void *cb; /**< ABI Callback self pointer. */
+ pmap *keep_map; /**< mapping blocks to keep nodes. */
+ pset *ignore_regs; /**< Additional registers which shall be ignored. */
+
arch_irn_handler_t irn_handler;
arch_irn_ops_t irn_ops;
DEBUG_ONLY(firm_dbg_module_t *dbg;) /**< The debugging module. */
static const arch_irn_ops_if_t abi_irn_ops;
static const arch_irn_handler_t abi_irn_handler;
+/* Flag: if set, try to omit the frame pointer if called by the backend */
+int be_omit_fp = 1;
+
/*
_ ____ ___ ____ _ _ _ _
/ \ | __ )_ _| / ___|__ _| | | |__ __ _ ___| | _____
*
* @return the new ABI call object
*/
-static be_abi_call_t *be_abi_call_new(void)
+static be_abi_call_t *be_abi_call_new()
{
be_abi_call_t *call = xmalloc(sizeof(call[0]));
call->flags.val = 0;
call->params = new_set(cmp_call_arg, 16);
call->cb = NULL;
+
+ call->flags.bits.try_omit_fp = be_omit_fp;
return call;
}
int curr_ofs = 0;
int do_seq = call->flags.bits.store_args_sequential && !no_alloc;
- /* Reverse list of stack parameters if call arguments are from left to right */
- if(call->flags.bits.left_to_right) {
- for(i = 0; i < n_pos / 2; ++i) {
+ /*
+ * Reverse list of stack parameters if call arguments are from left to right.
+ * We must them reverse again in they are pushed (not stored) and the stack
+ * direction is downwards.
+ */
+ if (call->flags.bits.left_to_right ^ (do_seq && stack_dir < 0)) {
+ for(i = 0; i < n_pos >> 1; ++i) {
int other = n_pos - i - 1;
int tmp = pos[i];
pos[i] = pos[other];
*/
if(do_seq) {
curr_ofs = 0;
- curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, no_mem, param_size, be_stack_dir_expand);
+ curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, curr_mem, param_size, be_stack_dir_expand);
curr_mem = mem;
}
}
be_Call_set_entity(low_call, get_SymConst_entity(call_ptr));
}
- else
+ else
low_call = be_new_Call(get_irn_dbg_info(irn), irg, bl, curr_mem, curr_sp, call_ptr,
curr_res_proj + pset_count(caller_save), n_low_args, in,
get_Call_type(irn));
const ir_edge_t *edge;
ir_node *new_alloc;
- env->call->flags.bits.try_omit_fp = 0;
-
- new_alloc = be_new_AddSP(env->isa->sp, irg, bl, curr_sp, get_Alloc_size(alloc));
-
foreach_out_edge(alloc, edge) {
ir_node *irn = get_edge_src_irn(edge);
}
}
- /* TODO: Beware: currently Alloc nodes without a result might happen,
- only escape analysis kills them and this phase runs only for object
- oriented source. So this must be fixed. */
- assert(alloc_res != NULL);
+ /* 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) {
+ exchange(alloc_mem, get_Alloc_mem(alloc));
+ return curr_sp;
+ }
+
+ /* The stack pointer will be modified in an unknown manner.
+ We cannot omit it. */
+ 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);
if(alloc_mem != NULL)
/* If there were call nodes in the block. */
if(n > 0) {
+ ir_node *keep;
ir_node **nodes;
int i;
/* Keep the last stack state in the block by tying it to Keep node */
nodes[0] = curr_sp;
- be_new_Keep(env->isa->sp->reg_class, get_irn_irg(bl), bl, 1, nodes);
+ keep = be_new_Keep(env->isa->sp->reg_class, get_irn_irg(bl), bl, 1, nodes);
+ pmap_insert(env->keep_map, bl, keep);
}
set_irn_link(bl, curr_sp);
}
}
+#if 0 /*
static ir_node *setup_frame(be_abi_irg_t *env)
{
const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
obstack_ptr_grow(obst, irn);
}
}
+*/
+#endif
static ir_type *compute_arg_type(be_abi_irg_t *env, be_abi_call_t *call, ir_type *method_type)
{
return res;
}
-static void create_barrier(be_abi_irg_t *env, ir_node *bl, ir_node **mem, pmap *regs, int in_req)
+/**
+ * Creates a barrier.
+ */
+static ir_node *create_barrier(be_abi_irg_t *env, ir_node *bl, ir_node **mem, pmap *regs, int in_req)
{
ir_graph *irg = env->birg->irg;
int n;
be_set_constr_single_reg(irn, pos, reg);
be_node_set_reg_class(irn, pos, reg->reg_class);
arch_set_irn_register(env->birg->main_env->arch_env, proj, reg);
- if(arch_register_type_is(reg, ignore))
+
+ /* if the proj projects a ignore register or a node which is set to ignore, propagate this property. */
+ if(arch_register_type_is(reg, ignore) || arch_irn_is(env->birg->main_env->arch_env, in[n], ignore))
be_node_set_flags(irn, pos, arch_irn_flags_ignore);
pmap_insert(regs, (void *) reg, proj);
}
obstack_free(&env->obst, rm);
+ return irn;
+}
+
+static ir_node *create_be_return(be_abi_irg_t *env, ir_node *irn, ir_node *bl, ir_node *mem, int n_res) {
+ be_abi_call_t *call = env->call;
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+
+ pmap *reg_map = pmap_create();
+ ir_node *keep = pmap_get(env->keep_map, bl);
+ int in_max;
+ ir_node *ret;
+ int i, n;
+ ir_node **in;
+ ir_node *stack;
+ const arch_register_t **regs;
+ pmap_entry *ent ;
+
+ /*
+ get the valid stack node in this block.
+ If we had a call in that block there is a Keep constructed by process_calls()
+ which points to the last stack modification in that block. we'll use
+ it then. Else we use the stack from the start block and let
+ the ssa construction fix the usage.
+ */
+ stack = keep ? get_irn_n(keep, 0) : be_abi_reg_map_get(env->regs, isa->sp);
+ be_abi_reg_map_set(reg_map, isa->sp, stack);
+
+ /* Insert results for Return into the register map. */
+ for(i = 0; i < n_res; ++i) {
+ ir_node *res = get_Return_res(irn, i);
+ be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
+ assert(arg->in_reg && "return value must be passed in register");
+ pmap_insert(reg_map, (void *) arg->reg, res);
+ }
+
+ /* Add uses of the callee save registers. */
+ pmap_foreach(env->regs, ent) {
+ const arch_register_t *reg = ent->key;
+ if(arch_register_type_is(reg, callee_save) || arch_register_type_is(reg, ignore))
+ pmap_insert(reg_map, ent->key, ent->value);
+ }
+
+ /* Make the Epilogue node and call the arch's epilogue maker. */
+ create_barrier(env, bl, &mem, reg_map, 1);
+ call->cb->epilogue(env->cb, bl, &mem, reg_map);
+
+ /*
+ Maximum size of the in array for Return nodes is
+ return args + callee save/ignore registers + memory + stack pointer
+ */
+ in_max = pmap_count(reg_map) + n_res + 2;
+
+ in = obstack_alloc(&env->obst, in_max * sizeof(in[0]));
+ regs = obstack_alloc(&env->obst, in_max * sizeof(regs[0]));
+
+ in[0] = mem;
+ in[1] = be_abi_reg_map_get(reg_map, isa->sp);
+ regs[0] = NULL;
+ regs[1] = isa->sp;
+ n = 2;
+
+ /* clear SP entry, since it has already been grown. */
+ pmap_insert(reg_map, (void *) isa->sp, NULL);
+ for(i = 0; i < n_res; ++i) {
+ ir_node *res = get_Return_res(irn, i);
+ be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
+
+ in[n] = be_abi_reg_map_get(reg_map, arg->reg);
+ regs[n++] = arg->reg;
+
+ /* Clear the map entry to mark the register as processed. */
+ be_abi_reg_map_set(reg_map, arg->reg, NULL);
+ }
+
+ /* grow the rest of the stuff. */
+ pmap_foreach(reg_map, ent) {
+ if(ent->value) {
+ in[n] = ent->value;
+ regs[n++] = ent->key;
+ }
+ }
+
+ /* The in array for the new back end return is now ready. */
+ ret = be_new_Return(irn ? get_irn_dbg_info(irn) : NULL, env->birg->irg, bl, n, in);
+
+ /* Set the register classes of the return's parameter accordingly. */
+ for(i = 0; i < n; ++i)
+ if(regs[i])
+ be_node_set_reg_class(ret, i, regs[i]->reg_class);
+
+ /* Free the space of the Epilog's in array and the register <-> proj map. */
+ obstack_free(&env->obst, in);
+ pmap_destroy(reg_map);
+
+ return ret;
}
/**
pset *dont_save = pset_new_ptr(8);
int n_params = get_method_n_params(method_type);
int max_arg = 0;
- DEBUG_ONLY(firm_dbg_module_t *dbg = env->dbg;)
int i, j, n;
reg_node_map_t *rm;
const arch_register_t *fp_reg;
ir_node *frame_pointer;
+ ir_node *barrier;
ir_node *reg_params_bl;
ir_node **args;
const ir_edge_t *edge;
ir_type *arg_type, *bet_type;
- pmap_entry *ent;
bitset_t *used_proj_nr;
+ DEBUG_ONLY(firm_dbg_module_t *dbg = env->dbg;)
DBG((dbg, LEVEL_1, "introducing abi on %+F\n", irg));
obstack_free(&env->obst, rm);
/* Generate the Prologue */
- fp_reg = call->cb->prologue(env->cb, &mem, env->regs);
- create_barrier(env, bl, &mem, env->regs, 0);
+ fp_reg = call->cb->prologue(env->cb, &mem, env->regs);
+ /* do the stack allocation BEFORE the barrier, or spill code
+ might be added before it */
env->init_sp = be_abi_reg_map_get(env->regs, sp);
- env->init_sp = be_new_IncSP(sp, irg, bl, env->init_sp, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_expand);
- arch_set_irn_register(env->birg->main_env->arch_env, env->init_sp, sp);
+ env->init_sp = be_new_IncSP(sp, irg, bl, env->init_sp, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_expand);
be_abi_reg_map_set(env->regs, sp, env->init_sp);
+
+ 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);
+
frame_pointer = be_abi_reg_map_get(env->regs, fp_reg);
set_irg_frame(irg, frame_pointer);
+ pset_insert_ptr(env->ignore_regs, fp_reg);
/* Now, introduce stack param nodes for all parameters passed on the stack */
for(i = 0; i < max_arg; ++i) {
}
/* All Return nodes hang on the End node, so look for them there. */
- for(i = 0, n = get_irn_arity(end); i < n; ++i) {
- ir_node *irn = get_irn_n(end, i);
-
- if(get_irn_opcode(irn) == iro_Return) {
- ir_node *bl = get_nodes_block(irn);
- int n_res = get_Return_n_ress(irn);
- pmap *reg_map = pmap_create();
- ir_node *mem = get_Return_mem(irn);
- int in_max;
- ir_node *ret;
- int i, n;
- ir_node **in;
- const arch_register_t **regs;
-
- pmap_insert(reg_map, (void *) sp, pmap_get(env->regs, (void *) sp));
-
- /* Insert results for Return into the register map. */
- for(i = 0; i < n_res; ++i) {
- ir_node *res = get_Return_res(irn, i);
- be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
- assert(arg->in_reg && "return value must be passed in register");
- pmap_insert(reg_map, (void *) arg->reg, res);
- }
+ for (i = 0, n = get_Block_n_cfgpreds(end); i < n; ++i) {
+ ir_node *irn = get_Block_cfgpred(end, i);
- /* Add uses of the callee save registers. */
- pmap_foreach(env->regs, ent) {
- const arch_register_t *reg = ent->key;
- if(arch_register_type_is(reg, callee_save) || arch_register_type_is(reg, ignore))
- pmap_insert(reg_map, ent->key, ent->value);
- }
-
- /* Make the Epilogue node and call the arch's epilogue maker. */
- create_barrier(env, bl, &mem, reg_map, 1);
- call->cb->epilogue(env->cb, bl, &mem, reg_map);
-
- /*
- Maximum size of the in array for Return nodes is
- return args + callee save/ignore registers + memory + stack pointer
- */
- in_max = pmap_count(reg_map) + get_Return_n_ress(irn) + 2;
-
- in = obstack_alloc(&env->obst, in_max * sizeof(in[0]));
- regs = obstack_alloc(&env->obst, in_max * sizeof(regs[0]));
-
- in[0] = mem;
- in[1] = be_abi_reg_map_get(reg_map, sp);
- regs[0] = NULL;
- regs[1] = sp;
- n = 2;
-
- /* clear SP entry, since it has already been grown. */
- pmap_insert(reg_map, (void *) sp, NULL);
- for(i = 0; i < n_res; ++i) {
- ir_node *res = get_Return_res(irn, i);
- be_abi_call_arg_t *arg = get_call_arg(call, 1, i);
-
- in[n] = be_abi_reg_map_get(reg_map, arg->reg);
- regs[n++] = arg->reg;
-
- /* Clear the map entry to mark the register as processed. */
- be_abi_reg_map_set(reg_map, arg->reg, NULL);
- }
-
- /* grow the rest of the stuff. */
- pmap_foreach(reg_map, ent) {
- if(ent->value) {
- in[n] = ent->value;
- regs[n++] = ent->key;
- }
- }
-
- /* The in array for the new back end return is now ready. */
- ret = be_new_Return(get_irn_dbg_info(irn), irg, bl, n, in);
-
- /* Set the register classes of the return's parameter accordingly. */
- for(i = 0; i < n; ++i)
- if(regs[i])
- be_node_set_reg_class(ret, i, regs[i]->reg_class);
-
- /* Free the space of the Epilog's in array and the register <-> proj map. */
- obstack_free(&env->obst, in);
- exchange(irn, ret);
- pmap_destroy(reg_map);
+ if (get_irn_opcode(irn) == iro_Return) {
+ ir_node *ret = create_be_return(env, irn, get_nodes_block(irn), get_Return_mem(irn), get_Return_n_ress(irn));
+ exchange(irn, ret);
}
}
+ if (n <= 0) {
+ /* we have endless loops, add a dummy return without return vals */
+ ir_node *ret = create_be_return(env, NULL, end, get_irg_no_mem(irg), n);
+ add_End_keepalive(get_irg_end(irg), ret);
+ }
+
del_pset(dont_save);
obstack_free(&env->obst, args);
}
pmap_entry *ent;
ir_node *dummy;
+ obstack_init(&env->obst);
+
env->isa = birg->main_env->arch_env->isa;
env->method_type = get_entity_type(get_irg_entity(irg));
env->call = be_abi_call_new();
arch_isa_get_call_abi(env->isa, env->method_type, env->call);
+ env->ignore_regs = pset_new_ptr_default();
+ env->keep_map = pmap_create();
env->dce_survivor = new_survive_dce();
env->birg = birg;
env->stack_phis = pset_new_ptr(16);
env->cb = env->call->cb->init(env->call, birg->main_env->arch_env, irg);
- obstack_init(&env->obst);
-
memcpy(&env->irn_handler, &abi_irn_handler, sizeof(abi_irn_handler));
env->irn_ops.impl = &abi_irn_ops;
/* Process the IRG */
modify_irg(env);
+ /* We don't need the keep map anymore. */
+ pmap_destroy(env->keep_map);
+
/* reroute the stack origin of the calls to the true stack origin. */
edges_reroute(dummy, env->init_sp, irg);
edges_reroute(old_frame, get_irg_frame(irg), irg);
{
free_survive_dce(env->dce_survivor);
del_pset(env->stack_phis);
+ del_pset(env->ignore_regs);
pmap_destroy(env->regs);
obstack_free(&env->obst, NULL);
arch_env_pop_irn_handler(env->birg->main_env->arch_env);
free(env);
}
+void be_abi_put_ignore_regs(be_abi_irg_t *abi, const arch_register_class_t *cls, bitset_t *bs)
+{
+ arch_register_t *reg;
+
+ for(reg = pset_first(abi->ignore_regs); reg; reg = pset_next(abi->ignore_regs))
+ if(reg->reg_class == cls)
+ bitset_set(bs, reg->index);
+}
+
/*
projects / libfirm / blobdiff