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.

OK for trunk?

	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

@@ -687,6 +687,7 @@ 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,