}
unsigned v = SSA_NAME_VERSION (ssa);
- bitmap b = BITMAP_ALLOC (&m_bitmaps);
- bitmap_set_bit (b, v);
- equiv_chain *ptr = (equiv_chain *) obstack_alloc (&m_chain_obstack,
- sizeof (equiv_chain));
- ptr->m_names = b;
- ptr->m_bb = NULL;
- ptr->m_next = m_equiv.m_next;
- m_equiv.m_next = ptr;
- bitmap_ior_into (m_equiv.m_names, b);
- // Walk the relation list an remove SSA from any relations.
+ // Walk the equivalency list and remove SSA from any equivalencies.
+ if (bitmap_bit_p (m_equiv.m_names, v))
+ {
+ bitmap_clear_bit (m_equiv.m_names, v);
+ for (equiv_chain *ptr = m_equiv.m_next; ptr; ptr = ptr->m_next)
+ if (bitmap_bit_p (ptr->m_names, v))
+ bitmap_clear_bit (ptr->m_names, v);
+ }
+
+ // Walk the relation list and remove SSA from any relations.
if (!bitmap_bit_p (m_relations.m_names, v))
return;