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ifcvt.c (noce_try_store_flag_mask): Check rtx cost. 

ChangeLog:
2014-11-03  Zhenqiang Chen  <zhenqiang.chen@arm.com>

	* ifcvt.c (noce_try_store_flag_mask): Check rtx cost.

testsuite/ChangeLog:
2014-11-03  Zhenqiang Chen  <zhenqiang.chen@arm.com>

	* gcc.target/arm/ifcvt-size-check.c: New test.

From-SVN: r217029
This commit is contained in:
Zhenqiang Chen 2014-11-03 06:36:11 +00:00 committed by Zhenqiang Chen
parent ed60a04bbb
commit b5a4533b36
4 changed files with 32 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2014-11-03 Zhenqiang Chen <zhenqiang.chen@arm.com>
* ifcvt.c (noce_try_store_flag_mask): Check rtx cost.
2014-11-03 Andrew Pinski <apinski@cavium.com>
* config/mips/mips-cpus.def (octeon3): New cpu.

11
gcc/ifcvt.c
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@ -1394,6 +1394,9 @@ noce_try_store_flag_mask (struct noce_if_info *if_info)
if (target)
{
int old_cost, new_cost, insn_cost;
int speed_p;
if (target != if_info->x)
noce_emit_move_insn (if_info->x, target);
@ -1401,6 +1404,14 @@ noce_try_store_flag_mask (struct noce_if_info *if_info)
if (!seq)
return FALSE;
speed_p = optimize_bb_for_speed_p (BLOCK_FOR_INSN (if_info->insn_a));
insn_cost = insn_rtx_cost (PATTERN (if_info->insn_a), speed_p);
old_cost = COSTS_N_INSNS (if_info->branch_cost) + insn_cost;
new_cost = seq_cost (seq, speed_p);
if (new_cost > old_cost)
return FALSE;
emit_insn_before_setloc (seq, if_info->jump,
INSN_LOCATION (if_info->insn_a));
return TRUE;

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2014-11-03 Zhenqiang Chen <zhenqiang.chen@arm.com>
* gcc.target/arm/ifcvt-size-check.c: New test.
2014-11-03 Naveen H.S <Naveen.Hurugalawadi@caviumnetworks.com>
* gcc.target/mips/octeon3-pipe-1.c: New test.

13
gcc/testsuite/gcc.target/arm/ifcvt-size-check.c Normal file
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@ -0,0 +1,13 @@
/* { dg-do assemble } */
/* { dg-options "-mthumb -Os " } */
/* { dg-require-effective-target arm_thumb1_ok } */
int
test (unsigned char iov_len, int count, int i)
{
unsigned char bytes = 0;
if ((unsigned char) ((char) 127 - bytes) < iov_len)
return 22;
return 0;
}
/* { dg-final { object-size text <= 12 } } */