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rtl.def (ATTR_FLAG): Remove probability indicating flags. 

* rtl.def (ATTR_FLAG): Remove probability indicating flags.
	* genattr.c (main): Remove ATTR_FLAG_likely, ATTR_FLAG_unlikely,
	ATTR_FLAG_very_likely, and ATTR_FLAG_very_unlikely.
	* reorg.c (get_jump_flags): Do not set the removed flags.

From-SVN: r187178
This commit is contained in:
Steven Bosscher 2012-05-04 19:37:59 +00:00
parent 780140d3af
commit 593dbe1191
4 changed files with 9 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-05-04 Steven Bosscher <steven@gcc.gnu.org>
* rtl.def (ATTR_FLAG): Remove probability indicating flags.
* genattr.c (main): Remove ATTR_FLAG_likely, ATTR_FLAG_unlikely,
ATTR_FLAG_very_likely, and ATTR_FLAG_very_unlikely.
* reorg.c (get_jump_flags): Do not set the removed flags.
2012-05-04 Uros Bizjak <ubizjak@gmail.com> 2012-05-04 Uros Bizjak <ubizjak@gmail.com>
PR target/53228 PR target/53228

7
gcc/genattr.c
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@ -344,14 +344,9 @@ main (int argc, char **argv)
/* Output flag masks for use by reorg. /* Output flag masks for use by reorg.
Flags are used to hold branch direction and prediction information Flags are used to hold branch direction for use by eligible_for_... */
for use by eligible_for_... */
printf("\n#define ATTR_FLAG_forward\t0x1\n"); printf("\n#define ATTR_FLAG_forward\t0x1\n");
printf("#define ATTR_FLAG_backward\t0x2\n"); printf("#define ATTR_FLAG_backward\t0x2\n");
printf("#define ATTR_FLAG_likely\t0x4\n");
printf("#define ATTR_FLAG_very_likely\t0x8\n");
printf("#define ATTR_FLAG_unlikely\t0x10\n");
printf("#define ATTR_FLAG_very_unlikely\t0x20\n");
puts("\n#endif /* GCC_INSN_ATTR_H */"); puts("\n#endif /* GCC_INSN_ATTR_H */");

32
gcc/reorg.c
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@ -903,38 +903,6 @@ get_jump_flags (rtx insn, rtx label)
else else
flags = 0; flags = 0;
/* If insn is a conditional branch call mostly_true_jump to get
determine the branch prediction.
Non conditional branches are predicted as very likely taken. */
if (JUMP_P (insn)
&& (condjump_p (insn) || condjump_in_parallel_p (insn)))
{
int prediction;
prediction = mostly_true_jump (insn, get_branch_condition (insn, label));
switch (prediction)
{
case 2:
flags |= (ATTR_FLAG_very_likely | ATTR_FLAG_likely);
break;
case 1:
flags |= ATTR_FLAG_likely;
break;
case 0:
flags |= ATTR_FLAG_unlikely;
break;
case -1:
flags |= (ATTR_FLAG_very_unlikely | ATTR_FLAG_unlikely);
break;
default:
gcc_unreachable ();
}
}
else
flags |= (ATTR_FLAG_very_likely | ATTR_FLAG_likely);
return flags; return flags;
} }

4
gcc/rtl.def
View File

@ -1268,9 +1268,7 @@ DEF_RTL_EXPR(EQ_ATTR_ALT, "eq_attr_alt", "ii", RTX_EXTRA)
true for the insn being scheduled in reorg. true for the insn being scheduled in reorg.
genattr.c defines the following flags which can be tested by genattr.c defines the following flags which can be tested by
(attr_flag "foo") expressions in eligible_for_delay. (attr_flag "foo") expressions in eligible_for_delay: forward, backward. */
forward, backward, very_likely, likely, very_unlikely, and unlikely. */
DEF_RTL_EXPR (ATTR_FLAG, "attr_flag", "s", RTX_EXTRA) DEF_RTL_EXPR (ATTR_FLAG, "attr_flag", "s", RTX_EXTRA)