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tree-vect-loop.c (get_initial_def_for_induction): Properly generate vector constants.

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2013-04-11  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (get_initial_def_for_induction): Properly
	generate vector constants.

From-SVN: r197803
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Richard Biener 2013-04-11 14:03:09 +00:00 • committed by Richard Biener
parent f6fcbc56da
commit 1d42c1ec47
2 changed files with 24 additions and 13 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2013-04-11 Richard Biener <rguenther@suse.de>
* tree-vect-loop.c (get_initial_def_for_induction): Properly
generate vector constants.
2013-04-11 Richard Biener <rguenther@suse.de>
PR tree-optimization/56878

32
gcc/tree-vect-loop.c
View file

@ -3226,30 +3226,36 @@ get_initial_def_for_induction (gimple iv_phi)
}
vec_alloc (v, nunits);
bool constant_p = is_gimple_min_invariant (new_name);
CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, new_name);
for (i = 1; i < nunits; i++)
{
/* Create: new_name_i = new_name + step_expr */
enum tree_code code = POINTER_TYPE_P (scalar_type)
? POINTER_PLUS_EXPR : PLUS_EXPR;
init_stmt = gimple_build_assign_with_ops (code, new_var,
new_name, step_expr);
new_name = make_ssa_name (new_var, init_stmt);
gimple_assign_set_lhs (init_stmt, new_name);
new_bb = gsi_insert_on_edge_immediate (pe, init_stmt);
gcc_assert (!new_bb);
if (dump_enabled_p ())
new_name = fold_build2 (code, scalar_type, new_name, step_expr);
if (!is_gimple_min_invariant (new_name))
{
dump_printf_loc (MSG_NOTE, vect_location,
"created new init_stmt: ");
dump_gimple_stmt (MSG_NOTE, TDF_SLIM, init_stmt, 0);
init_stmt = gimple_build_assign (new_var, new_name);
new_name = make_ssa_name (new_var, init_stmt);
gimple_assign_set_lhs (init_stmt, new_name);
new_bb = gsi_insert_on_edge_immediate (pe, init_stmt);
gcc_assert (!new_bb);
if (dump_enabled_p ())
{
dump_printf_loc (MSG_NOTE, vect_location,
"created new init_stmt: ");
dump_gimple_stmt (MSG_NOTE, TDF_SLIM, init_stmt, 0);
}
constant_p = false;
}
CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, new_name);
}
/* Create a vector from [new_name_0, new_name_1, ..., new_name_nunits-1] */
new_vec = build_constructor (vectype, v);
if (constant_p)
new_vec = build_vector_from_ctor (vectype, v);
else
new_vec = build_constructor (vectype, v);
vec_init = vect_init_vector (iv_phi, new_vec, vectype, NULL);
}