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

[gcc.git] / gcc / gimple-ssa-strength-reduction.c

diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c
index cfa50d34ad002b3f48d0a3eb5eb6799dafba2648..72862f851442a19e68f2578b1e7a3633ce657114 100644 (file)
--- a/gcc/gimple-ssa-strength-reduction.c
+++ b/gcc/gimple-ssa-strength-reduction.c
@@ -2818,6 +2818,11 @@ analyze_increments (slsr_cand_t first_dep, machine_mode mode, bool speed)
               || (incr == -1
                   && !POINTER_TYPE_P (first_dep->cand_type)))
        incr_vec[i].cost = COST_NEUTRAL;
+
+      /* FIXME: We don't handle pointers with a -1 increment yet.
+         They are usually unprofitable anyway.  */
+      else if (incr == -1 && POINTER_TYPE_P (first_dep->cand_type))
+       incr_vec[i].cost = COST_INFINITE;
       
       /* FORNOW: If we need to add an initializer, give up if a cast from
         the candidate's type to its stride's type can lose precision.