sparc: support mode_b lowering

[r28070]

ir/be/sparc/bearch_sparc.c

@@ -536,15 +536,24 @@ static int sparc_get_reg_class_alignment(const arch_register_class_t *cls)
 	return get_mode_size_bytes(mode);
 }
 
+static ir_node *sparc_create_set(ir_node *cond)
+{
+	return ir_create_cond_set(cond, mode_Iu);
+}
+
 static void sparc_lower_for_target(void)
 {
 	int i;
 	int n_irgs = get_irp_n_irgs();
-
-	/* TODO, doubleword lowering and others */
+	lower_mode_b_config_t lower_mode_b_config = {
+		mode_Iu,
+		sparc_create_set,
+		0,
+	};
 
 	for (i = 0; i < n_irgs; ++i) {
 		ir_graph *irg = get_irp_irg(i);
+		ir_lower_mode_b(irg, &lower_mode_b_config);
 		lower_switch(irg, 256, false);
 	}
 }
@@ -552,9 +561,17 @@ static void sparc_lower_for_target(void)
 static int sparc_is_mux_allowed(ir_node *sel, ir_node *mux_false,
                                 ir_node *mux_true)
 {
-	(void) sel;
-	(void) mux_false;
-	(void) mux_true;
+	ir_graph *irg  = get_irn_irg(sel);
+	ir_mode  *mode = get_irn_mode(mux_true);
+
+	if (get_irg_phase_state(irg) == phase_low)
+		return false;
+
+	if (!mode_is_int(mode) && !mode_is_reference(mode) && mode != mode_b)
+		return false;
+	if (is_Const(mux_true) && is_Const_one(mux_true) &&
+			is_Const(mux_false) && is_Const_null(mux_false))
+		return true;
 	return false;
 }
 

ir/be/sparc/sparc_emitter.c

@@ -451,9 +451,6 @@ static const ir_node *pick_delay_slot_for(const ir_node *node)
 	while (sched_has_prev(schedpoint)) {
 		schedpoint = sched_prev(schedpoint);
 
-		if (tries++ >= PICK_DELAY_SLOT_MAX_DISTANCE)
-			break;
-
 		if (has_delay_slot(schedpoint))
 			break;
 
@@ -461,6 +458,9 @@ static const ir_node *pick_delay_slot_for(const ir_node *node)
 		if (is_no_instruction(schedpoint))
 			continue;
 
+		if (tries++ >= PICK_DELAY_SLOT_MAX_DISTANCE)
+			break;
+
 		if (emits_multiple_instructions(schedpoint))
 			continue;
 

ir/be/sparc/sparc_transform.c

@@ -1132,14 +1132,18 @@ static ir_node *gen_Conv(ir_node *node)
 {
 	ir_node  *block    = be_transform_node(get_nodes_block(node));
 	ir_node  *op       = get_Conv_op(node);
-	ir_node  *new_op   = be_transform_node(op);
 	ir_mode  *src_mode = get_irn_mode(op);
 	ir_mode  *dst_mode = get_irn_mode(node);
 	dbg_info *dbg      = get_irn_dbg_info(node);
+	ir_node  *new_op;
 
 	int src_bits = get_mode_size_bits(src_mode);
 	int dst_bits = get_mode_size_bits(dst_mode);
 
+	if (src_mode == mode_b)
+		panic("ConvB not lowered %+F", node);
+
+	new_op = be_transform_node(op);
 	if (src_mode == dst_mode)
 		return new_op;
 
@@ -1165,6 +1169,8 @@ static ir_node *gen_Conv(ir_node *node)
 			}
 			return create_itof(dbg, block, new_op, dst_mode);
 		}
+	} else if (src_mode == mode_b) {
+		panic("ConvB not lowered %+F", node);
 	} else { /* complete in gp registers */
 		int min_bits;
 		ir_mode *min_mode;

ir/lower/lower_mode_b.c

@@ -149,9 +149,6 @@ ir_node *ir_create_cond_set(ir_node *cond_value, ir_mode *dest_mode)
 
 	set_irn_in(lower_block, ARRAY_SIZE(lower_in), lower_in);
 	phi = new_r_Phi(lower_block, ARRAY_SIZE(phi_in), phi_in, dest_mode);
-	assert(get_Block_phis(lower_block) == NULL);
-	set_Block_phis(lower_block, phi);
-	set_Phi_next(phi, NULL);
 
 	/* make sure we do visit the cond_value later... */
 	ARR_APP1(ir_node*, check_later, cond_value);