (insn), 1) == UNSPECV_INSN_GROUP_BARRIER)
{
saw_stop = 1;
/* Skip over insns that expand to nothing. */
while (GET_CODE (insn) == INSN && get_attr_empty (insn) == EMPTY_YES)
{
if (GET_CODE (PATTERN (insn)) == UNSPEC_VOLATILE
&& XINT (PATTERN (insn), 1) == UNSPECV_INSN_GROUP_BARRIER)
saw_stop = 1;
insn = prev_active_insn (insn);
}
if (GET_CODE (insn) == CALL_INSN)

13
gcc/config/ia64/ia64.md
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@ -154,6 +154,10 @@
(define_attr "predicable" "no,yes" (const_string "yes"))
;; Empty. True iff this insn does not generate any code.
(define_attr "empty" "no,yes" (const_string "no"))
;; DFA descriptions of ia64 processors used for insn scheduling and
@ -5425,7 +5429,8 @@
""
""
[(set_attr "itanium_class" "ignore")
(set_attr "predicable" "no")])
(set_attr "predicable" "no")
(set_attr "empty" "yes")])
;; Allocate a new register frame.
@ -5592,7 +5597,8 @@
[(const_int 5)]
""
""
[(set_attr "itanium_class" "nop_x")])
[(set_attr "itanium_class" "nop_x")
(set_attr "empty" "yes")])
;; The following insn will be never generated. It is used only by
;; insn scheduler to change state before advancing cycle.
@ -5624,7 +5630,8 @@
""
";;"
[(set_attr "itanium_class" "stop_bit")
(set_attr "predicable" "no")])
(set_attr "predicable" "no")
(set_attr "empty" "yes")])
(define_expand "trap"
[(trap_if (const_int 1) (const_int 0))]