- at blockstart emit list of predblocks in comment

[libfirm] / ir / be / beabi.c

diff --git a/ir/be/beabi.c b/ir/be/beabi.c
index 26e0d73..ef81cd9 100644 (file)
--- a/ir/be/beabi.c
+++ b/ir/be/beabi.c
@@ -218,7 +218,7 @@ be_abi_call_flags_t be_abi_call_get_flags(const be_abi_call_t *call)
  *
  * @return the new ABI call object
  */
-static be_abi_call_t *be_abi_call_new()
+static be_abi_call_t *be_abi_call_new(void)
 {
        be_abi_call_t *call = xmalloc(sizeof(call[0]));
        call->flags.val  = 0;
@@ -716,6 +716,8 @@ static ir_node *adjust_alloc(be_abi_irg_t *env, ir_node *alloc, ir_node *curr_sp
 
                const ir_edge_t *edge;
                ir_node *new_alloc;
+               ir_node *addr;
+               ir_node *copy;
 
                foreach_out_edge(alloc, edge) {
                        ir_node *irn = get_edge_src_irn(edge);
@@ -736,7 +738,7 @@ static ir_node *adjust_alloc(be_abi_irg_t *env, ir_node *alloc, ir_node *curr_sp
                /* Beware: currently Alloc nodes without a result might happen,
                   only escape analysis kills them and this phase runs only for object
                   oriented source. We kill the Alloc here. */
-               if (alloc_res == NULL) {
+               if (alloc_res == NULL && alloc_mem) {
                        exchange(alloc_mem, get_Alloc_mem(alloc));
                        return curr_sp;
                }
@@ -746,12 +748,27 @@ static ir_node *adjust_alloc(be_abi_irg_t *env, ir_node *alloc, ir_node *curr_sp
                env->call->flags.bits.try_omit_fp = 0;
                new_alloc = be_new_AddSP(env->isa->sp, irg, bl, curr_sp, get_Alloc_size(alloc));
 
-               exchange(alloc_res, env->isa->stack_dir < 0 ? new_alloc : curr_sp);
+               exchange(alloc, new_alloc);
 
                if(alloc_mem != NULL)
-                       exchange(alloc_mem, new_r_NoMem(irg));
+                       set_Proj_proj(alloc_mem, pn_be_AddSP_M);
 
-               curr_sp = new_alloc;
+               /* fix projnum of alloca res */
+               set_Proj_proj(alloc_res, pn_be_AddSP_res);
+
+               addr = env->isa->stack_dir < 0 ? alloc_res : curr_sp;
+
+               /* copy the address away, since it could be used after further stack pointer modifictions. */
+               /* Let it point curr_sp just for the moment, I'll reroute it in a second. */
+               copy = be_new_Copy(env->isa->sp->reg_class, irg, bl, curr_sp);
+
+               /* Let all users of the Alloc() result now point to the copy. */
+               edges_reroute(alloc_res, copy, irg);
+
+               /* Rewire the copy appropriately. */
+               set_irn_n(copy, be_pos_Copy_op, addr);
+
+               curr_sp = alloc_res;
        }
 
        return curr_sp;
@@ -829,12 +846,13 @@ static int cmp_call_dependecy(const void *c1, const void *c2)
  */
 static void link_calls_in_block_walker(ir_node *irn, void *data)
 {
-       if(is_Call(irn)) {
+       if(is_Call(irn) || (get_irn_opcode(irn) == iro_Alloc && get_Alloc_where(irn) == stack_alloc)) {
                be_abi_irg_t *env = data;
                ir_node *bl       = get_nodes_block(irn);
                void *save        = get_irn_link(bl);
 
-               env->call->flags.bits.irg_is_leaf = 0;
+               if (is_Call(irn))
+                       env->call->flags.bits.irg_is_leaf = 0;
 
                set_irn_link(irn, save);
                set_irn_link(bl, irn);
@@ -1700,14 +1718,18 @@ be_abi_irg_t *be_abi_introduce(be_irg_t *birg)
        restore_optimization_state(&state);
        FIRM_DBG_REGISTER(env->dbg, "firm.be.abi");
 
-       env->cb = env->call->cb->init(env->call, birg->main_env->arch_env, irg);
-
        memcpy(&env->irn_handler, &abi_irn_handler, sizeof(abi_irn_handler));
        env->irn_ops.impl = &abi_irn_ops;
 
        /* Lower all call nodes in the IRG. */
        process_calls(env);
 
+       /*
+               Beware: init backend abi call object after processing calls,
+               otherwise some information might be not yet available.
+       */
+       env->cb = env->call->cb->init(env->call, birg->main_env->arch_env, irg);
+
        /* Process the IRG */
        modify_irg(env);
 
@@ -1771,8 +1793,14 @@ struct fix_stack_walker_info {
 static void collect_stack_nodes_walker(ir_node *irn, void *data)
 {
        struct fix_stack_walker_info *info = data;
+       ir_mode *mode;
+
+       if (is_Block(irn))
+               return;
 
-       if(arch_irn_is(info->aenv, irn, modify_sp))
+       mode = get_irn_mode(irn);
+
+       if (arch_irn_is(info->aenv, irn, modify_sp) && mode != mode_T && mode != mode_M)
                pset_insert_ptr(info->nodes, irn);
 }
 
@@ -1974,6 +2002,10 @@ static entity *abi_get_frame_entity(const void *_self, const ir_node *irn)
        return NULL;
 }
 
+static void abi_set_frame_entity(const void *_self, ir_node *irn, entity *ent)
+{
+}
+
 static void abi_set_stack_bias(const void *_self, ir_node *irn, int bias)
 {
 }
@@ -1985,7 +2017,12 @@ static const arch_irn_ops_if_t abi_irn_ops = {
        abi_classify,
        abi_get_flags,
        abi_get_frame_entity,
-       abi_set_stack_bias
+       abi_set_frame_entity,
+       abi_set_stack_bias,
+       NULL,    /* get_inverse             */
+       NULL,    /* get_op_estimated_cost   */
+       NULL,    /* possible_memory_operand */
+       NULL,    /* perform_memory_operand  */
 };
 
 static const arch_irn_handler_t abi_irn_handler = {