/**
* @file
* @brief emit assembler for a backend graph
+ * @author Hannes Rapp, Matthias Braun
* @version $Id$
*/
#include "config.h"
#include "error.h"
#include "raw_bitset.h"
#include "dbginfo.h"
+#include "heights.h"
#include "../besched.h"
#include "../beblocksched.h"
#include "../begnuas.h"
#include "../be_dbgout.h"
#include "../benode.h"
+#include "../bestack.h"
#include "sparc_emitter.h"
#include "gen_sparc_emitter.h"
DEBUG_ONLY(static firm_dbg_module_t *dbg = NULL;)
+static ir_heights_t *heights;
+static const ir_node *delay_slot_filler; /**< this node has been choosen to fill
+ the next delay slot */
+
+static void sparc_emit_node(const ir_node *node);
+
/**
* Returns the register at in position pos.
*/
return reg;
}
-static bool is_valid_immediate(int32_t value)
-{
- return -4096 <= value && value < 4096;
-}
-
void sparc_emit_immediate(const ir_node *node)
{
const sparc_attr_t *attr = get_sparc_attr_const(node);
if (entity == NULL) {
int32_t value = attr->immediate_value;
- assert(is_valid_immediate(value));
+ assert(sparc_is_value_imm_encodeable(value));
be_emit_irprintf("%d", value);
} else {
be_emit_cstring("%lo(");
*/
void sparc_emit_reg_or_imm(const ir_node *node, int pos)
{
- if (get_irn_arity(node) > pos) {
- // we have reg input
- sparc_emit_source_register(node, pos);
- } else {
+ if (arch_irn_get_flags(node) & ((arch_irn_flags_t)sparc_arch_irn_flag_immediate_form)) {
// we have a imm input
sparc_emit_immediate(node);
+ } else {
+ // we have reg input
+ sparc_emit_source_register(node, pos);
}
}
-static bool is_stack_pointer_relative(const ir_node *node)
-{
- const arch_register_t *sp = &sparc_gp_regs[REG_SP];
- return (is_sparc_St(node) && get_in_reg(node, n_sparc_St_ptr) == sp)
- || (is_sparc_Ld(node) && get_in_reg(node, n_sparc_Ld_ptr) == sp);
-}
-
/**
* emit SP offset
*/
sparc_emit_source_register(node, offset_node_pos);
} else if (attr->is_frame_entity) {
int32_t offset = attr->base.immediate_value;
- /* bad hack: the real stack stuff is behind the always-there spill
- * space for the register window and stack */
- if (is_stack_pointer_relative(node))
- offset += SPARC_MIN_STACKSIZE;
if (offset != 0) {
- assert(is_valid_immediate(offset));
+ assert(sparc_is_value_imm_encodeable(offset));
be_emit_irprintf("%+ld", offset);
}
} else if (attr->base.immediate_value != 0
static ir_node *get_jump_target(const ir_node *jump)
{
- return get_irn_link(jump);
+ return (ir_node*)get_irn_link(jump);
}
/**
be_gas_emit_block_name(block);
}
+static int get_sparc_Call_dest_addr_pos(const ir_node *node)
+{
+ return get_irn_arity(node)-1;
+}
+
+static bool ba_is_fallthrough(const ir_node *node)
+{
+ ir_node *block = get_nodes_block(node);
+ ir_node *next_block = (ir_node*)get_irn_link(block);
+ return get_irn_link(node) == next_block;
+}
+
+static bool is_no_instruction(const ir_node *node)
+{
+ /* copies are nops if src_reg == dest_reg */
+ if (be_is_Copy(node) || be_is_CopyKeep(node)) {
+ const arch_register_t *src_reg = get_in_reg(node, 0);
+ const arch_register_t *dest_reg = get_out_reg(node, 0);
+
+ if (src_reg == dest_reg)
+ return true;
+ }
+ if (be_is_IncSP(node) && be_get_IncSP_offset(node) == 0)
+ return true;
+ /* Ba is not emitted if it is a simple fallthrough */
+ if (is_sparc_Ba(node) && ba_is_fallthrough(node))
+ return true;
+
+ return be_is_Keep(node) || be_is_Start(node) || is_Phi(node);
+}
+
+static bool has_delay_slot(const ir_node *node)
+{
+ if (is_sparc_Ba(node) && ba_is_fallthrough(node))
+ return false;
+
+ return is_sparc_Bicc(node) || is_sparc_fbfcc(node) || is_sparc_Ba(node)
+ || is_sparc_SwitchJmp(node) || is_sparc_Call(node)
+ || is_sparc_SDiv(node) || is_sparc_UDiv(node)
+ || be_is_Return(node);
+}
+
+/** returns true if the emitter for this sparc node can produce more than one
+ * actual sparc instruction.
+ * Usually it is a bad sign if we have to add instructions here. We should
+ * rather try to get them lowered down. So we can actually put them into
+ * delay slots and make them more accessible to the scheduler.
+ */
+static bool emits_multiple_instructions(const ir_node *node)
+{
+ if (has_delay_slot(node))
+ return true;
+
+ return is_sparc_Mulh(node) || is_sparc_SDiv(node) || is_sparc_UDiv(node)
+ || be_is_MemPerm(node) || be_is_Perm(node);
+}
+
/**
- * Emit single entity
+ * search for an instruction that can fill the delay slot of @p node
*/
-static void sparc_emit_entity(ir_entity *entity)
+static const ir_node *pick_delay_slot_for(const ir_node *node)
{
- be_gas_emit_entity(entity);
+ const ir_node *check = node;
+ const ir_node *schedpoint = node;
+ unsigned tries = 0;
+ /* currently we don't track which registers are still alive, so we can't
+ * pick any other instructions other than the one directly preceding */
+ static const unsigned PICK_DELAY_SLOT_MAX_DISTANCE = 1;
+
+ assert(has_delay_slot(node));
+
+ if (is_sparc_Call(node)) {
+ const sparc_attr_t *attr = get_sparc_attr_const(node);
+ ir_entity *entity = attr->immediate_value_entity;
+ if (entity != NULL) {
+ check = NULL; /* pick any instruction, dependencies on Call
+ don't matter */
+ } else {
+ /* we only need to check the value for the call destination */
+ check = get_irn_n(node, get_sparc_Call_dest_addr_pos(node));
+ }
+
+ /* the Call also destroys the value of %o7, but since this is currently
+ * marked as ignore register in the backend, it should never be used by
+ * the instruction in the delay slot. */
+ } else if (be_is_Return(node)) {
+ /* we only have to check the jump destination value */
+ int arity = get_irn_arity(node);
+ int i;
+
+ check = NULL;
+ for (i = 0; i < arity; ++i) {
+ ir_node *in = get_irn_n(node, i);
+ const arch_register_t *reg = arch_get_irn_register(in);
+ if (reg == &sparc_registers[REG_O7]) {
+ check = skip_Proj(in);
+ break;
+ }
+ }
+ } else {
+ check = node;
+ }
+
+ while (sched_has_prev(schedpoint)) {
+ schedpoint = sched_prev(schedpoint);
+
+ if (has_delay_slot(schedpoint))
+ break;
+
+ /* skip things which don't really result in instructions */
+ if (is_no_instruction(schedpoint))
+ continue;
+
+ if (tries++ >= PICK_DELAY_SLOT_MAX_DISTANCE)
+ break;
+
+ if (emits_multiple_instructions(schedpoint))
+ continue;
+
+ /* allowed for delayslot: any instruction which is not necessary to
+ * compute an input to the branch. */
+ if (check != NULL
+ && heights_reachable_in_block(heights, check, schedpoint))
+ continue;
+
+ /* found something */
+ return schedpoint;
+ }
+
+ return NULL;
}
/**
*/
static void emit_be_IncSP(const ir_node *irn)
{
- int offs = -be_get_IncSP_offset(irn);
+ int offset = be_get_IncSP_offset(irn);
- if (offs == 0)
- return;
+ if (offset == 0)
+ return;
/* SPARC stack grows downwards */
- if (offs < 0) {
+ if (offset < 0) {
be_emit_cstring("\tsub ");
- offs = -offs;
+ offset = -offset;
} else {
be_emit_cstring("\tadd ");
}
sparc_emit_source_register(irn, 0);
- be_emit_irprintf(", %d", offs);
+ be_emit_irprintf(", %d", -offset);
be_emit_cstring(", ");
sparc_emit_dest_register(irn, 0);
be_emit_finish_line_gas(irn);
}
-/**
- * emits code for save instruction with min. required stack space
- */
-static void emit_sparc_Save(const ir_node *irn)
-{
- const sparc_save_attr_t *save_attr = get_sparc_save_attr_const(irn);
- be_emit_cstring("\tsave ");
- sparc_emit_source_register(irn, 0);
- be_emit_irprintf(", %d, ", -save_attr->initial_stacksize);
- sparc_emit_dest_register(irn, 0);
- be_emit_finish_line_gas(irn);
-}
-
/**
* emits code for mulh
*/
static void fill_delay_slot(void)
{
- be_emit_cstring("\tnop\n");
- be_emit_write_line();
+ if (delay_slot_filler != NULL) {
+ sparc_emit_node(delay_slot_filler);
+ delay_slot_filler = NULL;
+ } else {
+ be_emit_cstring("\tnop\n");
+ be_emit_write_line();
+ }
}
static void emit_sparc_Div(const ir_node *node, bool is_signed)
emit_sparc_Div(node, false);
}
-/**
- * Emits code for return node
- */
-static void emit_be_Return(const ir_node *irn)
-{
- be_emit_cstring("\tret");
- //be_emit_cstring("\tjmp %i7+8");
- be_emit_finish_line_gas(irn);
- be_emit_cstring("\trestore");
- be_emit_finish_line_gas(irn);
-}
-
/**
* Emits code for Call node
*/
be_emit_cstring("\tcall ");
if (entity != NULL) {
- sparc_emit_entity(entity);
+ be_gas_emit_entity(entity);
if (attr->immediate_value != 0) {
be_emit_irprintf("%+d", attr->immediate_value);
}
be_emit_cstring(", 0");
} else {
- int last = get_irn_arity(node);
- sparc_emit_source_register(node, last-1);
+ int dest_addr = get_sparc_Call_dest_addr_pos(node);
+ sparc_emit_source_register(node, dest_addr);
}
be_emit_finish_line_gas(node);
be_emit_finish_line_gas(irn);
}
-/**
- * TODO: not really tested but seems to work with memperm_arity == 1
- */
static void emit_be_MemPerm(const ir_node *node)
{
int i;
assert(sp_change == 0);
}
-/**
- * Emits code for FrameAddr fix
- */
+static void emit_be_Return(const ir_node *node)
+{
+ const char *destreg = "%o7";
+
+ /* hack: we don't explicitely model register changes because of the
+ * restore node. So we have to do it manually here */
+ if (delay_slot_filler != NULL &&
+ (is_sparc_Restore(delay_slot_filler)
+ || is_sparc_RestoreZero(delay_slot_filler))) {
+ destreg = "%i7";
+ }
+ be_emit_cstring("\tjmp ");
+ be_emit_string(destreg);
+ be_emit_cstring("+8");
+ be_emit_finish_line_gas(node);
+ fill_delay_slot();
+}
+
static void emit_sparc_FrameAddr(const ir_node *node)
{
- const sparc_attr_t *attr = get_sparc_attr_const(node);
+ const sparc_attr_t *attr = get_sparc_attr_const(node);
+ int32_t offset = attr->immediate_value;
- // no need to fix offset as we are adressing via the framepointer
- if (attr->immediate_value >= 0) {
+ if (offset < 0) {
be_emit_cstring("\tadd ");
sparc_emit_source_register(node, 0);
be_emit_cstring(", ");
- be_emit_irprintf("%ld", attr->immediate_value);
+ assert(sparc_is_value_imm_encodeable(offset));
+ be_emit_irprintf("%ld", offset);
} else {
be_emit_cstring("\tsub ");
sparc_emit_source_register(node, 0);
be_emit_cstring(", ");
- be_emit_irprintf("%ld", -attr->immediate_value);
+ assert(sparc_is_value_imm_encodeable(-offset));
+ be_emit_irprintf("%ld", -offset);
}
be_emit_cstring(", ");
be_emit_finish_line_gas(node);
}
-static const char *get_icc_unsigned(pn_Cmp pnc)
+static const char *get_icc_unsigned(ir_relation relation)
{
- switch (pnc) {
- case pn_Cmp_False: return "bn";
- case pn_Cmp_Eq: return "be";
- case pn_Cmp_Lt: return "blu";
- case pn_Cmp_Le: return "bleu";
- case pn_Cmp_Gt: return "bgu";
- case pn_Cmp_Ge: return "bgeu";
- case pn_Cmp_Lg: return "bne";
- case pn_Cmp_Leg: return "ba";
- default: panic("Cmp has unsupported pnc");
+ switch (relation & (ir_relation_less_equal_greater)) {
+ case ir_relation_false: return "bn";
+ case ir_relation_equal: return "be";
+ case ir_relation_less: return "blu";
+ case ir_relation_less_equal: return "bleu";
+ case ir_relation_greater: return "bgu";
+ case ir_relation_greater_equal: return "bgeu";
+ case ir_relation_less_greater: return "bne";
+ case ir_relation_less_equal_greater: return "ba";
+ default: panic("Cmp has unsupported relation");
}
}
-static const char *get_icc_signed(pn_Cmp pnc)
+static const char *get_icc_signed(ir_relation relation)
{
- switch (pnc) {
- case pn_Cmp_False: return "bn";
- case pn_Cmp_Eq: return "be";
- case pn_Cmp_Lt: return "bl";
- case pn_Cmp_Le: return "ble";
- case pn_Cmp_Gt: return "bg";
- case pn_Cmp_Ge: return "bge";
- case pn_Cmp_Lg: return "bne";
- case pn_Cmp_Leg: return "ba";
- default: panic("Cmp has unsupported pnc");
+ switch (relation & (ir_relation_less_equal_greater)) {
+ case ir_relation_false: return "bn";
+ case ir_relation_equal: return "be";
+ case ir_relation_less: return "bl";
+ case ir_relation_less_equal: return "ble";
+ case ir_relation_greater: return "bg";
+ case ir_relation_greater_equal: return "bge";
+ case ir_relation_less_greater: return "bne";
+ case ir_relation_less_equal_greater: return "ba";
+ default: panic("Cmp has unsupported relation");
}
}
-static const char *get_fcc(pn_Cmp pnc)
+static const char *get_fcc(ir_relation relation)
{
- switch (pnc) {
- case pn_Cmp_False: return "fbn";
- case pn_Cmp_Eq: return "fbe";
- case pn_Cmp_Lt: return "fbl";
- case pn_Cmp_Le: return "fble";
- case pn_Cmp_Gt: return "fbg";
- case pn_Cmp_Ge: return "fbge";
- case pn_Cmp_Lg: return "fblg";
- case pn_Cmp_Leg: return "fbo";
- case pn_Cmp_Uo: return "fbu";
- case pn_Cmp_Ue: return "fbue";
- case pn_Cmp_Ul: return "fbul";
- case pn_Cmp_Ule: return "fbule";
- case pn_Cmp_Ug: return "fbug";
- case pn_Cmp_Uge: return "fbuge";
- case pn_Cmp_Ne: return "fbne";
- case pn_Cmp_True: return "fba";
- case pn_Cmp_max:
- break;
+ switch (relation) {
+ case ir_relation_false: return "fbn";
+ case ir_relation_equal: return "fbe";
+ case ir_relation_less: return "fbl";
+ case ir_relation_less_equal: return "fble";
+ case ir_relation_greater: return "fbg";
+ case ir_relation_greater_equal: return "fbge";
+ case ir_relation_less_greater: return "fblg";
+ case ir_relation_less_equal_greater: return "fbo";
+ case ir_relation_unordered: return "fbu";
+ case ir_relation_unordered_equal: return "fbue";
+ case ir_relation_unordered_less: return "fbul";
+ case ir_relation_unordered_less_equal: return "fbule";
+ case ir_relation_unordered_greater: return "fbug";
+ case ir_relation_unordered_greater_equal: return "fbuge";
+ case ir_relation_unordered_less_greater: return "fbne";
+ case ir_relation_true: return "fba";
}
- panic("invalid pnc");
+ panic("invalid relation");
}
-typedef const char* (*get_cc_func)(pn_Cmp pnc);
+typedef const char* (*get_cc_func)(ir_relation relation);
-/**
- * Emits code for Branch
- */
static void emit_sparc_branch(const ir_node *node, get_cc_func get_cc)
{
const sparc_jmp_cond_attr_t *attr = get_sparc_jmp_cond_attr_const(node);
- pn_Cmp pnc = attr->pnc;
+ ir_relation relation = attr->relation;
const ir_node *proj_true = NULL;
const ir_node *proj_false = NULL;
const ir_edge_t *edge;
block = get_nodes_block(node);
/* we have a block schedule */
- next_block = get_irn_link(block);
+ next_block = (ir_node*)get_irn_link(block);
if (get_irn_link(proj_true) == next_block) {
/* exchange both proj's so the second one can be omitted */
proj_true = proj_false;
proj_false = t;
- if (is_sparc_fbfcc(node)) {
- pnc = get_negated_pnc(pnc, mode_F);
- } else {
- pnc = get_negated_pnc(pnc, mode_Iu);
- }
+ relation = get_negated_relation(relation);
}
/* emit the true proj */
be_emit_cstring("\t");
- be_emit_string(get_cc(pnc));
+ be_emit_string(get_cc(relation));
be_emit_char(' ');
sparc_emit_cfop_target(proj_true);
be_emit_finish_line_gas(proj_true);
emit_sparc_branch(node, get_fcc);
}
-/**
- * emit Jmp (which actually is a branch always (ba) instruction)
- */
static void emit_sparc_Ba(const ir_node *node)
{
- ir_node *block, *next_block;
-
- /* for now, the code works for scheduled and non-schedules blocks */
- block = get_nodes_block(node);
-
- /* we have a block schedule */
- next_block = get_irn_link(block);
- if (get_irn_link(node) != next_block) {
+ if (ba_is_fallthrough(node)) {
+ be_emit_cstring("\t/* fallthrough to ");
+ sparc_emit_cfop_target(node);
+ be_emit_cstring(" */");
+ } else {
be_emit_cstring("\tba ");
sparc_emit_cfop_target(node);
be_emit_finish_line_gas(node);
fill_delay_slot();
- } else {
- be_emit_cstring("\t/* fallthrough to ");
- sparc_emit_cfop_target(node);
- be_emit_cstring(" */");
}
be_emit_finish_line_gas(node);
}
-static void emit_jump_table(const ir_node *node)
+static void emit_sparc_SwitchJmp(const ir_node *node)
{
const sparc_switch_jmp_attr_t *attr = get_sparc_switch_jmp_attr_const(node);
- long switch_min = LONG_MAX;
- long switch_max = LONG_MIN;
- long default_pn = attr->default_proj_num;
- ir_entity *entity = attr->jump_table;
- ir_node *default_block = NULL;
- unsigned length;
- const ir_edge_t *edge;
- unsigned i;
- ir_node **table;
-
- /* go over all proj's and collect them */
- foreach_out_edge(node, edge) {
- ir_node *proj = get_edge_src_irn(edge);
- long pn = get_Proj_proj(proj);
-
- /* check for default proj */
- if (pn == default_pn) {
- assert(default_block == NULL); /* more than 1 default_pn? */
- default_block = get_jump_target(proj);
- } else {
- switch_min = pn < switch_min ? pn : switch_min;
- switch_max = pn > switch_max ? pn : switch_max;
- }
- }
- length = (unsigned long) (switch_max - switch_min) + 1;
- assert(switch_min < LONG_MAX || switch_max > LONG_MIN);
-
- table = XMALLOCNZ(ir_node*, length);
- foreach_out_edge(node, edge) {
- ir_node *proj = get_edge_src_irn(edge);
- long pn = get_Proj_proj(proj);
- if (pn == default_pn)
- continue;
- table[pn - switch_min] = get_jump_target(proj);
- }
-
- /* emit table */
- be_gas_emit_switch_section(GAS_SECTION_RODATA);
- be_emit_cstring("\t.align 4\n");
- be_gas_emit_entity(entity);
- be_emit_cstring(":\n");
- for (i = 0; i < length; ++i) {
- ir_node *block = table[i];
- if (block == NULL)
- block = default_block;
- be_emit_cstring("\t.long ");
- be_gas_emit_block_name(block);
- be_emit_char('\n');
- be_emit_write_line();
- }
- be_gas_emit_switch_section(GAS_SECTION_TEXT);
-
- xfree(table);
-}
-
-static void emit_sparc_SwitchJmp(const ir_node *node)
-{
be_emit_cstring("\tjmp ");
sparc_emit_source_register(node, 0);
be_emit_finish_line_gas(node);
fill_delay_slot();
- emit_jump_table(node);
+ emit_jump_table(node, attr->default_proj_num, attr->jump_table,
+ get_jump_target);
}
static void emit_fmov(const ir_node *node, const arch_register_t *src_reg,
const arch_register_t *dst_reg)
{
- be_emit_cstring("\tfmov ");
+ be_emit_cstring("\tfmovs %");
be_emit_string(arch_register_get_name(src_reg));
- be_emit_cstring(", ");
+ be_emit_cstring(", %");
be_emit_string(arch_register_get_name(dst_reg));
be_emit_finish_line_gas(node);
}
static const arch_register_t *get_next_fp_reg(const arch_register_t *reg)
{
- unsigned index = reg->index;
- assert(reg == &sparc_fp_regs[index]);
- index++;
- assert(index < N_sparc_fp_REGS);
- return &sparc_fp_regs[index];
+ unsigned idx = reg->global_index;
+ assert(reg == &sparc_registers[idx]);
+ idx++;
+ assert(idx - REG_F0 < N_sparc_fp_REGS);
+ return &sparc_registers[idx];
}
-/**
- * emit copy node
- */
static void emit_be_Copy(const ir_node *node)
{
ir_mode *mode = get_irn_mode(node);
}
}
-
-/**
- * dummy emitter for ignored nodes
- */
static void emit_nothing(const ir_node *irn)
{
(void) irn;
}
-/**
- * type of emitter function
- */
typedef void (*emit_func) (const ir_node *);
-/**
- * Set a node emitter. Make it a bit more type safe.
- */
static inline void set_emitter(ir_op *op, emit_func sparc_emit_node)
{
op->ops.generic = (op_func)sparc_emit_node;
set_emitter(op_sparc_fbfcc, emit_sparc_fbfcc);
set_emitter(op_sparc_FrameAddr, emit_sparc_FrameAddr);
set_emitter(op_sparc_Mulh, emit_sparc_Mulh);
- set_emitter(op_sparc_Save, emit_sparc_Save);
set_emitter(op_sparc_SDiv, emit_sparc_SDiv);
set_emitter(op_sparc_SwitchJmp, emit_sparc_SwitchJmp);
set_emitter(op_sparc_UDiv, emit_sparc_UDiv);
/* no need to emit anything for the following nodes */
- set_emitter(op_be_Barrier, emit_nothing);
set_emitter(op_be_Keep, emit_nothing);
set_emitter(op_be_Start, emit_nothing);
set_emitter(op_Phi, emit_nothing);
be_dbg_set_dbg_info(get_irn_dbg_info(node));
(*func) (node);
} else {
- panic("No emit handler for node %+F (graph %+F)\n", node,
+ panic("No emit handler for node %+F (graph %+F)\n", node,
current_ir_graph);
}
}
+static ir_node *find_next_delay_slot(ir_node *from)
+{
+ ir_node *schedpoint = from;
+ while (!has_delay_slot(schedpoint)) {
+ if (!sched_has_next(schedpoint))
+ return NULL;
+ schedpoint = sched_next(schedpoint);
+ }
+ return schedpoint;
+}
+
/**
* Walks over the nodes in a block connected by scheduling edges
* and emits code for each node.
*/
-static void sparc_gen_block(ir_node *block, void *data)
+static void sparc_emit_block(ir_node *block)
{
ir_node *node;
- (void) data;
+ ir_node *next_delay_slot;
- if (! is_Block(block))
- return;
+ assert(is_Block(block));
be_gas_emit_block_name(block);
be_emit_cstring(":\n");
be_emit_write_line();
+ next_delay_slot = find_next_delay_slot(sched_first(block));
+ if (next_delay_slot != NULL)
+ delay_slot_filler = pick_delay_slot_for(next_delay_slot);
+
sched_foreach(block, node) {
+ if (node == delay_slot_filler) {
+ continue;
+ }
+
sparc_emit_node(node);
+
+ if (node == next_delay_slot) {
+ assert(delay_slot_filler == NULL);
+ next_delay_slot = find_next_delay_slot(sched_next(node));
+ if (next_delay_slot != NULL)
+ delay_slot_filler = pick_delay_slot_for(next_delay_slot);
+ }
}
}
-
/**
* Emits code for function start.
*/
be_emit_write_line();
}
-/**
- * Block-walker:
- * TODO: Sets labels for control flow nodes (jump target).
- * Links control predecessors to there destination blocks.
- */
static void sparc_gen_labels(ir_node *block, void *env)
{
ir_node *pred;
}
}
-
-/**
- * Main driver
- */
-void sparc_gen_routine(const sparc_code_gen_t *cg, ir_graph *irg)
+void sparc_emit_routine(ir_graph *irg)
{
- ir_node **blk_sched;
- ir_node *last_block = NULL;
- ir_entity *entity = get_irg_entity(irg);
- int i, n;
- (void) cg;
+ ir_entity *entity = get_irg_entity(irg);
+ ir_node **block_schedule;
+ size_t i;
+ size_t n;
- be_gas_elf_type_char = '#';
+ be_gas_elf_type_char = '#';
be_gas_object_file_format = OBJECT_FILE_FORMAT_ELF_SPARC;
+ heights = heights_new(irg);
+
/* register all emitter functions */
sparc_register_emitters();
be_dbg_method_begin(entity);
/* create the block schedule. For now, we don't need it earlier. */
- blk_sched = be_create_block_schedule(irg);
+ block_schedule = be_create_block_schedule(irg);
- // emit function prolog
sparc_emit_func_prolog(irg);
-
- // generate BLOCK labels
irg_block_walk_graph(irg, sparc_gen_labels, NULL, NULL);
- // inject block scheduling links & emit code of each block
- n = ARR_LEN(blk_sched);
- for (i = 0; i < n;) {
- ir_node *block, *next_bl;
-
- block = blk_sched[i];
- ++i;
- next_bl = i < n ? blk_sched[i] : NULL;
+ /* inject block scheduling links & emit code of each block */
+ n = ARR_LEN(block_schedule);
+ for (i = 0; i < n; ++i) {
+ ir_node *block = block_schedule[i];
+ ir_node *next_block = i+1 < n ? block_schedule[i+1] : NULL;
+ set_irn_link(block, next_block);
+ }
- /* set here the link. the emitter expects to find the next block here */
- set_irn_link(block, next_bl);
- sparc_gen_block(block, last_block);
- last_block = block;
+ for (i = 0; i < n; ++i) {
+ ir_node *block = block_schedule[i];
+ if (block == get_irg_end_block(irg))
+ continue;
+ sparc_emit_block(block);
}
- // emit function epilog
+ /* emit function epilog */
sparc_emit_func_epilog(irg);
+
+ heights_free(heights);
}
void sparc_init_emitter(void)
projects / libfirm / blobdiff