* @file
* @brief Backend ABI implementation.
* @author Sebastian Hack, Michael Beck
- * @version $Id$
*/
#include "config.h"
#include "irgwalk.h"
#include "irprintf_t.h"
#include "irgopt.h"
-#include "irbitset.h"
#include "iropt_t.h"
+#include "irtools.h"
#include "heights.h"
#include "pdeq.h"
-#include "irtools.h"
+#include "util.h"
#include "raw_bitset.h"
#include "error.h"
#include "pset_new.h"
pmap_insert(map, reg, node);
}
+/**
+ * Check if the given register is callee save, ie. will be saved by the callee.
+ */
+static bool arch_register_is_callee_save(
+ const arch_env_t *arch_env,
+ const arch_register_t *reg)
+{
+ if (arch_env->impl->register_saved_by)
+ return arch_env->impl->register_saved_by(reg, /*callee=*/1);
+ return false;
+}
+
+/**
+ * Check if the given register is caller save, ie. must be saved by the caller.
+ */
+static bool arch_register_is_caller_save(
+ const arch_env_t *arch_env,
+ const arch_register_t *reg)
+{
+ if (arch_env->impl->register_saved_by)
+ return arch_env->impl->register_saved_by(reg, /*callee=*/0);
+ return false;
+}
+
+
+
/*
_ ____ ___ ____ _ _ _ _
/ \ | __ )_ _| / ___|__ _| | | |__ __ _ ___| | _____
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;
}
}
- /* 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) {
* 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);
}
/* add state registers ins */
for (s = 0; s < ARR_LEN(states); ++s) {
const arch_register_t *reg = states[s];
- const arch_register_class_t *cls = arch_register_get_class(reg);
- ir_node *regnode = new_r_Unknown(irg, arch_register_class_mode(cls));
+ const arch_register_class_t *cls = reg->reg_class;
+ ir_node *regnode = new_r_Unknown(irg, cls->mode);
in[n_ins++] = regnode;
}
assert(n_ins == (int) (n_reg_params + ARR_LEN(states)));
keep = be_new_Keep(bl, n, in);
for (i = 0; i < n; ++i) {
const arch_register_t *reg = (const arch_register_t*)get_irn_link(in[i]);
- be_node_set_reg_class_in(keep, i, reg->reg_class);
+ be_node_set_reg_class_in(keep, i, arch_register_get_class(reg));
}
}
count = get_Alloc_count(alloc);
/* we might need to multiply the count with the element size */
- if (type != firm_unknown_type && get_type_size_bytes(type) != 1) {
+ if (!is_unknown_type(type) && get_type_size_bytes(type) != 1) {
ir_mode *mode = get_irn_mode(count);
ir_tarval *tv = new_tarval_from_long(get_type_size_bytes(type),
mode);
assert(get_Free_where(free) == stack_alloc);
/* we might need to multiply the size with the element size */
- if (type != firm_unknown_type && get_type_size_bytes(type) != 1) {
+ if (!is_unknown_type(type) && get_type_size_bytes(type) != 1) {
ir_tarval *tv = new_tarval_from_long(get_type_size_bytes(type), mode_Iu);
ir_node *cnst = new_rd_Const(dbg, irg, tv);
- ir_node *mul = new_rd_Mul(dbg, block, get_Free_size(free),
+ ir_node *mul = new_rd_Mul(dbg, block, get_Free_count(free),
cnst, mode_Iu);
size = mul;
} else {
- size = get_Free_size(free);
+ size = get_Free_count(free);
}
stack_alignment = 1 << arch_env->stack_alignment;
ir_type *method_type, ir_entity ***param_map)
{
struct obstack *obst = be_get_be_obst(irg);
- ir_type *frame_type = get_irg_frame_type(irg);
- size_t n_params = get_method_n_params(method_type);
- size_t n_frame_members = get_compound_n_members(frame_type);
+ ir_type *frame_type = get_irg_frame_type(irg);
+ size_t n_params = get_method_n_params(method_type);
+ size_t n_frame_members = get_compound_n_members(frame_type);
+ ir_entity *va_start_entity = NULL;
size_t f;
int ofs = 0;
/* collect existing entities for value_param_types */
for (f = n_frame_members; f > 0; ) {
- ir_entity *entity = get_compound_member(frame_type, --f);
- size_t num;
- be_abi_call_arg_t *arg;
+ ir_entity *entity = get_compound_member(frame_type, --f);
+ size_t num;
set_entity_link(entity, NULL);
if (!is_parameter_entity(entity))
continue;
num = get_entity_parameter_number(entity);
+ if (num == IR_VA_START_PARAMETER_NUMBER) {
+ /* move entity to new arg_type */
+ set_entity_owner(entity, res);
+ va_start_entity = entity;
+ continue;
+ }
assert(num < n_params);
if (map[num] != NULL)
panic("multiple entities for parameter %u in %+F found", f, irg);
- arg = get_call_arg(call, 0, num, 1);
- if (!arg->on_stack) {
- map[num] = NULL;
+ if (num != n_params && !get_call_arg(call, 0, num, 1)->on_stack) {
/* don't move this entity */
continue;
}
ofs += get_type_size_bytes(param_type);
arg->stack_ent = entity;
}
+ if (va_start_entity != NULL) {
+ set_entity_offset(va_start_entity, ofs);
+ }
set_type_size_bytes(res, ofs);
set_type_state(res, layout_fixed);
+
return res;
}
}
typedef struct lower_frame_sels_env_t {
- ir_entity **value_param_list; /**< the list of all value param entities */
ir_node *frame; /**< the current frame */
const arch_register_class_t *sp_class; /**< register class of the stack pointer */
const arch_register_class_t *link_class; /**< register class of the link pointer */
ir_node *bl = get_nodes_block(irn);
ir_node *nw;
- if (is_parameter_entity(ent) && get_entity_link(ent) == NULL) {
- /* replace by its copy from the argument type */
- ARR_APP1(ir_entity*, ctx->value_param_list, ent);
- /* just a mark */
- set_entity_link(ent, ctx->value_param_list);
- }
-
nw = be_new_FrameAddr(ctx->sp_class, bl, ctx->frame, ent);
exchange(irn, nw);
}
}
}
-/**
- * Check if a value parameter is transmitted as a register.
- * This might happen if the address of an parameter is taken which is
- * transmitted in registers.
- *
- * Note that on some architectures this case must be handled specially
- * because the place of the backing store is determined by their ABI.
- *
- * In the default case we move the entity to the frame type and create
- * a backing store into the first block.
- */
-static void fix_address_of_parameter_access(be_abi_irg_t *env, ir_graph *irg,
- ir_entity **value_param_list)
-{
- be_abi_call_t *call = env->call;
- const arch_env_t *arch_env = be_get_irg_arch_env(irg);
- size_t n = ARR_LEN(value_param_list);
- size_t i;
- bool need_fixes = false;
- ir_node *first_store = NULL;
- ir_node *start_bl;
- ir_node *frame;
- ir_node *imem;
- ir_node *mem;
- ir_node *args;
-
- for (i = 0; i < n; ++i) {
- ir_entity *entity = value_param_list[i];
- size_t pos = get_entity_parameter_number(entity);
- be_abi_call_arg_t *arg = get_call_arg(call, 0, pos, 1);
-
- if (arg->in_reg) {
- need_fixes = true;
- DBG((dbg, LEVEL_2, "\targ #%d need backing store\n", pos));
- }
- }
- if (!need_fixes)
- return;
-
- /* ok, change the graph */
- start_bl = get_irg_start_block(irg);
-
- /* now create backing stores */
- frame = get_irg_frame(irg);
- imem = get_irg_initial_mem(irg);
- mem = imem;
- args = get_irg_args(irg);
- for (i = 0; i < n; ++i) {
- ir_entity *entity = value_param_list[i];
- size_t pos = get_entity_parameter_number(entity);
- be_abi_call_arg_t *arg = get_call_arg(call, 0, pos, 1);
- ir_node *addr;
-
- if (!arg->in_reg)
- continue;
-
- /* address for the backing store */
- addr = be_new_FrameAddr(arch_env->sp->reg_class, start_bl, frame, entity);
-
- if (entity->attr.parameter.doubleword_low_mode != NULL) {
- ir_mode *mode = entity->attr.parameter.doubleword_low_mode;
- ir_node *val0 = new_r_Proj(args, mode, pos);
- ir_node *val1 = new_r_Proj(args, mode, pos+1);
- ir_node *store0 = new_r_Store(start_bl, mem, addr, val0, cons_none);
- ir_node *mem0 = new_r_Proj(store0, mode_M, pn_Store_M);
- size_t offset = get_mode_size_bits(mode)/8;
- ir_mode *addr_mode = get_irn_mode(addr);
- ir_node *cnst = new_r_Const_long(irg, addr_mode, offset);
- ir_node *next_addr = new_r_Add(start_bl, addr, cnst, addr_mode);
- ir_node *store1 = new_r_Store(start_bl, mem0, next_addr, val1, cons_none);
- mem = new_r_Proj(store1, mode_M, pn_Store_M);
- if (first_store == NULL)
- first_store = store0;
- } else {
- ir_type *tp = get_entity_type(entity);
- ir_mode *mode = get_type_mode(tp);
-
- /* the backing store itself */
- ir_node *val = new_r_Proj(args, mode, pos);
- ir_node *store = new_r_Store(start_bl, mem, addr, val, cons_none);
- mem = new_r_Proj(store, mode_M, pn_Store_M);
-
- if (first_store == NULL)
- first_store = store;
- }
- }
-
- assert(mem != imem);
- edges_reroute(imem, mem);
- set_Store_mem(first_store, imem);
-}
-
/**
* The start block has no jump, instead it has an initial exec Proj.
* The backend wants to handle all blocks the same way, so we replace
}
}
-/**
- * Update the entity of Sels to the outer value parameters.
- */
-static void update_outer_frame_sels(ir_node *irn, void *env)
-{
- lower_frame_sels_env_t *ctx = (lower_frame_sels_env_t*)env;
- ir_node *ptr;
- ir_entity *ent;
-
- if (! is_Sel(irn))
- return;
- ptr = get_Sel_ptr(irn);
- if (! is_arg_Proj(ptr))
- return;
- if (get_Proj_proj(ptr) != ctx->static_link_pos)
- return;
- ent = get_Sel_entity(irn);
-
- if (is_parameter_entity(ent)) {
- /* check, if we have not seen this entity before */
- if (get_entity_link(ent) == NULL) {
- ARR_APP1(ir_entity*, ctx->value_param_list, ent);
- /* just a mark */
- set_entity_link(ent, ctx->value_param_list);
- }
- }
-}
-
-/**
- * Fix access to outer local variables.
- */
-static void fix_outer_variable_access(be_abi_irg_t *env,
- lower_frame_sels_env_t *ctx)
-{
- int i;
- ir_graph *irg;
- (void) env;
-
- for (i = get_class_n_members(ctx->frame_tp) - 1; i >= 0; --i) {
- ir_entity *ent = get_class_member(ctx->frame_tp, i);
-
- if (! is_method_entity(ent))
- continue;
-
- irg = get_entity_irg(ent);
- if (irg == NULL)
- continue;
-
- /*
- * FIXME: find the number of the static link parameter
- * for now we assume 0 here
- */
- ctx->static_link_pos = 0;
-
- irg_walk_graph(irg, NULL, update_outer_frame_sels, ctx);
- }
-}
-
/**
* Modify the irg itself and the frame type.
*/
arg_type = compute_arg_type(irg, call, method_type, ¶m_map);
/* Convert the Sel nodes in the irg to frame addr nodes: */
- ctx.value_param_list = NEW_ARR_F(ir_entity*, 0);
ctx.frame = get_irg_frame(irg);
ctx.sp_class = arch_env->sp->reg_class;
ctx.link_class = arch_env->link_class;
default_layout_compound_type(ctx.frame_tp);
}
- irg_walk_graph(irg, lower_frame_sels_walker, NULL, &ctx);
-
/* align stackframe to 4 byte */
frame_size = get_type_size_bytes(ctx.frame_tp);
if (frame_size % 4 != 0) {
n_params = get_method_n_params(method_type);
args = OALLOCNZ(obst, ir_node*, n_params);
- /*
- * for inner function we must now fix access to outer frame entities.
- */
- fix_outer_variable_access(env, &ctx);
+ be_add_parameter_entity_stores(irg);
- /* Check if a value parameter is transmitted as a register.
- * This might happen if the address of an parameter is taken which is
- * transmitted in registers.
- *
- * Note that on some architectures this case must be handled specially
- * because the place of the backing store is determined by their ABI.
- *
- * In the default case we move the entity to the frame type and create
- * a backing store into the first block.
- */
- fix_address_of_parameter_access(env, irg, ctx.value_param_list);
+ irg_walk_graph(irg, lower_frame_sels_walker, NULL, &ctx);
- DEL_ARR_F(ctx.value_param_list);
irp_free_resources(irp, IRP_RESOURCE_ENTITY_LINK);
/* Fill the argument vector */
/* create a new initial memory proj */
assert(is_Proj(old_mem));
- arch_set_out_register_req(env->start, 0, arch_no_register_req);
+ arch_set_irn_register_req_out(env->start, 0, arch_no_register_req);
new_mem_proj = new_r_Proj(env->start, mode_M, 0);
mem = new_mem_proj;
set_irg_initial_mem(irg, mem);
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