ranger: Grow BBs in relation oracle as needed [PR113735]

The relation oracle grows the internal vector of SSAs as needed, but
due to an oversight was not growing the basic block vector.  This
fixes the oversight.

	PR tree-optimization/113735

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/pr113735.c: New test.

gcc/ChangeLog:

	* value-relation.cc (equiv_oracle::add_equiv_to_block): Call
	limit_check().

gcc/testsuite/gcc.dg/tree-ssa/pr113735.c

@@ -0,0 +1,19 @@
+// { dg-do compile { target bitint } }
+// { dg-options "-O1" }
+
+char b;
+void bar (void);
+
+#if __BITINT_MAXWIDTH__ >= 6110
+void
+foo (_BitInt(6110) j)
+{
+  for (;;)
+    {
+      _BitInt(10) k = b % j;
+      for (j = 6; j; --j)
+        if (k)
+          bar ();
+    }
+}
+#endif

gcc/value-relation.cc

@@ -718,6 +718,7 @@ equiv_oracle::add_equiv_to_block (basic_block bb, bitmap equiv_set)
 
   // Check if this is the first time a block has an equivalence added.
   // and create a header block. And set the summary for this block.
+  limit_check (bb);
   if (!m_equiv[bb->index])
     {
       ptr = (equiv_chain *) obstack_alloc (&m_chain_obstack,