re PR tree-optimization/68799 (lto ICE on powerpc64le-linux-gnu builing python 2.7.x)

2016-01-17  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/68799
	* gimple-ssa-strength-reduction.c (create_phi_basis): Directly
	look up phi candidates in the statement-candidate map.
	(phi_add_costs): Likewise.
	(record_phi_increments): Likewise.
	(phi_incr_cost): Likewise.
	(ncd_with_phi): Likewise.
	(all_phi_incrs_profitable): Likewise.

From-SVN: r232491

gcc/ChangeLog

+2016-01-17  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
+	PR tree-optimization/68799
+	* gimple-ssa-strength-reduction.c (create_phi_basis): Directly
+	look up phi candidates in the statement-candidate map.
+	(phi_add_costs): Likewise.
+	(record_phi_increments): Likewise.
+	(phi_incr_cost): Likewise.
+	(ncd_with_phi): Likewise.
+	(all_phi_incrs_profitable): Likewise.
+
 2016-01-17  Jakub Jelinek  <jakub@redhat.com>
 
 	* omp-low.c (mark_loops_in_oacc_kernels_region): Work around

gcc/gimple-ssa-strength-reduction.c

@@ -2230,7 +2230,7 @@ create_phi_basis (slsr_cand_t c, gimple *from_phi, tree basis_name,
   slsr_cand_t basis = lookup_cand (c->basis);
   int nargs = gimple_phi_num_args (from_phi);
   basic_block phi_bb = gimple_bb (from_phi);
-  slsr_cand_t phi_cand = base_cand_from_table (gimple_phi_result (from_phi));
+  slsr_cand_t phi_cand = *stmt_cand_map->get (from_phi);
   auto_vec<tree> phi_args (nargs);
 
   /* Process each argument of the existing phi that represents
@@ -2339,7 +2339,7 @@ phi_add_costs (gimple *phi, slsr_cand_t c, int one_add_cost)
 {
   unsigned i;
   int cost = 0;
-  slsr_cand_t phi_cand = base_cand_from_table (gimple_phi_result (phi));
+  slsr_cand_t phi_cand = *stmt_cand_map->get (phi);
 
   /* If we work our way back to a phi that isn't dominated by the hidden
      basis, this isn't a candidate for replacement.  Indicate this by
@@ -2550,7 +2550,7 @@ static void
 record_phi_increments (slsr_cand_t basis, gimple *phi)
 {
   unsigned i;
-  slsr_cand_t phi_cand = base_cand_from_table (gimple_phi_result (phi));
+  slsr_cand_t phi_cand = *stmt_cand_map->get (phi);
   
   for (i = 0; i < gimple_phi_num_args (phi); i++)
     {
@@ -2622,7 +2622,7 @@ phi_incr_cost (slsr_cand_t c, const widest_int &incr, gimple *phi,
   unsigned i;
   int cost = 0;
   slsr_cand_t basis = lookup_cand (c->basis);
-  slsr_cand_t phi_cand = base_cand_from_table (gimple_phi_result (phi));
+  slsr_cand_t phi_cand = *stmt_cand_map->get (phi);
 
   for (i = 0; i < gimple_phi_num_args (phi); i++)
     {
@@ -2966,7 +2966,7 @@ ncd_with_phi (slsr_cand_t c, const widest_int &incr, gphi *phi,
 {
   unsigned i;
   slsr_cand_t basis = lookup_cand (c->basis);
-  slsr_cand_t phi_cand = base_cand_from_table (gimple_phi_result (phi));
+  slsr_cand_t phi_cand = *stmt_cand_map->get (phi);
 
   for (i = 0; i < gimple_phi_num_args (phi); i++)
     {
@@ -3176,7 +3176,7 @@ all_phi_incrs_profitable (slsr_cand_t c, gimple *phi)
 {
   unsigned i;
   slsr_cand_t basis = lookup_cand (c->basis);
-  slsr_cand_t phi_cand = base_cand_from_table (gimple_phi_result (phi));
+  slsr_cand_t phi_cand = *stmt_cand_map->get (phi);
 
   for (i = 0; i < gimple_phi_num_args (phi); i++)
     {