X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Flower%2Flower_hl.c;h=38d1e4b168be9745c274f570f312acbbe3b0f3aa;hb=eb0672129c35f41c7d1e9efdeb4835585947d33b;hp=09eb96068cacc8a022d6f4b716f575f879c47d82;hpb=5fa28fab4163f46880424becee219225e0edcb06;p=libfirm

diff --git a/ir/lower/lower_hl.c b/ir/lower/lower_hl.c
index 09eb96068..38d1e4b16 100644
--- a/ir/lower/lower_hl.c
+++ b/ir/lower/lower_hl.c
@@ -352,6 +352,10 @@ static void lower_bitfields_loads(ir_node *proj, ir_node *load) {
 	ent     = get_Sel_entity(sel);
 	bf_type = get_entity_type(ent);
 
+	/* must be a bitfield type */
+	if (!is_Primitive_type(bf_type) || get_primitive_base_type(bf_type) == NULL)
+		return;
+
 	/* We have a bitfield access, if either a bit offset is given, or
 	   the size is not integral. */
 	bf_mode = get_type_mode(bf_type);
@@ -363,9 +367,11 @@ static void lower_bitfields_loads(ir_node *proj, ir_node *load) {
 	bf_bits    = get_mode_size_bits(bf_mode);
 	bit_offset = get_entity_offset_bits_remainder(ent);
 
+	if (bit_offset == 0 && is_integral_size(bf_bits) && bf_mode == get_Load_mode(load))
+		return;
+
 	bits   = get_mode_size_bits(mode);
 	offset = get_entity_offset(ent);
-  bit_offset += 8 * offset;
 
 	/*
 	 * ok, here we are: now convert the Proj_mode_bf(Load) into And(Shr(Proj_mode(Load)) for unsigned
@@ -375,6 +381,7 @@ static void lower_bitfields_loads(ir_node *proj, ir_node *load) {
 	/* abandon bitfield sel */
 	ptr = get_Sel_ptr(sel);
 	db  = get_irn_dbg_info(sel);
+	ptr = new_rd_Add(db, current_ir_graph, block, ptr, new_Const_long(mode_Is, offset), get_irn_mode(ptr));
 
 	set_Load_ptr(load, ptr);
 	set_Load_mode(load, mode);
@@ -438,6 +445,10 @@ static void lower_bitfields_stores(ir_node *store) {
 	ent     = get_Sel_entity(sel);
 	bf_type = get_entity_type(ent);
 
+	/* must be a bitfield type */
+	if (!is_Primitive_type(bf_type) || get_primitive_base_type(bf_type) == NULL)
+		return;
+
 	/* We have a bitfield access, if either a bit offset is given, or
 	   the size is not integral. */
 	bf_mode = get_type_mode(bf_type);
@@ -451,12 +462,14 @@ static void lower_bitfields_stores(ir_node *store) {
 	bf_bits    = get_mode_size_bits(bf_mode);
 	bit_offset = get_entity_offset_bits_remainder(ent);
 
+	if (bit_offset == 0 && is_integral_size(bf_bits) && bf_mode == get_irn_mode(value))
+		return;
+
 	/*
 	 * ok, here we are: now convert the Store(Sel(), value) into Or(And(Load(Sel),c), And(Value,c))
 	 */
 	mem        = get_Store_mem(store);
 	offset     = get_entity_offset(ent);
-  bit_offset += 8 * offset;
 
 	bits_mask = get_mode_size_bits(mode) - bf_bits;
 	mask = ((unsigned)-1) >> bits_mask;
@@ -466,6 +479,7 @@ static void lower_bitfields_stores(ir_node *store) {
 	/* abandon bitfield sel */
 	ptr = get_Sel_ptr(sel);
 	db  = get_irn_dbg_info(sel);
+	ptr = new_rd_Add(db, current_ir_graph, block, ptr, new_Const_long(mode_Is, offset), get_irn_mode(ptr));
 
 	if (neg_mask) {
 		/* there are some bits, normal case */
@@ -492,6 +506,20 @@ static void lower_bitfields_stores(ir_node *store) {
 	set_Store_ptr(store, ptr);
 }  /* lower_bitfields_stores */
 
+/**
+ * Lowers unaligned Loads.
+ */
+static void lower_unaligned_Load(ir_node *load) {
+	/* NYI */
+}
+
+/**
+ * Lowers unaligned Stores
+ */
+static void lower_unaligned_Store(ir_node *store) {
+	/* NYI */
+}
+
 /**
  * lowers IR-nodes, called from walker
  */
@@ -504,6 +532,14 @@ static void lower_irnode(ir_node *irn, void *env) {
 	case iro_SymConst:
 		lower_symconst(irn);
 		break;
+	case iro_Load:
+		if (env != NULL && get_Load_align(irn) == align_non_aligned)
+			lower_unaligned_Load(irn);
+		break;
+	case iro_Store:
+		if (env != NULL && get_Store_align(irn) == align_non_aligned)
+			lower_unaligned_Store(irn);
+		break;
 	default:
 		break;
 	}
@@ -549,7 +585,7 @@ void lower_highlevel(void) {
 		/* First step: lower bitfield access: must be run as long as Sels still exists. */
 		irg_walk_graph(irg, NULL, lower_bf_access, NULL);
 
-		/* Finally: lower SymConst-Size and Sel nodes. */
+		/* Finally: lower SymConst-Size and Sel nodes, unaligned Load/Stores. */
 		irg_walk_graph(irg, NULL, lower_irnode, NULL);
 
 		set_irg_phase_low(irg);