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-rw-r--r--gcc/tree-ssa-loop-niter.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c
index a8e4737..5ecdaeb 100644
--- a/gcc/tree-ssa-loop-niter.c
+++ b/gcc/tree-ssa-loop-niter.c
@@ -1460,7 +1460,9 @@ infer_loop_bounds_from_undefined (struct loop *loop)
if (init == NULL_TREE
|| step == NULL_TREE
|| TREE_CODE (init) != INTEGER_CST
- || TREE_CODE (step) != INTEGER_CST)
+ || TREE_CODE (step) != INTEGER_CST
+ || TYPE_MIN_VALUE (type) == NULL_TREE
+ || TYPE_MAX_VALUE (type) == NULL_TREE)
break;
utype = unsigned_type_for (type);