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ir_emit_c.c
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ir_emit_c.c
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/*
* IR - Lightweight JIT Compilation Framework
* (C code generator)
* Copyright (C) 2022 Zend by Perforce.
* Authors: Dmitry Stogov <[email protected]>
*/
#include "ir.h"
#include "ir_private.h"
#define IR_TYPE_TNAME(name, type, field, flags) #field,
static const char *ir_type_tname[IR_LAST_TYPE] = {
NULL,
IR_TYPES(IR_TYPE_TNAME)
};
static int ir_add_tmp_type(ir_ctx *ctx, uint8_t type, ir_ref from, ir_ref to)
{
if (from == 0) {
ir_bitset tmp_types = ctx->data;
ir_bitset_incl(tmp_types, type);
}
return 1;
}
static int ir_emit_dessa_move(ir_ctx *ctx, uint8_t type, ir_ref from, ir_ref to)
{
FILE *f = ctx->data;
if (to) {
fprintf(f, "\td_%d = ", ctx->vregs[to]);
} else {
fprintf(f, "\ttmp_%s = ", ir_type_tname[type]);
}
if (IR_IS_CONST_REF(from)) {
ir_print_const(ctx, &ctx->ir_base[from], f, true);
fprintf(f, ";\n");
} else if (from) {
fprintf(f, "d_%d;\n", ctx->vregs[from]);
} else {
fprintf(f, "tmp_%s;\n", ir_type_tname[type]);
}
return 1;
}
static void ir_emit_ref(ir_ctx *ctx, FILE *f, ir_ref ref)
{
if (IR_IS_CONST_REF(ref)) {
ir_print_const(ctx, &ctx->ir_base[ref], f, true);
} else {
ir_insn *insn = &ctx->ir_base[ref];
if (insn->op == IR_VLOAD) {
ir_insn *var = &ctx->ir_base[insn->op2];
IR_ASSERT(var->op == IR_VAR/* || var->op == IR_PARAM*/);
fprintf(f, "%s", ir_get_str(ctx, var->op2));
return;
}
fprintf(f, "d_%d", ctx->vregs[ref]);
}
}
static void ir_emit_def_ref(ir_ctx *ctx, FILE *f, ir_ref def)
{
ir_use_list *use_list = &ctx->use_lists[def];
if (use_list->count == 1) {
ir_ref use = ctx->use_edges[use_list->refs];
ir_insn *insn = &ctx->ir_base[use];
if (insn->op == IR_VSTORE) {
ir_insn *var = &ctx->ir_base[insn->op2];
IR_ASSERT(var->op == IR_VAR/* || var->op == IR_PARAM*/);
fprintf(f, "\t%s = ", ir_get_str(ctx, var->op2));
return;
}
}
IR_ASSERT(ctx->vregs[def]);
fprintf(f, "\td_%d = ", ctx->vregs[def]);
}
static void ir_emit_copy(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
ir_emit_def_ref(ctx, f, def);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
}
static void ir_emit_unary_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *op)
{
ir_emit_def_ref(ctx, f, def);
fprintf(f, "%s", op);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
}
static void ir_emit_binary_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *op)
{
ir_emit_def_ref(ctx, f, def);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s ", op);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
}
static void ir_emit_signed_cast(FILE *f, ir_type type)
{
if (!IR_IS_TYPE_SIGNED(type)) {
switch (ir_type_size[type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(int8_t)");
break;
case 2:
fprintf(f, "(int16_t)");
break;
case 4:
fprintf(f, "(int32_t)");
break;
case 8:
fprintf(f, "(int64_t)");
break;
}
}
}
static void ir_emit_unsigned_cast(FILE *f, ir_type type)
{
if (!IR_IS_TYPE_UNSIGNED(type)) {
switch (ir_type_size[type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(uint8_t)");
break;
case 2:
fprintf(f, "(uint16_t)");
break;
case 4:
fprintf(f, "(uint32_t)");
break;
case 8:
fprintf(f, "(uint64_t)");
break;
}
}
}
static void ir_emit_signed_binary_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *op)
{
uint8_t t1 = ctx->ir_base[insn->op1].type;
ir_emit_def_ref(ctx, f, def);
ir_emit_signed_cast(f, t1);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s ", op);
ir_emit_signed_cast(f, t1);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
}
static void ir_emit_unsigned_binary_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *op)
{
uint8_t t1 = ctx->ir_base[insn->op1].type;
ir_emit_def_ref(ctx, f, def);
ir_emit_unsigned_cast(f, t1);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s ", op);
ir_emit_unsigned_cast(f, t1);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
}
static void ir_emit_unsigned_comparison_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *op, const char *fop)
{
uint8_t t1 = ctx->ir_base[insn->op1].type;
IR_ASSERT(t1 == ctx->ir_base[insn->op1].type);
ir_emit_def_ref(ctx, f, def);
if (t1 == IR_FLOAT || t1 == IR_DOUBLE) {
fprintf(f, "!(");
} else {
ir_emit_unsigned_cast(f, t1);
}
ir_emit_ref(ctx, f, insn->op1);
if (t1 == IR_FLOAT || t1 == IR_DOUBLE) {
fprintf(f, " %s ", fop);
} else {
fprintf(f, " %s ", op);
ir_emit_unsigned_cast(f, t1);
}
ir_emit_ref(ctx, f, insn->op2);
if (t1 == IR_FLOAT || t1 == IR_DOUBLE) {
fprintf(f, ")");
}
fprintf(f, ";\n");
}
static void ir_emit_rol_ror(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *op1, const char *op2)
{
uint8_t t1 = ctx->ir_base[insn->op1].type;
ir_emit_def_ref(ctx, f, def);
fprintf(f, "(");
ir_emit_unsigned_cast(f, t1);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s ", op1);
ir_emit_unsigned_cast(f, t1);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ") | (");
ir_emit_unsigned_cast(f, t1);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s (%d", op2, ir_type_size[t1] * 8);
fprintf(f, " - ");
ir_emit_unsigned_cast(f, t1);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, "));\n");
}
static void ir_emit_bswap(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
ir_emit_def_ref(ctx, f, def);
switch (ir_type_size[insn->type]) {
default:
IR_ASSERT(0);
case 4:
fprintf(f, "__builtin_bswap32(");
break;
case 8:
fprintf(f, "__builtin_bswap64(");
break;
}
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ");\n");
}
static void ir_emit_count(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *name)
{
ir_emit_def_ref(ctx, f, def);
fprintf(f, "__builtin_%s%s(", name, ir_type_size[insn->type] == 8 ? "ll" : "");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ");\n");
}
static void ir_emit_sext(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
IR_ASSERT(IR_IS_TYPE_INT(insn->type));
IR_ASSERT(IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type));
IR_ASSERT(ir_type_size[insn->type] > ir_type_size[ctx->ir_base[insn->op1].type]);
ir_emit_def_ref(ctx, f, def);
switch (ir_type_size[insn->type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(int8_t)");
break;
case 2:
fprintf(f, "(int16_t)");
break;
case 4:
fprintf(f, "(int32_t)");
break;
case 8:
fprintf(f, "(int64_t)");
break;
}
switch (ir_type_size[ctx->ir_base[insn->op1].type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(int8_t)");
break;
case 2:
fprintf(f, "(int16_t)");
break;
case 4:
fprintf(f, "(int32_t)");
break;
case 8:
fprintf(f, "(int64_t)");
break;
}
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
}
static void ir_emit_zext(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
IR_ASSERT(IR_IS_TYPE_INT(insn->type));
IR_ASSERT(IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type));
IR_ASSERT(ir_type_size[insn->type] > ir_type_size[ctx->ir_base[insn->op1].type]);
ir_emit_def_ref(ctx, f, def);
switch (ir_type_size[insn->type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(uint8_t)");
break;
case 2:
fprintf(f, "(uint16_t)");
break;
case 4:
fprintf(f, "(uint32_t)");
break;
case 8:
fprintf(f, "(uint64_t)");
break;
}
switch (ir_type_size[ctx->ir_base[insn->op1].type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(uint8_t)");
break;
case 2:
fprintf(f, "(uint16_t)");
break;
case 4:
fprintf(f, "(uint32_t)");
break;
case 8:
fprintf(f, "(uint64_t)");
break;
}
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
}
static void ir_emit_trunc(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
IR_ASSERT(IR_IS_TYPE_INT(insn->type));
IR_ASSERT(IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type));
IR_ASSERT(ir_type_size[insn->type] < ir_type_size[ctx->ir_base[insn->op1].type]);
ir_emit_def_ref(ctx, f, def);
switch (ir_type_size[insn->type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(uint8_t)");
break;
case 2:
fprintf(f, "(uint16_t)");
break;
case 4:
fprintf(f, "(uint32_t)");
break;
case 8:
fprintf(f, "(uint64_t)");
break;
}
switch (ir_type_size[ctx->ir_base[insn->op1].type]) {
default:
IR_ASSERT(0);
case 1:
fprintf(f, "(uint8_t)");
break;
case 2:
fprintf(f, "(uint16_t)");
break;
case 4:
fprintf(f, "(uint32_t)");
break;
case 8:
fprintf(f, "(uint64_t)");
break;
}
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
}
static void ir_emit_bitcast(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
IR_ASSERT(ir_type_size[insn->type] == ir_type_size[ctx->ir_base[insn->op1].type]);
if (IR_IS_TYPE_INT(insn->type)) {
if (IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type)) {
ir_emit_def_ref(ctx, f, def);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
} else if (ctx->ir_base[insn->op1].type == IR_DOUBLE) {
fprintf(f, "\t{union {double d; uint64_t bits;} _u; _u.d = ");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, "; ");
ir_emit_ref(ctx, f, def);
fprintf(f, " = _u.bits;}\n");
} else {
IR_ASSERT(ctx->ir_base[insn->op1].type == IR_FLOAT);
fprintf(f, "\t{union {float f; uint32_t bits;} _u; _u.f = ");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, "; ");
ir_emit_ref(ctx, f, def);
fprintf(f, " = _u.bits;}\n");
}
} else {
IR_ASSERT(IR_IS_TYPE_FP(insn->type));
IR_ASSERT(IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type));
if (insn->type == IR_DOUBLE) {
fprintf(f, "\t{union {double d; uint64_t bits;} _u; _u.bits = ");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, "; ");
ir_emit_ref(ctx, f, def);
fprintf(f, " = _u.d;}\n");
} else {
IR_ASSERT(insn->type == IR_FLOAT);
fprintf(f, "\t{union {float f; uint32_t bits;} _u; _u.bits = ");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, "; ");
ir_emit_ref(ctx, f, def);
fprintf(f, " = _u.f;}\n");
}
}
}
static void ir_emit_conv(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
ir_emit_def_ref(ctx, f, def);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ";\n");
}
static void ir_emit_minmax_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
// fprintf(f, "\td_%d = ", ctx->vregs[def]);
ir_emit_def_ref(ctx, f, def);
ir_emit_ref(ctx, f, insn->op1);
if (insn->op == IR_MIN) {
fprintf(f, " < ");
} else {
IR_ASSERT(insn->op == IR_MAX);
fprintf(f, " > ");
}
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, " ? ");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " : ");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
}
static void ir_emit_conditional_op(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
ir_emit_def_ref(ctx, f, def);
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " ? ");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, " : ");
ir_emit_ref(ctx, f, insn->op3);
fprintf(f, ";\n");
}
static void ir_emit_abs(ir_ctx *ctx, FILE *f, int def, ir_insn *insn)
{
ir_type type = ctx->ir_base[insn->op1].type;
ir_emit_def_ref(ctx, f, def);
if (IR_IS_TYPE_FP(type)) {
if (type == IR_DOUBLE) {
fprintf(f, "fabs(");
} else {
fprintf(f, "fabsf(");
}
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ")\n");
} else {
if (IR_IS_TYPE_SIGNED(type)) {
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " < 0 ? -");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " : ");
ir_emit_ref(ctx, f, insn->op1);
} else {
ir_emit_ref(ctx, f, insn->op1);
}
fprintf(f, ";\n");
}
}
static void ir_emit_overflow_math(ir_ctx *ctx, FILE *f, int def, ir_insn *insn, const char *func, const char *op)
{
ir_type type = insn->type;
ir_use_list *use_list = &ctx->use_lists[def];
ir_ref i, n, *p, overflow = IR_UNUSED;
n = use_list->count;
for (i = 0, p = &ctx->use_edges[use_list->refs]; i < n; i++, p++) {
ir_insn *use_insn = &ctx->ir_base[*p];
if (use_insn->op == IR_OVERFLOW) {
overflow = *p;
break;
}
}
IR_ASSERT(overflow != IR_UNUSED);
if (ir_type_size[type] == 4 || ir_type_size[type] == 8) {
fprintf(f, "\tint overflow_%d;\n", overflow);
ir_emit_def_ref(ctx, f, def);
fprintf(f, "__builtin_%s%s%s_overflow(",
IR_IS_TYPE_SIGNED(type) ? "s" : "u",
func,
ir_type_size[type] == 8 ? "ll" : "");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, ", ");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ", &overflow_%d);\n", overflow);
ir_emit_def_ref(ctx, f, def);
fprintf(f, "overflow_%d;\n", overflow);
} else {
ir_emit_binary_op(ctx, f, def, insn, op);
ir_emit_def_ref(ctx, f, overflow);
if (IR_IS_TYPE_SIGNED(type)) {
fprintf(f, "(int32_t)");
ir_emit_ref(ctx, f, def);
fprintf(f, " != (int32_t)");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s (int32_t)", op);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
} else {
fprintf(f, "(uint32_t)");
ir_emit_ref(ctx, f, def);
fprintf(f, " != (uint32_t)");
ir_emit_ref(ctx, f, insn->op1);
fprintf(f, " %s (uint32_t)", op);
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
}
}
}
static void ir_emit_if(ir_ctx *ctx, FILE *f, uint32_t b, ir_ref def, ir_insn *insn, uint32_t next_block)
{
uint32_t true_block = 0, false_block = 0;
bool short_true = 0, short_false = 0;
ir_get_true_false_blocks(ctx, b, &true_block, &false_block);
if (true_block == next_block) {
short_false = 1;
} else if (false_block == next_block) {
short_true = 1;
}
fprintf(f, "\tif (");
if (short_false) {
fprintf(f, "!");
}
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ")");
if (short_true) {
fprintf(f, " goto bb%d;\n", true_block);
} else if (short_false) {
fprintf(f, " goto bb%d;\n", false_block);
} else {
fprintf(f, " goto bb%d; else goto bb%d;\n", true_block, false_block);
}
}
static void ir_emit_switch(ir_ctx *ctx, FILE *f, uint32_t b, ir_ref def, ir_insn *insn)
{
ir_block *bb;
uint32_t n, *p, use_block;
ir_insn *use_insn;
fprintf(f, "\tswitch (");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ") {\n");
bb = &ctx->cfg_blocks[b];
p = &ctx->cfg_edges[bb->successors];
for (n = bb->successors_count; n != 0; p++, n--) {
use_block = *p;
use_insn = &ctx->ir_base[ctx->cfg_blocks[use_block].start];
if (use_insn->op == IR_CASE_VAL) {
fprintf(f, "\t\tcase ");
ir_emit_ref(ctx, f, use_insn->op2);
fprintf(f, ": goto bb%d;\n", ir_skip_empty_target_blocks(ctx, use_block));
} else {
IR_ASSERT(use_insn->op == IR_CASE_DEFAULT);
fprintf(f, "\t\tdefault: goto bb%d;\n", ir_skip_empty_target_blocks(ctx, use_block));
}
}
fprintf(f, "\t}\n");
}
static void ir_emit_call(ir_ctx *ctx, FILE *f, ir_ref def, ir_insn *insn)
{
int j, n;
if (insn->type != IR_VOID && ctx->vregs[def] != IR_UNUSED) {
ir_emit_def_ref(ctx, f, def);
} else {
fprintf(f, "\t");
}
if (IR_IS_CONST_REF(insn->op2)) {
IR_ASSERT(ctx->ir_base[insn->op2].op == IR_FUNC);
fprintf(f, "%s", ir_get_str(ctx, ctx->ir_base[insn->op2].val.name));
} else {
ir_emit_ref(ctx, f, insn->op2);
}
fprintf(f, "(");
n = insn->inputs_count;
for (j = 3; j <= n; j++) {
if (j != 3) {
fprintf(f, ", ");
}
ir_emit_ref(ctx, f, ir_insn_op(insn, j));
}
fprintf(f, ");\n");
}
static void ir_emit_tailcall(ir_ctx *ctx, FILE *f, ir_insn *insn)
{
int j, n;
if (insn->type != IR_VOID) {
fprintf(f, "\treturn ");
} else {
fprintf(f, "\t");
}
if (IR_IS_CONST_REF(insn->op2)) {
IR_ASSERT(ctx->ir_base[insn->op2].op == IR_FUNC);
fprintf(f, "%s", ir_get_str(ctx, ctx->ir_base[insn->op2].val.name));
} else {
ir_emit_ref(ctx, f, insn->op2);
}
fprintf(f, "(");
n = insn->inputs_count;
for (j = 3; j <= n; j++) {
if (j != 3) {
fprintf(f, ", ");
}
ir_emit_ref(ctx, f, ir_insn_op(insn, j));
}
fprintf(f, ");\n");
if (insn->type == IR_VOID) {
fprintf(f, "\treturn;\n");
}
}
static void ir_emit_ijmp(ir_ctx *ctx, FILE *f, ir_insn *insn)
{
fprintf(f, "\tgoto *(void**)(");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ");\n");
}
static void ir_emit_alloca(ir_ctx *ctx, FILE *f, ir_ref def, ir_insn *insn)
{
ir_emit_def_ref(ctx, f, def);
fprintf(f, "(uintptr_t)alloca(");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ");\n");
}
static void ir_emit_vaddr(ir_ctx *ctx, FILE *f, ir_ref def, ir_insn *insn)
{
ir_insn *var = &ctx->ir_base[insn->op1];
ir_emit_def_ref(ctx, f, def);
fprintf(f, "&");
IR_ASSERT(var->op == IR_VAR/* || var->op == IR_PARAM*/);
fprintf(f, "%s", ir_get_str(ctx, var->op2));
fprintf(f, ";\n");
}
static void ir_emit_vstore(ir_ctx *ctx, FILE *f, ir_insn *insn)
{
if (ctx->use_lists[insn->op3].count != 1) {
ir_insn *var;
IR_ASSERT(insn->op2 > 0);
var = &ctx->ir_base[insn->op2];
IR_ASSERT(var->op == IR_VAR/* || var->op == IR_PARAM*/);
fprintf(f, "\t%s = ", ir_get_str(ctx, var->op2));
ir_emit_ref(ctx, f, insn->op3);
fprintf(f, ";\n");
}
}
static void ir_emit_load(ir_ctx *ctx, FILE *f, ir_ref def, ir_insn *insn)
{
ir_emit_def_ref(ctx, f, def);
fprintf(f, "*((%s*)", ir_type_cname[insn->type]);
if (IR_IS_CONST_REF(insn->op2)) {
ir_insn *const_insn = &ctx->ir_base[insn->op2];
if (const_insn->op == IR_SYM) {
fprintf(f, "&");
}
ir_print_const(ctx, const_insn, f, true);
} else {
fprintf(f, "d_%d", ctx->vregs[insn->op2]);
}
fprintf(f, ");\n");
}
static void ir_emit_store(ir_ctx *ctx, FILE *f, ir_insn *insn)
{
ir_type type = ctx->ir_base[insn->op3].type;
fprintf(f, "\t*((%s*)", ir_type_cname[type]);
if (IR_IS_CONST_REF(insn->op2)) {
if (insn->op == IR_SYM) {
fprintf(f, "&");
}
ir_print_const(ctx, &ctx->ir_base[insn->op2], f, true);
} else {
fprintf(f, "d_%d", ctx->vregs[insn->op2]);
}
fprintf(f, ") = ");
ir_emit_ref(ctx, f, insn->op3);
fprintf(f, ";\n");
}
static int ir_emit_func(ir_ctx *ctx, const char *name, FILE *f)
{
ir_ref i, n, *p;
ir_insn *insn;
ir_use_list *use_list;
bool first;
ir_bitset vars, tmp_types;
uint32_t _b, b, target, prev = 0;
ir_block *bb;
/* Emit function prototype */
if (ctx->flags & IR_STATIC) {
fprintf(f, "static ");
}
fprintf(f, "%s %s%s(", ir_type_cname[ctx->ret_type != (ir_type)-1 ? ctx->ret_type : IR_VOID],
(ctx->flags & IR_FASTCALL_FUNC) ? "__fastcall " : "", name);
use_list = &ctx->use_lists[1];
n = use_list->count;
first = 1;
for (i = 0, p = &ctx->use_edges[use_list->refs]; i < n; i++, p++) {
insn = &ctx->ir_base[*p];
if (insn->op == IR_PARAM) {
if (first) {
first = 0;
} else {
fprintf(f, ", ");
}
fprintf(f, "%s %s", ir_type_cname[insn->type], ir_get_str(ctx, insn->op2));
}
}
if (ctx->flags & IR_VARARG_FUNC) {
if (first) {
first = 0;
} else {
fprintf(f, ", ");
}
fprintf(f, "...");
}
if (first) {
fprintf(f, "void");
}
fprintf(f, ")\n{\n");
if (!ctx->prev_ref) {
ir_build_prev_refs(ctx);
}
/* Emit declarations for local variables */
tmp_types = ir_bitset_malloc(IR_LAST_TYPE);
vars = ir_bitset_malloc(ctx->vregs_count + 1);
for (b = 1, bb = ctx->cfg_blocks + b; b <= ctx->cfg_blocks_count; b++, bb++) {
IR_ASSERT(!(bb->flags & IR_BB_UNREACHABLE));
if (ctx->prev_ref[bb->end] == bb->start
&& bb->successors_count == 1
&& (ctx->ir_base[bb->end].op == IR_END || ctx->ir_base[bb->end].op == IR_LOOP_END)
&& !(bb->flags & (IR_BB_START|IR_BB_ENTRY|IR_BB_DESSA_MOVES))) {
bb->flags |= IR_BB_EMPTY;
}
if (bb->flags & IR_BB_DESSA_MOVES) {
ctx->data = tmp_types;
ir_gen_dessa_moves(ctx, b, ir_add_tmp_type);
}
for (i = bb->start, insn = ctx->ir_base + i; i <= bb->end;) {
if (ctx->vregs[i]) {
if (!ir_bitset_in(vars, ctx->vregs[i])) {
ir_bitset_incl(vars, ctx->vregs[i]);
if (insn->op == IR_PARAM) {
fprintf(f, "\t%s d_%d = %s;\n", ir_type_cname[insn->type], ctx->vregs[i], ir_get_str(ctx, insn->op2));
} else {
ir_use_list *use_list = &ctx->use_lists[i];
if (insn->op == IR_VAR) {
if (use_list->count > 0) {
fprintf(f, "\t%s %s;\n", ir_type_cname[insn->type], ir_get_str(ctx, insn->op2));
} else {
/* skip */
}
} else if ((insn->op == IR_VLOAD)
|| (use_list->count == 1
&& ctx->ir_base[ctx->use_edges[use_list->refs]].op == IR_VSTORE)) {
/* skip, we use variable name instead */
} else {
fprintf(f, "\t%s d_%d;\n", ir_type_cname[insn->type], ctx->vregs[i]);
}
}
} else if (insn->op == IR_PARAM) {
IR_ASSERT(0 && "unexpected PARAM");
return 0;
}
}
n = ir_insn_len(insn);
i += n;
insn += n;
}
}
ir_mem_free(vars);
IR_BITSET_FOREACH(tmp_types, ir_bitset_len(IR_LAST_TYPE), i) {
fprintf(f, "\t%s tmp_%s;\n", ir_type_cname[i], ir_type_tname[i]);
} IR_BITSET_FOREACH_END();
ir_mem_free(tmp_types);
for (_b = 1; _b <= ctx->cfg_blocks_count; _b++) {
if (ctx->cfg_schedule) {
b = ctx->cfg_schedule[_b];
} else {
b = _b;
}
bb = &ctx->cfg_blocks[b];
IR_ASSERT(!(bb->flags & IR_BB_UNREACHABLE));
if ((bb->flags & (IR_BB_START|IR_BB_ENTRY|IR_BB_EMPTY)) == IR_BB_EMPTY) {
continue;
}
if (bb->predecessors_count > 1
|| (bb->predecessors_count == 1 && ctx->cfg_edges[bb->predecessors] != prev)
|| ctx->ir_base[bb->start].op == IR_CASE_VAL
|| ctx->ir_base[bb->start].op == IR_CASE_DEFAULT) {
fprintf(f, "bb%d:\n", b);
}
prev = b;
for (i = bb->start, insn = ctx->ir_base + i; i <= bb->end;) {
switch (insn->op) {
case IR_START:
case IR_BEGIN:
case IR_IF_TRUE:
case IR_IF_FALSE:
case IR_CASE_VAL:
case IR_CASE_DEFAULT:
case IR_MERGE:
case IR_LOOP_BEGIN:
case IR_UNREACHABLE:
case IR_PARAM:
case IR_VAR:
case IR_PHI:
case IR_PI:
case IR_VLOAD:
/* skip */
break;
case IR_EQ:
ir_emit_binary_op(ctx, f, i, insn, "==");
break;
case IR_NE:
ir_emit_binary_op(ctx, f, i, insn, "!=");
break;
case IR_LT:
ir_emit_binary_op(ctx, f, i, insn, "<");
break;
case IR_GE:
ir_emit_binary_op(ctx, f, i, insn, ">=");
break;
case IR_LE:
ir_emit_binary_op(ctx, f, i, insn, "<=");
break;
case IR_GT:
ir_emit_binary_op(ctx, f, i, insn, ">");
break;
case IR_ULT:
ir_emit_unsigned_comparison_op(ctx, f, i, insn, "<", ">=");
break;
case IR_UGE:
ir_emit_unsigned_comparison_op(ctx, f, i, insn, ">=", "<");
break;
case IR_ULE:
ir_emit_unsigned_comparison_op(ctx, f, i, insn, "<=", ">");
break;
case IR_UGT:
ir_emit_unsigned_comparison_op(ctx, f, i, insn, ">", "<=");
break;
case IR_ADD:
ir_emit_binary_op(ctx, f, i, insn, "+");
break;
case IR_SUB:
ir_emit_binary_op(ctx, f, i, insn, "-");
break;
case IR_MUL:
ir_emit_binary_op(ctx, f, i, insn, "*");
break;
case IR_DIV:
ir_emit_binary_op(ctx, f, i, insn, "/");
break;
case IR_MOD:
ir_emit_binary_op(ctx, f, i, insn, "%");
break;
case IR_NEG:
ir_emit_unary_op(ctx, f, i, insn, "-");
break;
case IR_NOT:
ir_emit_unary_op(ctx, f, i, insn, insn->type == IR_BOOL ? "!" : "~");
break;
case IR_OR:
ir_emit_binary_op(ctx, f, i, insn, insn->type == IR_BOOL ? "||" : "|");
break;
case IR_AND:
ir_emit_binary_op(ctx, f, i, insn, insn->type == IR_BOOL ? "&&" : "&");
break;
case IR_XOR:
ir_emit_binary_op(ctx, f, i, insn, "^");
break;
case IR_MIN:
case IR_MAX:
ir_emit_minmax_op(ctx, f, i, insn);
break;
case IR_COND:
ir_emit_conditional_op(ctx, f, i, insn);
break;
case IR_ABS:
ir_emit_abs(ctx, f, i, insn);
break;
case IR_SHL:
ir_emit_binary_op(ctx, f, i, insn, "<<");
break;
case IR_SHR:
ir_emit_unsigned_binary_op(ctx, f, i, insn, ">>");
break;
case IR_SAR:
ir_emit_signed_binary_op(ctx, f, i, insn, ">>");
break;
case IR_ROL:
ir_emit_rol_ror(ctx, f, i, insn, "<<", ">>");
break;
case IR_ROR:
ir_emit_rol_ror(ctx, f, i, insn, ">>", "<<");
break;
case IR_BSWAP:
ir_emit_bswap(ctx, f, i, insn);
break;
case IR_CTPOP:
ir_emit_count(ctx, f, i, insn, "popcount");
break;
case IR_CTLZ:
ir_emit_count(ctx, f, i, insn, "clz");
break;
case IR_CTTZ:
ir_emit_count(ctx, f, i, insn, "ctz");
break;
case IR_SEXT:
ir_emit_sext(ctx, f, i, insn);
break;
case IR_ZEXT:
ir_emit_zext(ctx, f, i, insn);
break;
case IR_TRUNC:
ir_emit_trunc(ctx, f, i, insn);
break;
case IR_BITCAST:
case IR_PROTO:
ir_emit_bitcast(ctx, f, i, insn);
break;
case IR_INT2FP:
case IR_FP2INT:
case IR_FP2FP:
ir_emit_conv(ctx, f, i, insn);
break;
case IR_ADD_OV:
ir_emit_overflow_math(ctx, f, i, insn, "add", "+");
break;
case IR_SUB_OV:
ir_emit_overflow_math(ctx, f, i, insn, "sub", "-");
break;
case IR_MUL_OV:
ir_emit_overflow_math(ctx, f, i, insn, "mul", "*");
break;
case IR_OVERFLOW:
break;
case IR_COPY:
ir_emit_copy(ctx, f, i, insn);
break;
case IR_RETURN:
IR_ASSERT(bb->successors_count == 0);
fprintf(f, "\treturn");
if (!insn->op2) {
fprintf(f, ";\n");
} else {
fprintf(f, " ");
ir_emit_ref(ctx, f, insn->op2);
fprintf(f, ";\n");
}
break;
case IR_END:
case IR_LOOP_END:
IR_ASSERT(bb->successors_count == 1);