OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

lower-subreg.c (shift_cost): Use set_src_cost, avoiding the SET. 

gcc/
	* lower-subreg.c (shift_cost): Use set_src_cost, avoiding the SET.
	(compute_costs): Likewise for the zero extension.  Use set_rtx_cost
	to compute the cost of moves.  Set the mode of the target register.

From-SVN: r187212
This commit is contained in:
Richard Sandiford 2012-05-06 18:55:20 +00:00 committed by Richard Sandiford
parent 4fe977f2d6
commit 69523a7c89
2 changed files with 12 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2012-05-06 Richard Sandiford <rdsandiford@googlemail.com>
* lower-subreg.c (shift_cost): Use set_src_cost, avoiding the SET.
(compute_costs): Likewise for the zero extension. Use set_rtx_cost
to compute the cost of moves. Set the mode of the target register.
2012-05-05 Richard Sandiford <rdsandiford@googlemail.com>
* rtl.h (plus_constant, plus_constant_mode): Merge into a single

15
gcc/lower-subreg.c
View File

@ -135,13 +135,11 @@ static int
shift_cost (bool speed_p, struct cost_rtxes *rtxes, enum rtx_code code,
enum machine_mode mode, int op1)
{
PUT_MODE (rtxes->target, mode);
PUT_CODE (rtxes->shift, code);
PUT_MODE (rtxes->shift, mode);
PUT_MODE (rtxes->source, mode);
XEXP (rtxes->shift, 1) = GEN_INT (op1);
SET_SRC (rtxes->set) = rtxes->shift;
return insn_rtx_cost (rtxes->set, speed_p);
return set_src_cost (rtxes->shift, speed_p);
}
/* For each X in the range [0, BITS_PER_WORD), set SPLITTING[X]
@ -189,11 +187,12 @@ compute_costs (bool speed_p, struct cost_rtxes *rtxes)
unsigned int i;
int word_move_zero_cost, word_move_cost;
PUT_MODE (rtxes->target, word_mode);
SET_SRC (rtxes->set) = CONST0_RTX (word_mode);
word_move_zero_cost = insn_rtx_cost (rtxes->set, speed_p);
word_move_zero_cost = set_rtx_cost (rtxes->set, speed_p);
SET_SRC (rtxes->set) = rtxes->source;
word_move_cost = insn_rtx_cost (rtxes->set, speed_p);
word_move_cost = set_rtx_cost (rtxes->set, speed_p);
if (LOG_COSTS)
fprintf (stderr, "%s move: from zero cost %d, from reg cost %d\n",
@ -209,7 +208,7 @@ compute_costs (bool speed_p, struct cost_rtxes *rtxes)
PUT_MODE (rtxes->target, mode);
PUT_MODE (rtxes->source, mode);
mode_move_cost = insn_rtx_cost (rtxes->set, speed_p);
mode_move_cost = set_rtx_cost (rtxes->set, speed_p);
if (LOG_COSTS)
fprintf (stderr, "%s move: original cost %d, split cost %d * %d\n",
@ -236,10 +235,8 @@ compute_costs (bool speed_p, struct cost_rtxes *rtxes)
/* The only case here to check to see if moving the upper part with a
zero is cheaper than doing the zext itself. */
PUT_MODE (rtxes->target, twice_word_mode);
PUT_MODE (rtxes->source, word_mode);
SET_SRC (rtxes->set) = rtxes->zext;
zext_cost = insn_rtx_cost (rtxes->set, speed_p);
zext_cost = set_src_cost (rtxes->zext, speed_p);
if (LOG_COSTS)
fprintf (stderr, "%s %s: original cost %d, split cost %d + %d\n",