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-rw-r--r--gcc/lambda-code.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/lambda-code.c b/gcc/lambda-code.c
index cedc8cd129f..6dbbe6d8b8b 100644
--- a/gcc/lambda-code.c
+++ b/gcc/lambda-code.c
@@ -2182,9 +2182,9 @@ replace_uses_equiv_to_x_with_y (struct loop *loop, tree stmt, tree x,
access_fn = instantiate_parameters
(loop, analyze_scalar_evolution (loop, use));
- if (access_fn != NULL_TREE)
+ if (access_fn != NULL_TREE && access_fn != chrec_dont_know)
step = evolution_part_in_loop_num (access_fn, loop->num);
- if ((step && int_cst_value (step) == xstep)
+ if ((step && step != chrec_dont_know && int_cst_value (step) == xstep)
|| USE_FROM_PTR (use_p) == x)
SET_USE (use_p, y);
}