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Do not check the if-convertibility of statements that are not predicated.

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2010-05-26  Sebastian Pop  <sebastian.pop@amd.com>

	* tree-if-conv.c (if_convertible_gimple_assign_stmt_p): Do not
	special case loop->header.
	(is_predicated): New.
	(if_convertible_loop_p): Call it.

From-SVN: r159887
This commit is contained in:
Sebastian Pop 2010-05-26 16:47:08 +00:00 • committed by Sebastian Pop
parent e1449456c0
commit 4204425f00
2 changed files with 25 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2010-05-26 Sebastian Pop <sebastian.pop@amd.com>
* tree-if-conv.c (if_convertible_gimple_assign_stmt_p): Do not
special case loop->header.
(is_predicated): New.
(if_convertible_loop_p): Call it.
2010-05-26 Sebastian Pop <sebastian.pop@amd.com>
* tree-if-conv.c (add_to_dst_predicate_list): Do not pass a statemet

21
gcc/tree-if-conv.c
View file

@ -274,9 +274,7 @@ if_convertible_gimple_assign_stmt_p (struct loop *loop, basic_block bb,
return false;
}
/* See if it needs speculative loading or not. */
if (bb != loop->header
&& gimple_assign_rhs_could_trap_p (stmt))
if (gimple_assign_rhs_could_trap_p (stmt))
{
if (dump_file && (dump_flags & TDF_DETAILS))
fprintf (dump_file, "tree could trap...\n");
@ -588,6 +586,19 @@ predicate_bbs (loop_p loop)
return true;
}
/* Returns true when BB has a predicate that is not trivial: true or
NULL_TREE. */
static bool
is_predicated (basic_block bb)
{
tree cond = (tree) bb->aux;
return (cond != NULL_TREE
&& cond != boolean_true_node
&& !integer_onep (cond));
}
/* Return true when LOOP is if-convertible.
LOOP is if-convertible if:
- it is innermost,
@ -682,6 +693,10 @@ if_convertible_loop_p (struct loop *loop)
basic_block bb = ifc_bbs[i];
gimple_stmt_iterator itr;
/* For non predicated BBs, don't check their statements. */
if (!is_predicated (bb))
continue;
for (itr = gsi_start_bb (bb); !gsi_end_p (itr); gsi_next (&itr))
if (!if_convertible_stmt_p (loop, bb, gsi_stmt (itr)))
return false;