The following fixes dangling SSA names running havoc with
"simple" out-of-SSA coalescing.
Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
Richard.
2017-03-20 Richard Biener <rguent...@suse.de>
PR tree-optimization/80113
* graphite-isl-ast-to-gimple.c (copy_loop_phi_nodes): Do not
allocate extra SSA name for PHI def.
(add_close_phis_to_outer_loops): Likewise.
(add_close_phis_to_merge_points): Likewise.
(copy_loop_close_phi_args): Likewise.
(copy_cond_phi_nodes): Likewise.
Index: gcc/graphite-isl-ast-to-gimple.c
===================================================================
--- gcc/graphite-isl-ast-to-gimple.c (revision 246224)
+++ gcc/graphite-isl-ast-to-gimple.c (working copy)
@@ -1891,7 +1891,7 @@ copy_loop_phi_nodes (basic_block bb, bas
if (is_gimple_reg (res) && scev_analyzable_p (res, region->region))
continue;
- gphi *new_phi = create_phi_node (SSA_NAME_VAR (res), new_bb);
+ gphi *new_phi = create_phi_node (NULL_TREE, new_bb);
tree new_res = create_new_def_for (res, new_phi,
gimple_phi_result_ptr (new_phi));
set_rename (res, new_res);
@@ -1991,7 +1991,7 @@ add_close_phis_to_outer_loops (tree last
if (!bb_contains_loop_close_phi_nodes (bb) || !single_succ_p (bb))
bb = split_edge (e);
- gphi *close_phi = create_phi_node (SSA_NAME_VAR (last_merge_name), bb);
+ gphi *close_phi = create_phi_node (NULL_TREE, bb);
tree res = create_new_def_for (last_merge_name, close_phi,
gimple_phi_result_ptr (close_phi));
set_rename (old_close_phi_name, res);
@@ -2036,7 +2036,7 @@ add_close_phis_to_merge_points (gphi *ol
last_merge_name = add_close_phis_to_outer_loops (last_merge_name,
merge_e,
old_close_phi);
- gphi *merge_phi = create_phi_node (SSA_NAME_VAR (old_close_phi_name),
new_merge_bb);
+ gphi *merge_phi = create_phi_node (NULL_TREE, new_merge_bb);
tree merge_res = create_new_def_for (old_close_phi_name, merge_phi,
gimple_phi_result_ptr (merge_phi));
set_rename (old_close_phi_name, merge_res);
@@ -2089,7 +2089,7 @@ copy_loop_close_phi_args (basic_block ol
/* Loop close phi nodes should not be scev_analyzable_p. */
gcc_unreachable ();
- gphi *new_close_phi = create_phi_node (SSA_NAME_VAR (res), new_bb);
+ gphi *new_close_phi = create_phi_node (NULL_TREE, new_bb);
tree new_res = create_new_def_for (res, new_close_phi,
gimple_phi_result_ptr (new_close_phi));
set_rename (res, new_res);
@@ -2472,7 +2472,7 @@ copy_cond_phi_nodes (basic_block bb, bas
if (virtual_operand_p (res))
continue;
- gphi *new_phi = create_phi_node (SSA_NAME_VAR (res), new_bb);
+ gphi *new_phi = create_phi_node (NULL_TREE, new_bb);
tree new_res = create_new_def_for (res, new_phi,
gimple_phi_result_ptr (new_phi));
set_rename (res, new_res);
