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-rw-r--r--gcc/tree-ssa-loop-niter.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop-niter.c b/gcc/tree-ssa-loop-niter.c
index 84e6e31..f513859 100644
--- a/gcc/tree-ssa-loop-niter.c
+++ b/gcc/tree-ssa-loop-niter.c
@@ -2830,6 +2830,27 @@ finite_loop_p (struct loop *loop)
loop->num);
return true;
}
+
+ if (flag_finite_loops)
+ {
+ unsigned i;
+ vec<edge> exits = get_loop_exit_edges (loop);
+ edge ex;
+
+ /* If the loop has a normal exit, we can assume it will terminate. */
+ FOR_EACH_VEC_ELT (exits, i, ex)
+ if (!(ex->flags & (EDGE_EH | EDGE_ABNORMAL | EDGE_FAKE)))
+ {
+ exits.release ();
+ if (dump_file)
+ fprintf (dump_file, "Assume loop %i to be finite: it has an exit "
+ "and -ffinite-loops is on.\n", loop->num);
+ return true;
+ }
+
+ exits.release ();
+ }
+
return false;
}