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re PR target/16494 ([3.3.2/3.4/3.5] Pessimization with FP conditional branches)

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PR target/16494
	* config/sparc/sparc.c (output_cbranch): Properly guard
	the code handling far branches with TARGET_V9.
	* config/sparc/sparc.md (length attribute): Document the
	side-effect of having a length greater or equal to 3.

From-SVN: r84618
This commit is contained in:
Eric Botcazou 2004-07-13 14:08:56 +02:00 committed by Eric Botcazou
parent aeb29bae3d
commit 883d9e0c3f
3 changed files with 15 additions and 4 deletions

8
gcc/ChangeLog

@ -1,3 +1,11 @@
2004-07-13 Eric Botcazou <ebotcazou@libertysurf.fr>
PR target/16494
* config/sparc/sparc.c (output_cbranch): Properly guard
the code handling far branches with TARGET_V9.
* config/sparc/sparc.md (length attribute): Document the
side-effect of having a length greater or equal to 3.
2004-07-13 Eric Botcazou <ebotcazou@libertysurf.fr>
Lloyd Parkes <lloyd@must-have-coffee.gen.nz>

9
gcc/config/sparc/sparc.c

@ -6131,7 +6131,7 @@ output_cbranch (rtx op, rtx dest, int label, int reversed, int annul,
nop
ba .LC29 */
far = get_attr_length (insn) >= 3;
far = TARGET_V9 && (get_attr_length (insn) >= 3);
if (reversed ^ far)
{
/* Reversal of FP compares takes care -- an ordered compare
@ -6261,9 +6261,7 @@ output_cbranch (rtx op, rtx dest, int label, int reversed, int annul,
spaces -= 2;
}
if (! TARGET_V9)
labelno = "";
else
if (TARGET_V9)
{
rtx note;
int v8 = 0;
@ -6313,6 +6311,9 @@ output_cbranch (rtx op, rtx dest, int label, int reversed, int annul,
spaces -= 3;
}
}
else
labelno = "";
if (spaces > 0)
*p++ = '\t';
else

2
gcc/config/sparc/sparc.md

@ -128,6 +128,8 @@
(symbol_ref "flag_delayed_branch != 0"))
;; Length (in # of insns).
;; Beware that setting a length greater or equal to 3 for conditional branches
;; has a side-effect (see output_cbranch and output_v9branch).
(define_attr "length" ""
(cond [(eq_attr "type" "uncond_branch,call")
(if_then_else (eq_attr "empty_delay_slot" "true")