/*
- * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
- *
* This file is part of libFirm.
- *
- * This file may be distributed and/or modified under the terms of the
- * GNU General Public License version 2 as published by the Free Software
- * Foundation and appearing in the file LICENSE.GPL included in the
- * packaging of this file.
- *
- * Licensees holding valid libFirm Professional Edition licenses may use
- * this file in accordance with the libFirm Commercial License.
- * Agreement provided with the Software.
- *
- * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE.
+ * Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief The main arm backend driver file.
* @author Matthias Braun, Oliver Richter, Tobias Gneist
- * @version $Id$
*/
#include "config.h"
#include "irgopt.h"
#include "iroptimize.h"
#include "irdump.h"
-#include "lowering.h"
+#include "lower_calls.h"
#include "error.h"
#include "bitset.h"
#include "array_t.h"
#include "irtools.h"
-#include "../bearch.h"
-#include "../benode.h"
-#include "../belower.h"
-#include "../besched.h"
+#include "bearch.h"
+#include "benode.h"
+#include "belower.h"
+#include "besched.h"
#include "be.h"
-#include "../bemachine.h"
-#include "../beilpsched.h"
-#include "../bemodule.h"
-#include "../beirg.h"
-#include "../bespillslots.h"
-#include "../begnuas.h"
-#include "../belistsched.h"
-#include "../beflags.h"
+#include "bemodule.h"
+#include "beirg.h"
+#include "bespillslots.h"
+#include "bespillutil.h"
+#include "begnuas.h"
+#include "belistsched.h"
+#include "beflags.h"
+#include "bestack.h"
#include "bearch_arm_t.h"
#include "arm_emitter.h"
#include "arm_map_regs.h"
-static arch_irn_class_t arm_classify(const ir_node *irn)
-{
- (void) irn;
- /* TODO: we should mark reload/spill instructions and classify them here */
- return 0;
-}
-
static ir_entity *arm_get_frame_entity(const ir_node *irn)
{
const arm_attr_t *attr = get_arm_attr_const(irn);
if (is_arm_FrameAddr(irn)) {
- const arm_SymConst_attr_t *attr = get_irn_generic_attr_const(irn);
- return attr->entity;
+ const arm_SymConst_attr_t *frame_attr = get_arm_SymConst_attr_const(irn);
+ return frame_attr->entity;
}
if (attr->is_load_store) {
const arm_load_store_attr_t *load_store_attr
static void arm_set_stack_bias(ir_node *irn, int bias)
{
if (is_arm_FrameAddr(irn)) {
- arm_SymConst_attr_t *attr = get_irn_generic_attr(irn);
+ arm_SymConst_attr_t *attr = get_arm_SymConst_attr(irn);
attr->fp_offset += bias;
} else {
arm_load_store_attr_t *attr = get_arm_load_store_attr(irn);
/* fill register allocator interface */
static const arch_irn_ops_t arm_irn_ops = {
- arm_classify,
arm_get_frame_entity,
arm_set_stack_bias,
arm_get_sp_bias,
- NULL, /* get_inverse */
NULL, /* get_op_estimated_cost */
NULL, /* possible_memory_operand */
NULL, /* perform_memory_operand */
* Transforms the standard Firm graph into
* a ARM firm graph.
*/
-static void arm_prepare_graph(void *self)
+static void arm_prepare_graph(ir_graph *irg)
{
- arm_code_gen_t *cg = self;
-
/* transform nodes into assembler instructions */
- arm_transform_graph(cg);
+ arm_transform_graph(irg);
/* do local optimizations (mainly CSE) */
- local_optimize_graph(cg->irg);
-
- if (cg->dump)
- dump_ir_graph(cg->irg, "transformed");
+ local_optimize_graph(irg);
/* do code placement, to optimize the position of constants */
- place_code(cg->irg);
-
- if (cg->dump)
- dump_ir_graph(cg->irg, "place");
-}
-
-/**
- * Called immediately before emit phase.
- */
-static void arm_finish_irg(void *self)
-{
- arm_code_gen_t *cg = self;
-
- /* do peephole optimizations and fix stack offsets */
- arm_peephole_optimization(cg);
-}
-
-static void arm_before_ra(void *self)
-{
- arm_code_gen_t *cg = self;
-
- be_sched_fix_flags(cg->irg, &arm_reg_classes[CLASS_arm_flags],
- NULL, NULL);
-}
-
-static void transform_Reload(ir_node *node)
-{
- ir_node *block = get_nodes_block(node);
- dbg_info *dbgi = get_irn_dbg_info(node);
- ir_node *ptr = get_irn_n(node, be_pos_Reload_frame);
- ir_node *mem = get_irn_n(node, be_pos_Reload_mem);
- ir_mode *mode = get_irn_mode(node);
- ir_entity *entity = be_get_frame_entity(node);
- const arch_register_t *reg;
- ir_node *proj;
- ir_node *load;
-
- ir_node *sched_point = sched_prev(node);
-
- load = new_bd_arm_Ldr(dbgi, block, ptr, mem, mode, entity, false, 0, true);
- sched_add_after(sched_point, load);
- sched_remove(node);
-
- proj = new_rd_Proj(dbgi, load, mode, pn_arm_Ldr_res);
-
- reg = arch_get_irn_register(node);
- arch_set_irn_register(proj, reg);
-
- exchange(node, proj);
-}
-
-static void transform_Spill(ir_node *node)
-{
- ir_node *block = get_nodes_block(node);
- dbg_info *dbgi = get_irn_dbg_info(node);
- ir_node *ptr = get_irn_n(node, be_pos_Spill_frame);
- ir_node *mem = new_NoMem();
- ir_node *val = get_irn_n(node, be_pos_Spill_val);
- ir_mode *mode = get_irn_mode(val);
- ir_entity *entity = be_get_frame_entity(node);
- ir_node *sched_point;
- ir_node *store;
-
- sched_point = sched_prev(node);
- store = new_bd_arm_Str(dbgi, block, ptr, val, mem, mode, entity, false, 0,
- true);
-
- sched_remove(node);
- sched_add_after(sched_point, store);
-
- exchange(node, store);
-}
-
-static void arm_after_ra_walker(ir_node *block, void *data)
-{
- ir_node *node, *prev;
- (void) data;
-
- for (node = sched_last(block); !sched_is_begin(node); node = prev) {
- prev = sched_prev(node);
-
- if (be_is_Reload(node)) {
- transform_Reload(node);
- } else if (be_is_Spill(node)) {
- transform_Spill(node);
- }
- }
+ place_code(irg);
}
static void arm_collect_frame_entity_nodes(ir_node *node, void *data)
{
- be_fec_env_t *env = data;
+ be_fec_env_t *env = (be_fec_env_t*)data;
const ir_mode *mode;
int align;
ir_entity *entity;
}
}
-static void arm_after_ra(void *self)
+static void transform_Reload(ir_node *node)
{
- arm_code_gen_t *cg = self;
- ir_graph *irg = cg->irg;
+ ir_node *block = get_nodes_block(node);
+ dbg_info *dbgi = get_irn_dbg_info(node);
+ ir_node *ptr = get_irn_n(node, n_be_Reload_frame);
+ ir_node *mem = get_irn_n(node, n_be_Reload_mem);
+ ir_mode *mode = get_irn_mode(node);
+ ir_entity *entity = be_get_frame_entity(node);
+ const arch_register_t *reg;
+ ir_node *proj;
+ ir_node *load;
- be_fec_env_t *fec_env = be_new_frame_entity_coalescer(irg);
+ load = new_bd_arm_Ldr(dbgi, block, ptr, mem, mode, entity, false, 0, true);
+ sched_replace(node, load);
- irg_walk_graph(irg, NULL, arm_collect_frame_entity_nodes, fec_env);
- be_assign_entities(fec_env, arm_set_frame_entity);
- be_free_frame_entity_coalescer(fec_env);
+ proj = new_rd_Proj(dbgi, load, mode, pn_arm_Ldr_res);
+
+ reg = arch_get_irn_register(node);
+ arch_set_irn_register(proj, reg);
- irg_block_walk_graph(cg->irg, NULL, arm_after_ra_walker, NULL);
+ exchange(node, proj);
}
-/**
- * Emits the code, closes the output file and frees
- * the code generator interface.
- */
-static void arm_emit_and_done(void *self)
+static void transform_Spill(ir_node *node)
{
- arm_code_gen_t *cg = self;
- ir_graph *irg = cg->irg;
+ ir_node *block = get_nodes_block(node);
+ dbg_info *dbgi = get_irn_dbg_info(node);
+ ir_node *ptr = get_irn_n(node, n_be_Spill_frame);
+ ir_graph *irg = get_irn_irg(node);
+ ir_node *mem = get_irg_no_mem(irg);
+ ir_node *val = get_irn_n(node, n_be_Spill_val);
+ ir_mode *mode = get_irn_mode(val);
+ ir_entity *entity = be_get_frame_entity(node);
+ ir_node *store;
- arm_gen_routine(cg, irg);
+ store = new_bd_arm_Str(dbgi, block, ptr, val, mem, mode, entity, false, 0,
+ true);
+ sched_replace(node, store);
- /* de-allocate code generator */
- free(self);
+ exchange(node, store);
}
-/* forward */
-static void *arm_cg_init(ir_graph *irg);
+static void arm_after_ra_walker(ir_node *block, void *data)
+{
+ (void) data;
-static const arch_code_generator_if_t arm_code_gen_if = {
- arm_cg_init,
- NULL, /* get_pic_base */
- NULL, /* before abi introduce */
- arm_prepare_graph,
- NULL, /* spill */
- arm_before_ra, /* before register allocation hook */
- arm_after_ra,
- arm_finish_irg,
- arm_emit_and_done,
-};
+ sched_foreach_reverse_safe(block, node) {
+ if (be_is_Reload(node)) {
+ transform_Reload(node);
+ } else if (be_is_Spill(node)) {
+ transform_Spill(node);
+ }
+ }
+}
/**
- * Initializes the code generator.
+ * Called immediately before emit phase.
*/
-static void *arm_cg_init(ir_graph *irg)
+static void arm_finish_irg(ir_graph *irg)
{
- arm_isa_t *isa = (arm_isa_t*) be_get_irg_arch_env(irg);
- arm_code_gen_t *cg;
+ be_stack_layout_t *stack_layout = be_get_irg_stack_layout(irg);
+ bool at_begin = stack_layout->sp_relative ? true : false;
+ be_fec_env_t *fec_env = be_new_frame_entity_coalescer(irg);
- cg = XMALLOCZ(arm_code_gen_t);
- cg->impl = &arm_code_gen_if;
- cg->irg = irg;
- cg->isa = isa;
- cg->dump = (be_get_irg_options(irg)->dump_flags & DUMP_BE) ? 1 : 0;
+ irg_walk_graph(irg, NULL, arm_collect_frame_entity_nodes, fec_env);
+ be_assign_entities(fec_env, arm_set_frame_entity, at_begin);
+ be_free_frame_entity_coalescer(fec_env);
+
+ irg_block_walk_graph(irg, NULL, arm_after_ra_walker, NULL);
- /* enter the current code generator */
- isa->cg = cg;
+ /* fix stack entity offsets */
+ be_abi_fix_stack_nodes(irg);
+ be_abi_fix_stack_bias(irg);
- return (arch_code_generator_t *)cg;
+ /* do peephole optimizations and fix stack offsets */
+ arm_peephole_optimization(irg);
}
+static void arm_before_ra(ir_graph *irg)
+{
+ be_sched_fix_flags(irg, &arm_reg_classes[CLASS_arm_flags], NULL, NULL);
+}
/**
* Maps all intrinsic calls that the backend support
rt_iDiv.mem_proj_nr = pn_Div_M;
rt_iDiv.regular_proj_nr = pn_Div_X_regular;
rt_iDiv.exc_proj_nr = pn_Div_X_except;
- rt_iDiv.exc_mem_proj_nr = pn_Div_M;
rt_iDiv.res_proj_nr = pn_Div_res;
add_entity_linkage(rt_iDiv.ent, IR_LINKAGE_CONSTANT);
rt_uDiv.mem_proj_nr = pn_Div_M;
rt_uDiv.regular_proj_nr = pn_Div_X_regular;
rt_uDiv.exc_proj_nr = pn_Div_X_except;
- rt_uDiv.exc_mem_proj_nr = pn_Div_M;
rt_uDiv.res_proj_nr = pn_Div_res;
set_entity_visibility(rt_uDiv.ent, ir_visibility_external);
rt_iMod.mem_proj_nr = pn_Mod_M;
rt_iMod.regular_proj_nr = pn_Mod_X_regular;
rt_iMod.exc_proj_nr = pn_Mod_X_except;
- rt_iMod.exc_mem_proj_nr = pn_Mod_M;
rt_iMod.res_proj_nr = pn_Mod_res;
set_entity_visibility(rt_iMod.ent, ir_visibility_external);
rt_uMod.mem_proj_nr = pn_Mod_M;
rt_uMod.regular_proj_nr = pn_Mod_X_regular;
rt_uMod.exc_proj_nr = pn_Mod_X_except;
- rt_uMod.exc_mem_proj_nr = pn_Mod_M;
rt_uMod.res_proj_nr = pn_Mod_res;
set_entity_visibility(rt_uMod.ent, ir_visibility_external);
lower_intrinsics(records, n_records, /*part_block_used=*/0);
}
-const arch_isa_if_t arm_isa_if;
+extern const arch_isa_if_t arm_isa_if;
static arm_isa_t arm_isa_template = {
{
- &arm_isa_if, /* isa interface */
- &arm_gp_regs[REG_SP], /* stack pointer */
- &arm_gp_regs[REG_R11], /* base pointer */
- &arm_reg_classes[CLASS_arm_gp], /* static link pointer class */
- -1, /* stack direction */
- 2, /* power of two stack alignment for calls, 2^2 == 4 */
- NULL, /* main environment */
- 7, /* spill costs */
- 5, /* reload costs */
- true, /* we do have custom abi handling */
+ &arm_isa_if, /* isa interface */
+ N_ARM_REGISTERS,
+ arm_registers,
+ N_ARM_CLASSES,
+ arm_reg_classes,
+ &arm_registers[REG_SP], /* stack pointer */
+ &arm_registers[REG_R11], /* base pointer */
+ 2, /* power of two stack alignment for calls, 2^2 == 4 */
+ 7, /* spill costs */
+ 5, /* reload costs */
+ true, /* we do have custom abi handling */
},
- ARM_FPU_ARCH_FPE, /* FPU architecture */
- NULL, /* current code generator */
+ ARM_FPU_ARCH_FPE, /* FPU architecture */
};
-/**
- * Initializes the backend ISA and opens the output file.
- */
-static arch_env_t *arm_init(FILE *file_handle)
+static void arm_init(void)
{
- static int inited = 0;
- arm_isa_t *isa;
-
- if (inited)
- return NULL;
-
- isa = XMALLOC(arm_isa_t);
- memcpy(isa, &arm_isa_template, sizeof(*isa));
-
arm_register_init();
- isa->cg = NULL;
- be_emit_init(file_handle);
-
arm_create_opcodes(&arm_irn_ops);
- arm_handle_intrinsics();
-
- be_gas_emit_types = false;
-
- /* needed for the debug support */
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
- be_emit_irprintf("%stext0:\n", be_gas_get_private_prefix());
- be_emit_write_line();
-
- inited = 1;
- return &isa->base;
-}
-
-
-
-/**
- * Closes the output file and frees the ISA structure.
- */
-static void arm_done(void *self)
-{
- arm_isa_t *isa = self;
-
- be_gas_emit_decls(isa->base.main_env);
-
- be_emit_exit();
- free(self);
-}
-
-
-/**
- * Report the number of register classes.
- * If we don't have fp instructions, report only GP
- * here to speed up register allocation (and makes dumps
- * smaller and more readable).
- */
-static unsigned arm_get_n_reg_class(void)
-{
- return N_CLASSES;
-}
-
-/**
- * Return the register class with requested index.
- */
-static const arch_register_class_t *arm_get_reg_class(unsigned i)
-{
- assert(i < N_CLASSES);
- return &arm_reg_classes[i];
}
-/**
- * Get the register class which shall be used to store a value of a given mode.
- * @param self The this pointer.
- * @param mode The mode in question.
- * @return A register class which can hold values of the given mode.
- */
-static const arch_register_class_t *arm_get_reg_class_for_mode(const ir_mode *mode)
+static void arm_finish(void)
{
- if (mode_is_float(mode))
- return &arm_reg_classes[CLASS_arm_fpa];
- else
- return &arm_reg_classes[CLASS_arm_gp];
+ arm_free_opcodes();
}
-static int arm_to_appear_in_schedule(void *block_env, const ir_node *irn)
+static arch_env_t *arm_begin_codegeneration(void)
{
- (void) block_env;
- if (!is_arm_irn(irn))
- return -1;
-
- return 1;
-}
-
-/**
- * Initializes the code generator interface.
- */
-static const arch_code_generator_if_t *arm_get_code_generator_if(void *self)
-{
- (void) self;
- return &arm_code_gen_if;
-}
-
-list_sched_selector_t arm_sched_selector;
+ arm_isa_t *isa = XMALLOC(arm_isa_t);
+ *isa = arm_isa_template;
-/**
- * Returns the reg_pressure scheduler with to_appear_in_schedule() over\loaded
- */
-static const list_sched_selector_t *arm_get_list_sched_selector(const void *self, list_sched_selector_t *selector)
-{
- (void) self;
- memcpy(&arm_sched_selector, selector, sizeof(arm_sched_selector));
- /* arm_sched_selector.exectime = arm_sched_exectime; */
- arm_sched_selector.to_appear_in_schedule = arm_to_appear_in_schedule;
- return &arm_sched_selector;
-
-}
-
-static const ilp_sched_selector_t *arm_get_ilp_sched_selector(const void *self)
-{
- (void) self;
- return NULL;
-}
-
-/**
- * Returns the necessary byte alignment for storing a register of given class.
- */
-static int arm_get_reg_class_alignment(const arch_register_class_t *cls)
-{
- (void) cls;
- /* ARM is a 32 bit CPU, no need for other alignment */
- return 4;
-}
-
-static const be_execution_unit_t ***arm_get_allowed_execution_units(const ir_node *irn)
-{
- (void) irn;
- /* TODO */
- panic("Unimplemented arm_get_allowed_execution_units()");
-}
+ be_gas_emit_types = false;
-static const be_machine_t *arm_get_machine(const void *self)
-{
- (void) self;
- /* TODO */
- panic("Unimplemented arm_get_machine()");
+ return &isa->base;
}
/**
- * Return irp irgs in the desired order.
+ * Closes the output file and frees the ISA structure.
*/
-static ir_graph **arm_get_irg_list(const void *self, ir_graph ***irg_list)
+static void arm_end_codegeneration(void *self)
{
- (void) self;
- (void) irg_list;
- return NULL;
+ free(self);
}
/**
(void) sel;
(void) mux_false;
(void) mux_true;
-
- return 0;
+ return false;
}
static asm_constraint_flags_t arm_parse_asm_constraint(const char **c)
static void arm_lower_for_target(void)
{
- int i;
- int n_irgs = get_irp_n_irgs();
+ ir_mode *mode_gp = arm_reg_classes[CLASS_arm_gp].mode;
+ size_t i, n_irgs = get_irp_n_irgs();
+
+ /* lower compound param handling */
+ lower_calls_with_compounds(LF_RETURN_HIDDEN);
+
+ for (i = 0; i < n_irgs; ++i) {
+ ir_graph *irg = get_irp_irg(i);
+ lower_switch(irg, 4, 256, mode_gp);
+ }
for (i = 0; i < n_irgs; ++i) {
ir_graph *irg = get_irp_irg(i);
- lower_switch(irg, 256, true);
+ /* Turn all small CopyBs into loads/stores and all bigger CopyBs into
+ * memcpy calls.
+ * TODO: These constants need arm-specific tuning. */
+ lower_CopyB(irg, 31, 32, false);
}
}
{
static ir_settings_arch_dep_t ad = {
1, /* allow subs */
- 1, /* Muls are fast enough on ARM but ... */
+ 1, /* Muls are fast enough on ARM but ... */
31, /* ... one shift would be possible better */
NULL, /* no evaluator function */
0, /* SMUL is needed, only in Arch M */
0, /* don't support inline assembler yet */
1, /* support Rotl nodes */
1, /* big endian */
- arm_lower_for_target, /* lowering function */
+ 1, /* modulo shift efficient */
+ 0, /* non-modulo shift not efficient */
&ad, /* will be set later */
arm_is_mux_allowed, /* allow_ifconv function */
+ 32, /* machine size */
NULL, /* float arithmetic mode (TODO) */
+ NULL, /* long long type */
+ NULL, /* unsigned long long type */
+ NULL, /* long double type */
0, /* no trampoline support: size 0 */
0, /* no trampoline support: align 0 */
NULL, /* no trampoline support: no trampoline builder */
const arch_isa_if_t arm_isa_if = {
arm_init,
- arm_done,
- NULL, /* handle_intrinsics */
- arm_get_n_reg_class,
- arm_get_reg_class,
- arm_get_reg_class_for_mode,
- NULL,
- arm_get_code_generator_if,
- arm_get_list_sched_selector,
- arm_get_ilp_sched_selector,
- arm_get_reg_class_alignment,
+ arm_finish,
arm_get_libfirm_params,
- arm_get_allowed_execution_units,
- arm_get_machine,
- arm_get_irg_list,
- NULL, /* mark remat */
+ arm_lower_for_target,
arm_parse_asm_constraint,
- arm_is_valid_clobber
+ arm_is_valid_clobber,
+
+ arm_begin_codegeneration,
+ arm_end_codegeneration,
+ NULL,
+ NULL, /* get call abi */
+ NULL, /* mark remat */
+ NULL, /* get_pic_base */
+ be_new_spill,
+ be_new_reload,
+ NULL, /* register_saved_by */
+
+ arm_handle_intrinsics, /* handle_intrinsics */
+ NULL, /* before_abi */
+ arm_prepare_graph,
+ arm_before_ra,
+ arm_finish_irg,
+ arm_gen_routine,
};
-BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_arm);
+BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_arm)
void be_init_arch_arm(void)
{
lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
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