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Use FOR_EACH_IMM_USE_FAST in gimple-ssa-backprop.c

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As pointed out by Richard in PR63155.  It speeds up the testcase a few %.

2018-10-08  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	PR middle-end/63155
	* gimple-ssa-backprop.c (backprop::intersect_uses): Use
	FOR_EACH_IMM_USE_FAST instead of FOR_EACH_IMM_USE_STMT.

From-SVN: r264941
This commit is contained in:
Richard Sandiford 2018-10-08 18:58:59 +00:00 committed by Richard Sandiford
parent be86efa7cc
commit 91a3cbb4d2
2 changed files with 10 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-10-08 Richard Sandiford <richard.sandiford@arm.com>
PR middle-end/63155
* gimple-ssa-backprop.c (backprop::intersect_uses): Use
FOR_EACH_IMM_USE_FAST instead of FOR_EACH_IMM_USE_STMT.
2018-10-08 H.J. Lu <hongjiu.lu@intel.com>
PR target/87517

10
gcc/gimple-ssa-backprop.c
View File

@ -496,10 +496,11 @@ bool
backprop::intersect_uses (tree var, usage_info *info)
{
imm_use_iterator iter;
gimple *stmt;
use_operand_p use_p;
*info = usage_info::intersection_identity ();
FOR_EACH_IMM_USE_STMT (stmt, iter, var)
FOR_EACH_IMM_USE_FAST (use_p, iter, var)
{
gimple *stmt = USE_STMT (use_p);
if (is_gimple_debug (stmt))
continue;
gphi *phi = dyn_cast <gphi *> (stmt);
@ -523,10 +524,7 @@ backprop::intersect_uses (tree var, usage_info *info)
process_use (stmt, var, &subinfo);
*info &= subinfo;
if (!info->is_useful ())
{
BREAK_FROM_IMM_USE_STMT (iter);
return false;
}
return false;
}
}
return true;