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tree-vect-loop.c (destroy_loop_vec_info): Handle cond_expr.

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* tree-vect-loop.c (destroy_loop_vec_info): Handle cond_expr.
	(vect_is_simple_reduction): Swap cond_reduction by inversion.

From-SVN: r241810
This commit is contained in:
Bin Cheng 2016-11-03 09:15:45 +00:00 committed by Bin Cheng
parent f03f023275
commit c12176d716
2 changed files with 67 additions and 23 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-11-03 Bin Cheng <bin.cheng@arm.com>
* tree-vect-loop.c (destroy_loop_vec_info): Handle cond_expr.
(vect_is_simple_reduction): Swap cond_reduction by inversion.
2016-11-02 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.c (ix86_init_libfuncs): New. Call

85
gcc/tree-vect-loop.c
View File

@ -1225,6 +1225,27 @@ destroy_loop_vec_info (loop_vec_info loop_vinfo, bool clean_stmts)
swap_ssa_operands (stmt,
gimple_assign_rhs1_ptr (stmt),
gimple_assign_rhs2_ptr (stmt));
else if (code == COND_EXPR
&& CONSTANT_CLASS_P (gimple_assign_rhs2 (stmt)))
{
tree cond_expr = gimple_assign_rhs1 (stmt);
enum tree_code cond_code = TREE_CODE (cond_expr);
if (TREE_CODE_CLASS (cond_code) == tcc_comparison)
{
bool honor_nans = HONOR_NANS (TREE_OPERAND (cond_expr,
0));
cond_code = invert_tree_comparison (cond_code,
honor_nans);
if (cond_code != ERROR_MARK)
{
TREE_SET_CODE (cond_expr, cond_code);
swap_ssa_operands (stmt,
gimple_assign_rhs2_ptr (stmt),
gimple_assign_rhs3_ptr (stmt));
}
}
}
}
/* Free stmt_vec_info. */
@ -3006,38 +3027,56 @@ vect_is_simple_reduction (loop_vec_info loop_info, gimple *phi,
&& (code == COND_EXPR
|| !def2 || gimple_nop_p (def2)
|| !flow_bb_inside_loop_p (loop, gimple_bb (def2))
|| (def2 && flow_bb_inside_loop_p (loop, gimple_bb (def2))
&& (is_gimple_assign (def2)
|| (def2 && flow_bb_inside_loop_p (loop, gimple_bb (def2))
&& (is_gimple_assign (def2)
|| is_gimple_call (def2)
|| STMT_VINFO_DEF_TYPE (vinfo_for_stmt (def2))
== vect_induction_def
|| (gimple_code (def2) == GIMPLE_PHI
|| STMT_VINFO_DEF_TYPE (vinfo_for_stmt (def2))
== vect_induction_def
|| (gimple_code (def2) == GIMPLE_PHI
&& STMT_VINFO_DEF_TYPE (vinfo_for_stmt (def2))
== vect_internal_def
== vect_internal_def
&& !is_loop_header_bb_p (gimple_bb (def2)))))))
{
if (check_reduction
&& orig_code != MINUS_EXPR)
{
if (check_reduction && orig_code != MINUS_EXPR)
{
/* Check if we can swap operands (just for simplicity - so that
the rest of the code can assume that the reduction variable
is always the last (second) argument). */
if (code == COND_EXPR)
{
/* No current known use where this case would be useful. */
if (dump_enabled_p ())
report_vect_op (MSG_NOTE, def_stmt,
"detected reduction: cannot currently swap "
"operands for cond_expr");
return NULL;
/* Swap cond_expr by inverting the condition. */
tree cond_expr = gimple_assign_rhs1 (def_stmt);
enum tree_code invert_code = ERROR_MARK;
enum tree_code cond_code = TREE_CODE (cond_expr);
if (TREE_CODE_CLASS (cond_code) == tcc_comparison)
{
bool honor_nans = HONOR_NANS (TREE_OPERAND (cond_expr, 0));
invert_code = invert_tree_comparison (cond_code, honor_nans);
}
if (invert_code != ERROR_MARK)
{
TREE_SET_CODE (cond_expr, invert_code);
swap_ssa_operands (def_stmt,
gimple_assign_rhs2_ptr (def_stmt),
gimple_assign_rhs3_ptr (def_stmt));
}
else
{
if (dump_enabled_p ())
report_vect_op (MSG_NOTE, def_stmt,
"detected reduction: cannot swap operands "
"for cond_expr");
return NULL;
}
}
else
swap_ssa_operands (def_stmt, gimple_assign_rhs1_ptr (def_stmt),
gimple_assign_rhs2_ptr (def_stmt));
/* Swap operands (just for simplicity - so that the rest of the code
can assume that the reduction variable is always the last (second)
argument). */
if (dump_enabled_p ())
if (dump_enabled_p ())
report_vect_op (MSG_NOTE, def_stmt,
"detected reduction: need to swap operands: ");
swap_ssa_operands (def_stmt, gimple_assign_rhs1_ptr (def_stmt),
gimple_assign_rhs2_ptr (def_stmt));
"detected reduction: need to swap operands: ");
if (CONSTANT_CLASS_P (gimple_assign_rhs1 (def_stmt)))
LOOP_VINFO_OPERANDS_SWAPPED (loop_info) = true;