1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/vec.h b/gcc/vec.h
index e6c42bc0a60..a652250112d 100644
--- a/gcc/vec.h
+++ b/gcc/vec.h
@@ -190,6 +190,13 @@ along with GCC; see the file COPYING3.  If not see
 
 #define VEC_iterate(T,V,I,P)	(VEC_OP(T,base,iterate)(VEC_BASE(V),I,&(P)))
 
+/* Convenience macro for reverse iteration.  */
+
+#define FOR_EACH_VEC_ELT_REVERSE(T,V,I,P) \
+  for (I = VEC_length (T, (V)) - 1;           \
+       VEC_iterate (T, (V), (I), (P));	  \
+       (I)--)
+
 /* Allocate new vector.
    VEC(T,A) *VEC_T_A_alloc(int reserve);