diff --git a/gcc/testsuite/gcc.dg/torture/pr99947.c b/gcc/testsuite/gcc.dg/torture/pr99947.c
new file mode 100644
index 0000000000000000000000000000000000000000..2cf3ec6aeb80d943823cb1fe63b6860544373249
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr99947.c
@@ -0,0 +1,18 @@
+/* { dg-do compile } */
+
+int a, b, d, e;
+short c;
+void f() {
+  for (; e; e++) {
+    int g = 6;
+    for (; g > 2; g--) {
+      int i = -8;
+      while (i < 20) {
+        i += 5;
+        a += b;
+      }
+      c *= d;
+    }
+    b--;
+  }
+}
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 4e928c65b31706cbafd6400952c4e39043248943..93fa2928e001c154bd4a9a73ac1dbbbf73c456df 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -8202,11 +8202,12 @@ vectorizable_induction (loop_vec_info loop_vinfo,
 	  /* Fill up to the number of vectors we need for the whole group.  */
 	  nivs = least_common_multiple (group_size,
 					const_nunits) / const_nunits;
+	  vec_steps.reserve (nivs-ivn);
 	  for (; ivn < nivs; ++ivn)
 	    {
 	      SLP_TREE_VEC_STMTS (slp_node)
 		.quick_push (SLP_TREE_VEC_STMTS (slp_node)[0]);
-	      vec_steps.safe_push (vec_steps[0]);
+	      vec_steps.quick_push (vec_steps[0]);
 	    }
 	}