added attribute and function to retrieve barrier from start block

diff --git a/ir/be/beabi.c b/ir/be/beabi.c
index 250a373..2e06bc4 100644 (file)
--- a/ir/be/beabi.c
+++ b/ir/be/beabi.c
@@ -69,6 +69,8 @@ struct _be_abi_irg_t {
        ir_node              *init_sp;      /**< The node representing the stack pointer
                                                                             at the start of the function. */
 
+       ir_node              *start_barrier; /**< The barrier of the start block */
+
        ir_node              *reg_params;   /**< The reg params node. */
        pmap                 *regs;         /**< A map of all callee-save and ignore regs to
                                                                                        their Projs to the RegParams node. */
@@ -1674,7 +1676,7 @@ static void modify_irg(be_abi_irg_t *env)
        env->init_sp = be_new_IncSP(sp, irg, bl, env->init_sp, BE_STACK_FRAME_SIZE_EXPAND);
        be_abi_reg_map_set(env->regs, sp, env->init_sp);
 
-       barrier = create_barrier(env, bl, &mem, env->regs, 0);
+       env->start_barrier = barrier = create_barrier(env, bl, &mem, env->regs, 0);
 
        env->init_sp  = be_abi_reg_map_get(env->regs, sp);
        arch_set_irn_register(env->birg->main_env->arch_env, env->init_sp, sp);
@@ -1976,6 +1978,11 @@ ir_node *be_abi_get_ignore_irn(be_abi_irg_t *abi, const arch_register_t *reg)
        return pmap_get(abi->regs, (void *) reg);
 }
 
+ir_node *be_abi_get_start_barrier(be_abi_irg_t *abi)
+{
+       return abi->start_barrier;
+}
+
 /*
   _____ _____  _   _   _    _                 _ _
  |_   _|  __ \| \ | | | |  | |               | | |

diff --git a/ir/be/beabi.h b/ir/be/beabi.h
index 318c4b5..c1868a3 100644 (file)
--- a/ir/be/beabi.h
+++ b/ir/be/beabi.h
@@ -125,6 +125,7 @@ void be_abi_put_ignore_regs(be_abi_irg_t *abi, const arch_register_class_t *cls,
 
 ir_node *be_abi_get_callee_save_irn(be_abi_irg_t *abi, const arch_register_t *reg);
 ir_node *be_abi_get_ignore_irn(be_abi_irg_t *abi, const arch_register_t *reg);
+ir_node *be_abi_get_start_barrier(be_abi_irg_t *abi);
 
 #define be_abi_reg_map_get(map, reg)      pmap_get((map), (void *) (reg))
 #define be_abi_reg_map_set(map, reg, irn)  pmap_insert((map), (void *) (reg), (irn))