fix the reload folding mode stuff in a more correct way

[libfirm] / ir / be / ia32 / bearch_ia32.c

diff --git a/ir/be/ia32/bearch_ia32.c b/ir/be/ia32/bearch_ia32.c
index 5923ae9..1db15bf 100644 (file)
--- a/ir/be/ia32/bearch_ia32.c
+++ b/ir/be/ia32/bearch_ia32.c
@@ -839,6 +839,9 @@ static int ia32_possible_memory_operand(const ir_node *irn, unsigned int i) {
 static void ia32_perform_memory_operand(ir_node *irn, ir_node *spill,
                                         unsigned int i)
 {
+       ir_mode *load_mode;
+       ir_mode *dest_op_mode;
+
        ia32_code_gen_t *cg = ia32_current_cg;
 
        assert(ia32_possible_memory_operand(irn, i) && "Cannot perform memory operand change");
@@ -848,13 +851,19 @@ static void ia32_perform_memory_operand(ir_node *irn, ir_node *spill,
        }
 
        set_ia32_op_type(irn, ia32_AddrModeS);
-       set_ia32_ls_mode(irn, get_irn_mode(get_irn_n(irn, i)));
+
+       load_mode    = get_irn_mode(get_irn_n(irn, i));
+       dest_op_mode = get_ia32_ls_mode(irn);
+       if (get_mode_size_bits(load_mode) <= get_mode_size_bits(dest_op_mode)) {
+               set_ia32_ls_mode(irn, load_mode);
+       }
        set_ia32_use_frame(irn);
        set_ia32_need_stackent(irn);
 
        set_irn_n(irn, n_ia32_base, get_irg_frame(get_irn_irg(irn)));
        set_irn_n(irn, n_ia32_binary_right, ia32_get_admissible_noreg(cg, irn, n_ia32_binary_right));
        set_irn_n(irn, n_ia32_mem, spill);
+       set_ia32_is_reload(irn);
 
        /* immediates are only allowed on the right side */
        if (i == n_ia32_binary_left && is_ia32_Immediate(get_irn_n(irn, n_ia32_binary_left))) {
@@ -1425,7 +1434,11 @@ static void ia32_collect_frame_entity_nodes(ir_node *node, void *data)
                if (is_ia32_need_stackent(node) || is_ia32_Load(node)) {
                        const ir_mode     *mode  = get_ia32_ls_mode(node);
                        const ia32_attr_t *attr  = get_ia32_attr_const(node);
-                       int                align = get_mode_size_bytes(mode);
+                       int                align;
+
+                       if (is_ia32_is_reload(node)) {
+                               mode = get_spill_mode_mode(mode);
+                       }
 
                        if(attr->data.need_64bit_stackent) {
                                mode = mode_Ls;
@@ -1433,6 +1446,7 @@ static void ia32_collect_frame_entity_nodes(ir_node *node, void *data)
                        if(attr->data.need_32bit_stackent) {
                                mode = mode_Is;
                        }
+                       align = get_mode_size_bytes(mode);
                        be_node_needs_frame_entity(env, node, mode, align);
                } else if (is_ia32_vfild(node) || is_ia32_xLoad(node)
                           || is_ia32_vfld(node)) {