re PR tree-optimization/77937 (ICE: in replace_one_candidate, at…

re PR tree-optimization/77937 (ICE: in replace_one_candidate, at gimple-ssa-strength-reduction.c:3370)

2016-10-12  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/77937
	* gimple-ssa-strength-reduction.c (analyze_increments): Use
	POINTER_TYPE_P on the candidate type to determine whether
	candidates in this chain require pointer arithmetic.

From-SVN: r241082

gcc/ChangeLog

+2016-10-12  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
+	PR tree-optimization/77937
+	* gimple-ssa-strength-reduction.c (analyze_increments): Use
+	POINTER_TYPE_P on the candidate type to determine whether
+	candidates in this chain require pointer arithmetic.
+
 2016-10-12  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* config/visium/visium.c (visium_gimplify_va_arg): Emit a big-endian

gcc/gimple-ssa-strength-reduction.c

@@ -2816,8 +2816,7 @@ analyze_increments (slsr_cand_t first_dep, machine_mode mode, bool speed)
       else if (incr == 0
 	       || incr == 1
 	       || (incr == -1
-		   && (gimple_assign_rhs_code (first_dep->cand_stmt)
-		       != POINTER_PLUS_EXPR)))
+		   && !POINTER_TYPE_P (first_dep->cand_type)))
 	incr_vec[i].cost = COST_NEUTRAL;
       
       /* FORNOW: If we need to add an initializer, give up if a cast from