beabi: no special treatment of returns_twice

returns_twice handling was broken in the ia32-backend (the only real
beabi user) for a long time now. Just noone noticed because our
frontends lacked the special treatment to set the flag correctly.
Turned out setjmp/longjmp on ia32 save/restore the registers anyway
so not doing anything is fine here.

diff --git a/ir/be/beabi.c b/ir/be/beabi.c
index a71e41a..f9227f0 100644 (file)
--- a/ir/be/beabi.c
+++ b/ir/be/beabi.c
@@ -387,7 +387,7 @@ static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp)
        const ir_edge_t        *edge;
        int                    *reg_param_idxs;
        int                    *stack_param_idx;
-       int                     i, n, destroy_all_regs;
+       int                     i, n;
        int                     throws_exception;
        size_t                  s;
        size_t                  p;
@@ -524,20 +524,6 @@ static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp)
                }
        }
 
-       /* check for the return_twice property */
-       destroy_all_regs = 0;
-       if (is_SymConst_addr_ent(call_ptr)) {
-               ir_entity *ent = get_SymConst_entity(call_ptr);
-
-               if (get_entity_additional_properties(ent) & mtp_property_returns_twice)
-                       destroy_all_regs = 1;
-       } else {
-               ir_type *call_tp = get_Call_type(irn);
-
-               if (get_method_additional_properties(call_tp) & mtp_property_returns_twice)
-                       destroy_all_regs = 1;
-       }
-
        /* Put caller save into the destroyed set and state registers in the states
         * set */
        for (i = 0, n = arch_env->n_register_classes; i < n; ++i) {
@@ -558,7 +544,7 @@ static ir_node *adjust_call(be_abi_irg_t *env, ir_node *irn, ir_node *curr_sp)
                                 * checking */
                                continue;
                        }
-                       if (destroy_all_regs || arch_register_is_caller_save(arch_env, reg)) {
+                       if (arch_register_is_caller_save(arch_env, reg)) {
                                if (!(reg->type & arch_register_type_ignore)) {
                                        ARR_APP1(const arch_register_t*, destroyed_regs, reg);
                                }