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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
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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>
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.
Flags are used to hold branch direction and prediction information
for use by eligible_for_... */
Flags are used to hold branch direction for use by eligible_for_... */
printf("\n#define ATTR_FLAG_forward\t0x1\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 */");

32
gcc/reorg.c
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@ -903,38 +903,6 @@ get_jump_flags (rtx insn, rtx label)
else
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;
}

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.
genattr.c defines the following flags which can be tested by
(attr_flag "foo") expressions in eligible_for_delay.
forward, backward, very_likely, likely, very_unlikely, and unlikely. */
(attr_flag "foo") expressions in eligible_for_delay: forward, backward. */
DEF_RTL_EXPR (ATTR_FLAG, "attr_flag", "s", RTX_EXTRA)