PR tree-optimization/23511

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-loop-niter.c

diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c
index a8e4737..5ecdaeb 100644 (file)
--- 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);