middle-end: Fix unexpected warnings for RISC-V port.

gcc/ChangeLog:

	* tree-vect-loop-manip.cc (vect_gen_vector_loop_niters): Simply
	initialize const_vf to 0.

diff --git a/gcc/tree-vect-loop-manip.cc b/gcc/tree-vect-loop-manip.cc
index 86d2264054ae120d59694a2a2c5a96d5b9eea8c0..48a5f391d7f21d7758dc66d381bbbe3ea5803247 100644 (file)
--- a/gcc/tree-vect-loop-manip.cc
+++ b/gcc/tree-vect-loop-manip.cc
@@ -1978,7 +1978,8 @@ vect_gen_vector_loop_niters (loop_vec_info loop_vinfo, tree niters,
   else
     ni_minus_gap = niters;
 
-  unsigned HOST_WIDE_INT const_vf;
+  /* To silence some unexpected warnings, simply initialize to 0. */
+  unsigned HOST_WIDE_INT const_vf = 0;
   if (vf.is_constant (&const_vf)
       && !LOOP_VINFO_USING_PARTIAL_VECTORS_P (loop_vinfo))
     {