ir_node *init_sp; /**< The node representing the stack pointer
at the start of the function. */
+ ir_node *reg_params;
+
pset *stack_ops; /**< Contains all nodes modifying the stack pointer. */
- pset *ignore_regs; /**< Contains all registers which shall be ignored
- during register allocation. */
+ pmap *regs;
int start_block_bias;
const arch_register_t *sp = arch_isa_sp(isa);
ir_mode *mach_mode = sp->reg_class->mode;
struct obstack *obst = &env->obst;
+ ir_node *no_mem = get_irg_no_mem(irg);
ir_node *res_proj = NULL;
int curr_res_proj = -1;
/* Let the isa fill out the abi description for that call node. */
arch_isa_get_call_abi(isa, mt, call);
+ assert(get_method_variadicity(mt) == variadicity_non_variadic);
+
/* Insert code to put the stack arguments on the stack. */
- for(i = get_irn_arity(irn); i >= 0; --i) {
- if(is_on_stack(call, i)) {
+ /* TODO: Vargargs */
+ for(i = 0, n = get_Call_n_params(irn); i < n; ++i) {
+ be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
+ if(arg && !arg->in_reg) {
stack_size += get_type_size_bytes(get_method_param_type(mt, i));
obstack_int_grow(obst, i);
n_pos++;
pos = obstack_finish(obst);
/* Collect all arguments which are passed in registers. */
- for(i = 0, n = get_irn_arity(irn); i < n; ++i) {
+ for(i = 0, n = get_Call_n_params(irn); i < n; ++i) {
be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
if(arg && arg->in_reg) {
obstack_int_grow(obst, i);
* moving the stack pointer along the stack's direction.
*/
if(stack_dir < 0 && !do_seq) {
- curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, stack_size, be_stack_dir_along);
+ curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, no_mem, stack_size, be_stack_dir_along);
pset_insert_ptr(env->stack_ops, curr_sp);
}
+ assert(mode_is_reference(mach_mode) && "machine mode must be pointer");
for(i = 0; i < n_pos; ++i) {
int p = pos[i];
- ir_node *param = get_irn_n(irn, p);
+ ir_node *param = get_Call_param(irn, p);
ir_node *addr = curr_sp;
ir_node *mem = NULL;
type *param_type = get_method_param_type(mt, p);
/* Make the expression to compute the argument's offset. */
if(curr_ofs > 0) {
- addr = new_r_Const_long(irg, bl, mach_mode, curr_ofs);
+ addr = new_r_Const_long(irg, bl, mode_Is, curr_ofs);
addr = new_r_Add(irg, bl, curr_sp, addr, mach_mode);
}
/* Insert a store for primitive arguments. */
- if(is_Primitive_type(param_type)) {
+ if(is_atomic_type(param_type)) {
mem = new_r_Store(irg, bl, curr_mem, addr, param);
mem = new_r_Proj(irg, bl, mem, mode_M, pn_Store_M);
}
*/
if(do_seq) {
curr_ofs = 0;
- curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, param_size, be_stack_dir_along);
+ curr_sp = be_new_IncSP(sp, irg, bl, curr_sp, no_mem, param_size, be_stack_dir_along);
curr_mem = mem;
/*
}
/* Collect caller save registers */
- for(i = 0; env->birg->main_env->caller_save[i]; ++i)
- pset_insert_ptr(caller_save, env->birg->main_env->caller_save[i]);
+ for(i = 0, n = arch_isa_get_n_reg_class(isa); i < n; ++i) {
+ int j;
+ const arch_register_class_t *cls = arch_isa_get_reg_class(isa, i);
+ for(j = 0; j < cls->n_regs; ++j) {
+ const arch_register_t *reg = arch_register_for_index(cls, j);
+ if(arch_register_type_is(reg, caller_save))
+ pset_insert_ptr(caller_save, (void *) reg);
+ }
+ }
/* search the greatest result proj number */
foreach_out_edge(irn, edge) {
/* Make a Proj for the stack pointer. */
sp_proj = new_r_Proj(irg, bl, res_proj, sp->reg_class->mode, curr_res_proj++);
- last_inc_sp = be_new_IncSP(sp, irg, bl, sp_proj, stack_size, be_stack_dir_against);
+ last_inc_sp = be_new_IncSP(sp, irg, bl, sp_proj, no_mem, stack_size, be_stack_dir_against);
pset_insert_ptr(env->stack_ops, last_inc_sp);
}
/* at last make the backend call node and set its register requirements. */
for(i = 0; i < n_low_args; ++i)
- obstack_ptr_grow(obst, get_irn_n(irn, low_args[i]));
+ obstack_ptr_grow(obst, get_Call_param(irn, low_args[i]));
+
in = obstack_finish(obst);
low_call = be_new_Call(irg, bl, curr_mem, curr_sp, get_Call_ptr(irn), curr_res_proj, n_low_args, in);
obstack_free(obst, in);
}
}
+static ir_node *setup_frame(be_abi_irg_t *env)
+{
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+ const arch_register_t *sp = isa->sp;
+ const arch_register_t *bp = isa->bp;
+ ir_graph *irg = env->birg->irg;
+ ir_node *bl = get_irg_start_block(irg);
+ ir_node *no_mem = get_irg_no_mem(irg);
+ ir_node *old_frame = get_irg_frame(irg);
+ int store_old_fp = 1;
+ int omit_fp = env->omit_fp;
+ ir_node *stack = pmap_get(env->regs, (void *) sp);
+ ir_node *frame = pmap_get(env->regs, (void *) bp);
+
+ int stack_nr = get_Proj_proj(stack);
+
+ if(omit_fp) {
+ stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_along);
+ frame = stack;
+ }
+
+ else {
+ if(store_old_fp) {
+ ir_node *irn;
+
+ irn = new_r_Store(irg, bl, get_irg_initial_mem(irg), stack, frame);
+ irn = new_r_Proj(irg, bl, irn, mode_M, pn_Store_M);
+ stack = be_new_IncSP(sp, irg, bl, stack, irn, get_mode_size_bytes(bp->reg_class->mode), be_stack_dir_along);
+ }
+
+ frame = be_new_Copy(bp->reg_class, irg, bl, stack);
+
+ be_node_set_flags(frame, -1, arch_irn_flags_dont_spill);
+ if(env->dedicated_fp) {
+ be_set_constr_single_reg(frame, -1, bp);
+ be_node_set_flags(frame, -1, arch_irn_flags_ignore);
+ }
+
+ stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_along);
+ }
+
+ be_node_set_flags(env->reg_params, -(stack_nr + 1), arch_irn_flags_ignore);
+ env->init_sp = stack;
+ set_irg_frame(irg, frame);
+ edges_reroute(old_frame, frame, irg);
+
+ return frame;
+}
+
+static void clearup_frame(be_abi_irg_t *env, ir_node *bl, struct obstack *obst)
+{
+ const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+ const arch_register_t *sp = isa->sp;
+ const arch_register_t *bp = isa->bp;
+ ir_graph *irg = env->birg->irg;
+ ir_node *no_mem = get_irg_no_mem(irg);
+ ir_node *frame = get_irg_frame(irg);
+ ir_node *stack = env->init_sp;
+ int store_old_fp = 1;
+
+ pmap_entry *ent;
+
+
+ if(env->omit_fp) {
+ stack = be_new_IncSP(sp, irg, bl, stack, no_mem, BE_STACK_FRAME_SIZE, be_stack_dir_against);
+ }
+
+ else {
+ stack = be_new_Copy(sp->reg_class, irg, bl, frame);
+
+ if(store_old_fp) {
+ ir_mode *mode = sp->reg_class->mode;
+ ir_node *irn;
+
+ stack = be_new_IncSP(sp, irg, bl, stack, no_mem, get_mode_size_bytes(mode), be_stack_dir_against);
+ irn = new_r_Load(irg, bl, no_mem, stack, mode);
+ irn = new_r_Proj(irg, bl, irn, mode, pn_Load_res);
+ frame = be_new_Copy(bp->reg_class, irg, bl, irn);
+ }
+
+ if(env->dedicated_fp) {
+ be_set_constr_single_reg(frame, -1, bp);
+ }
+
+ }
+
+ pmap_foreach(env->regs, ent) {
+ const arch_register_t *reg = ent->key;
+ ir_node *irn = ent->value;
+
+ if(reg == sp)
+ irn = stack;
+ else if(reg == bp)
+ irn = frame;
+
+ obstack_ptr_grow(obst, irn);
+ }
+}
+
/**
* Modify the irg itself and the frame type.
*/
static void modify_irg(be_abi_irg_t *env)
{
+ firm_dbg_module_t *dbg = env->dbg;
be_abi_call_t *call = be_abi_call_new();
const arch_isa_t *isa = env->birg->main_env->arch_env->isa;
+ const arch_register_t *sp = arch_isa_sp(isa);
ir_graph *irg = env->birg->irg;
ir_node *bl = get_irg_start_block(irg);
ir_node *end = get_irg_end_block(irg);
ir_node *arg_tuple = get_irg_args(irg);
+ ir_node *no_mem = get_irg_no_mem(irg);
type *method_type = get_entity_type(get_irg_entity(irg));
int n_params = get_method_n_params(method_type);
- const arch_register_t *sp = arch_isa_sp(isa);
- int max_arg = 0;
- int reg_params_nr = 0;
- ir_node *proj_sp = NULL;
- int arg_offset = 0;
+ int max_arg = 0;
+ int reg_params_nr = 0;
+ int arg_offset = 0;
int i, j, n;
ir_node **args, **args_repl;
const ir_edge_t *edge;
- pmap *regs = pmap_create();
pmap_entry *ent;
- firm_dbg_module_t *dbg = env->dbg;
+ env->regs = pmap_create();
DBG((dbg, LEVEL_1, "introducing abi on %+F\n", irg));
be_abi_call_arg_t *arg = get_call_arg(call, 0, i);
if(arg->in_reg) {
assert(arg->reg != sp && "cannot use stack pointer as parameter register");
- pmap_insert(regs, (void *) arg->reg, NULL);
+ pmap_insert(env->regs, (void *) arg->reg, NULL);
DBG((dbg, LEVEL_2, "\targ #%d -> reg %s\n", i, arg->reg->name));
}
}
for(j = 0; j < cls->n_regs; ++j) {
const arch_register_t *reg = &cls->regs[j];
if(arch_register_type_is(reg, callee_save))
- pmap_insert(regs, (void *) reg, NULL);
+ pmap_insert(env->regs, (void *) reg, NULL);
}
}
- /* The stack pointer must also be saved but not necessarily be marked as callee save */
- pmap_insert(regs, (void *) sp, NULL);
-
+ pmap_insert(env->regs, (void *) sp, NULL);
+ pmap_insert(env->regs, (void *) isa->bp, NULL);
reg_params_bl = get_irg_start_block(irg);
- reg_params = be_new_RegParams(irg, reg_params_bl, pmap_count(regs));
+ env->reg_params = reg_params = be_new_RegParams(irg, reg_params_bl, pmap_count(env->regs));
reg_params_nr = 0;
/*
* make proj nodes for the callee save registers.
* memorize them, since Return nodes get those as inputs.
*/
- for(ent = pmap_first(regs); ent; ent = pmap_next(regs)) {
+ for(ent = pmap_first(env->regs); ent; ent = pmap_next(env->regs)) {
arch_register_t *reg = ent->key;
+ int pos = -(reg_params_nr + 1);
ent->value = new_r_Proj(irg, reg_params_bl, reg_params, reg->reg_class->mode, reg_params_nr);
- be_set_constr_single_reg(reg_params, -(reg_params_nr + 1), reg);
+ be_set_constr_single_reg(reg_params, pos, reg);
+
+ /*
+ * If the register is an ignore register,
+ * The Proj for that register shall also be ignored during register allocation.
+ */
+ if(arch_register_type_is(reg, ignore))
+ be_node_set_flags(reg_params, pos, arch_irn_flags_ignore);
+
reg_params_nr++;
DBG((dbg, LEVEL_2, "\tregister save proj #%d -> reg %s\n", reg_params_nr - 1, reg->name));
}
+ /* Insert the code to set up the stack frame */
+ frame_pointer = setup_frame(env);
+
+#if 0
proj_sp = pmap_get(regs, (void *) sp);
+ proj_bp = pmap_get(regs, (void *) bp);
assert(proj_sp != NULL && "There must be a Proj for the stack pointer");
+ assert(proj_sp != NULL && "There must be a Proj for the base pointer");
+
+ /* Set the Proj for the stack pointer to ignore. */
+ be_node_set_flags(reg_params, -(get_Proj_proj(proj_sp) + 1), arch_irn_flags_ignore);
+
+ /*
+ * If a frame pointer is needed and the frame pointer is in a dedicated register,
+ * also exclude that from register allocation by setting the corresponding
+ * Proj to ignore.
+ */
+ if(!env->omit_fp && env->dedicated_fp)
+ be_node_set_flags(reg_params, -(get_Proj_proj(proj_bp) + 1), arch_irn_flags_ignore);
+
if(env->omit_fp) {
/* This is the stack pointer add/sub which allocates the frame. remind it for later fix up. */
- env->init_sp = be_new_IncSP(sp, irg, reg_params_bl, proj_sp, 0, be_stack_dir_along);
+ env->init_sp = be_new_IncSP(sp, irg, reg_params_bl, proj_sp, no_mem, 0, be_stack_dir_along);
frame_pointer = env->init_sp;
}
/* Set the new frame pointer. */
exchange(get_irg_frame(irg), frame_pointer);
set_irg_frame(irg, frame_pointer);
+#endif
/* compute the start offset for the stack parameters. */
{
if(inc_dir < 0)
arg_offset -= size;
- if(is_atomic_type(param_type)) {
+ /* For atomic parameters which are actually used, we create a StackParam node. */
+ if(is_atomic_type(param_type) && get_irn_n_edges(args[i]) > 0) {
ir_mode *mode = get_type_mode(param_type);
const arch_register_class_t *cls = arch_isa_get_reg_class_for_mode(isa, mode);
args_repl[i] = be_new_StackParam(cls, irg, reg_params_bl, mode, frame_pointer, arg_offset);
ir_node *irn = get_irn_n(end, i);
if(get_irn_opcode(irn) == iro_Return) {
- ir_node *bl = get_nodes_block(irn);
+ ir_node *bl = get_nodes_block(irn);
+ int n_res = get_Return_n_ress(irn);
+ pmap *reg_map = pmap_create_ex(n_res);
ir_node *ret;
int i, n;
ir_node **in;
/* collect all arguments of the return */
- for(i = 0, n = get_irn_arity(irn); i < n; ++i)
- obstack_ptr_grow(&env->obst, get_irn_n(irn, i));
-
- /* Add the Proj nodes representing the caller save registers. */
- for(ent = pmap_first(regs); ent; ent = pmap_next(regs), ++n) {
- const arch_register_t *reg = ent->key;
- ir_node *irn = ent->value;
-
- /*
- * If the register is the stack pointer,
- * add the fix up code. Either add the size of the stack
- * frame if we omitted the frame pointer or move the
- * frame pointer back to the stack register.
- */
- if(reg == sp) {
- if(!env->omit_fp) {
- irn = be_new_Copy(sp->reg_class, irg, bl, frame_pointer);
- be_set_constr_single_reg(irn, -1, sp);
- }
+ 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);
- else
- irn = be_new_IncSP(sp, irg, bl, proj_sp, 0, be_stack_dir_against);
- }
- obstack_ptr_grow(&env->obst, irn);
+ assert(arg->in_reg && "return value must be passed in register");
+ pmap_insert(reg_map, res, (void *) arg->reg);
+ obstack_ptr_grow(&env->obst, res);
}
+ /* generate the clean up code and add additional parameters to the return. */
+ clearup_frame(env, bl, &env->obst);
+
/* The in array for the new back end return is now ready. */
+ n = obstack_object_size(&env->obst) / sizeof(in[0]);
in = obstack_finish(&env->obst);
ret = be_new_Return(irg, bl, n, in);
- edges_reroute(irn, ret, irg);
+
+ /* Set the constraints for some arguments of the return. */
+ for(i = 0; i < n; i++) {
+ const arch_register_t *reg = pmap_get(reg_map, in[i]);
+ if(reg != NULL)
+ be_set_constr_single_reg(ret, i, reg);
+ }
+ exchange(irn, ret);
obstack_free(&env->obst, in);
+ pmap_destroy(reg_map);
}
}
obstack_free(&env->obst, args);
be_abi_call_free(call);
- pmap_destroy(regs);
}
static void collect_alloca_walker(ir_node *irn, void *data)
for(i = 0; stack_allocs[i] != NULL; ++i)
implement_stack_alloc(env, stack_allocs[i]);
- irg_walk_graph(env->birg->irg, NULL, adjust_call_walker, &env);
+ irg_walk_graph(env->birg->irg, NULL, adjust_call_walker, env);
return env;
}
obstack_free(&env->obst, NULL);
free(env);
}
+
+ir_node *be_abi_get_callee_save_irn(be_abi_irg_t *abi, const arch_register_t *reg)
+{
+ assert(arch_register_type_is(reg, callee_save));
+ assert(pmap_contains(abi->regs, (void *) reg));
+ return pmap_get(abi->regs, (void *) reg);
+}
projects / libfirm / blobdiff