Added Dummy node which does not CSE with anything

[libfirm] / ir / opt / opt_blocks.c

diff --git a/ir/opt/opt_blocks.c b/ir/opt/opt_blocks.c
index 7b7c4a9..4ad1b95 100644 (file)
--- a/ir/opt/opt_blocks.c
+++ b/ir/opt/opt_blocks.c
@@ -64,6 +64,7 @@ struct opcode_key_t {
                tarval          *tv;    /**< For Const nodes, its tarval */
                symconst_symbol sym;    /**< For SymConst nodes, its symbol .*/
                void            *addr;  /**< Alias all addresses. */
+               int             intVal; /**< For Conv/Div nodes: strict/remainderless. */
        } u;
 };
 
@@ -250,6 +251,7 @@ static listmap_entry_t *listmap_find(listmap_t *map, void *id) {
  * @return a hash value for the given opcode map entry
  */
 static unsigned opcode_hash(const opcode_key_t *entry) {
+       /* assume long >= int */
        return (entry->mode - (ir_mode *)0) * 9 + entry->code + entry->u.proj * 3 + HASH_PTR(entry->u.addr) + entry->arity;
 }  /* opcode_hash */
 
@@ -404,6 +406,12 @@ static opcode_key_t *opcode(const node_t *node, environment_t *env) {
        case iro_Const:
                key.u.tv  = get_Const_tarval(irn);
                break;
+       case iro_Conv:
+               key.u.intVal = get_Conv_strict(irn);
+               break;
+       case iro_Div:
+               key.u.intVal = is_Div_remainderless(irn);
+               break;
        default:
                break;
        }
@@ -452,7 +460,7 @@ static partition_t *split(partition_t *Z, block_t *g, environment_t *env) {
 }  /* split */
 
 /**
- * Rteurn non-zero if pred should be tread as a input node.
+ * Return non-zero if pred should be tread as a input node.
  */
 static int is_input_node(ir_node *pred, ir_node *irn, int index) {
        /* for now, do NOT turn direct calls into indirect one */