Remove dead code, remove pointless marking of memory nodes, explain a bit what happens.

[r16323]

diff --git a/ir/be/ia32/ia32_address_mode.c b/ir/be/ia32/ia32_address_mode.c
index 4ab4eae..79b6546 100644 (file)
--- a/ir/be/ia32/ia32_address_mode.c
+++ b/ir/be/ia32/ia32_address_mode.c
@@ -425,8 +425,6 @@ void ia32_mark_non_am(ir_node *node)
 static void mark_non_address_nodes(ir_node *node, void *env)
 {
        int i, arity;
-       ir_node *ptr;
-       ir_node *mem;
        ir_node *val;
        ir_node *block;
        ir_node *left;
@@ -441,19 +439,14 @@ static void mark_non_address_nodes(ir_node *node, void *env)
 
        switch(get_irn_opcode(node)) {
        case iro_Load:
-               ptr = get_Load_ptr(node);
-               mem = get_Load_mem(node);
-
-               bitset_set(non_address_mode_nodes, get_irn_idx(mem));
+               /* Nothing to do. especially do not mark the pointer, because we want to
+                * turn it into AM. */
                break;
 
        case iro_Store:
+               /* Do not mark the pointer, because we want to turn it into AM. */
                val = get_Store_value(node);
-               ptr = get_Store_ptr(node);
-               mem = get_Store_mem(node);
-
                bitset_set(non_address_mode_nodes, get_irn_idx(val));
-               bitset_set(non_address_mode_nodes, get_irn_idx(mem));
                break;
 
        case iro_Shl: