fixed bitfield lowering: do not touch Load/Store that are NO bitfields

[r15393]

diff --git a/ir/lower/lower_hl.c b/ir/lower/lower_hl.c
index 09eb960..f30e76d 100644 (file)
--- a/ir/lower/lower_hl.c
+++ b/ir/lower/lower_hl.c
@@ -363,9 +363,12 @@ 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;
+       bit_offset += 8 * offset;
 
        /*
         * ok, here we are: now convert the Proj_mode_bf(Load) into And(Shr(Proj_mode(Load)) for unsigned
@@ -451,12 +454,15 @@ 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;
+       bit_offset += 8 * offset;
 
        bits_mask = get_mode_size_bits(mode) - bf_bits;
        mask = ((unsigned)-1) >> bits_mask;