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ir_aarch64.dasc
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/*
* IR - Lightweight JIT Compilation Framework
* (Aarch64 native code generator based on DynAsm)
* Copyright (C) 2022 Zend by Perforce.
* Authors: Dmitry Stogov <[email protected]>
*/
|.arch arm64
|.actionlist dasm_actions
|.globals ir_lb
|.section code, cold_code, rodata, jmp_table
|.define IR_LOOP_ALIGNMENT, 8
#ifdef IR_DEBUG
typedef struct _ir_mem {uint64_t v;} ir_mem;
# define IR_MEM_VAL(loc) ((loc).v)
#else
typedef uint64_t ir_mem;
# define IR_MEM_VAL(loc) (loc)
#endif
#define IR_MEM_OFFSET(loc) ((int32_t)(IR_MEM_VAL(loc) & 0xffffffff))
#define IR_MEM_BASE(loc) ((ir_reg)((IR_MEM_VAL(loc) >> 32) & 0xff))
#define IR_MEM_INDEX(loc) ((ir_reg)((IR_MEM_VAL(loc) >> 40) & 0xff))
#define IR_MEM_SHIFT(loc) ((int32_t)((IR_MEM_VAL(loc) >> 48) & 0xff))
#define IR_MEM_O(addr) IR_MEM(IR_REG_NONE, addr, IR_REG_NONE, 0)
#define IR_MEM_B(base) IR_MEM(base, 0, IR_REG_NONE, 0)
#define IR_MEM_BO(base, offset) IR_MEM(base, offset, IR_REG_NONE, 0)
IR_ALWAYS_INLINE ir_mem IR_MEM(ir_reg base, int32_t offset, ir_reg index, int32_t shift)
{
ir_mem mem;
IR_ASSERT(base == IR_REG_NONE || (base >= IR_REG_GP_FIRST && base <= IR_REG_GP_LAST));
IR_ASSERT(index == IR_REG_NONE || (index >= IR_REG_GP_FIRST && index <= IR_REG_GP_LAST));
IR_ASSERT(index == IR_REG_NONE || offset == 0);
IR_ASSERT(shift == 0); // TODO: ???
#ifdef IR_DEBUG
mem.v =
#else
mem =
#endif
((uint64_t)(uint32_t)offset |
((uint64_t)(uint8_t)base << 32) |
((uint64_t)(uint8_t)index << 40) |
((uint64_t)(uint8_t)shift << 48));
return mem;
}
#define IR_SPILL_POS_TO_OFFSET(offset) \
((ctx->flags & IR_USE_FRAME_POINTER) ? \
((offset) + (int32_t)sizeof(void*) * 2) : \
((offset) + ctx->call_stack_size))
#define B_IMM (1<<27) // signed imm26 * 4
#define ADR_IMM (1<<20) // signed imm21
#define ADRP_IMM (1LL<<32) // signed imm21 * 4096
static bool aarch64_may_use_b(ir_code_buffer *code_buffer, const void *addr)
{
if (code_buffer) {
if (addr >= code_buffer->start && (char*)addr < (char*)code_buffer->end) {
return (((char*)code_buffer->end - (char*)code_buffer->start) < B_IMM);
} else if ((char*)addr >= (char*)code_buffer->end) {
return (((char*)addr - (char*)code_buffer->start) < B_IMM);
} else if (addr < code_buffer->start) {
return (((char*)code_buffer->end - (char*)addr) < B_IMM);
}
}
return 0;
}
#if 0
static bool aarch64_may_use_adr(ir_code_buffer *code_buffer, const void *addr)
{
if (code_buffer) {
if (addr >= code_buffer->start && (char*)addr < (char*)code_buffer->end) {
return (((char*)code_buffer->end - (char*)code_buffer->start) < ADR_IMM);
} else if ((char*)addr >= (char*)code_buffer->end) {
return (((char*)addr - (char*)code_buffer->start) < ADR_IMM);
} else if (addr < code_buffer->start) {
return (((char*)code_buffer->end - (char*)addr) < ADR_IMM);
}
}
return 0;
}
static bool aarch64_may_use_adrp(ir_code_buffer *code_buffer, const void *addr)
{
if (code_buffer) {
if (addr >= code_buffer->start && (char*)addr < (char*)code_buffer->end) {
return (((char*)code_buffer->end - (char*)code_buffer->start) < ADRP_IMM);
} else if ((char*)addr >= (char*)code_buffer->end) {
return (((char*)addr - (char*)code_buffer->start) < ADRP_IMM);
} else if (addr < code_buffer->start) {
return (((char*)code_buffer->end - (char*)addr) < ADRP_IMM);
}
}
return 0;
}
#endif
/* Determine whether "val" falls into two allowed ranges:
* Range 1: [0, 0xfff]
* Range 2: LSL #12 to Range 1
* Used to guard the immediate encoding for add/adds/sub/subs/cmp/cmn instructions. */
static bool aarch64_may_encode_imm12(const int64_t val)
{
return (val >= 0 && (val <= 0xfff || !(val & 0xffffffffff000fff)));
}
/* Determine whether an immediate value can be encoded as the immediate operand of logical instructions. */
static bool aarch64_may_encode_logical_imm(uint64_t value, uint32_t type_size)
{
/* fast path: power of two */
if (value > 0 && !(value & (value - 1))) {
return 1;
}
if (type_size == 8) {
if (dasm_imm13((uint32_t)value, (uint32_t)(value >> 32)) != -1) {
return 1;
}
} else {
if (dasm_imm13((uint32_t)value, (uint32_t)value) != -1) {
return 1;
}
}
return 0;
}
static bool aarch64_may_encode_imm7_addr_offset(const int64_t offset, uint32_t type_size)
{
return (uintptr_t)(offset) % type_size == 0
&& offset < 63 * (int32_t)type_size
&& offset >= -64 * (int32_t)type_size;
}
static bool aarch64_may_encode_addr_offset(int64_t offset, uint32_t type_size)
{
return (uintptr_t)(offset) % type_size == 0 && (uintptr_t)(offset) < 0xfff * type_size;
}
|.macro ASM_REG_REG_OP, op, type, dst, src
|| if (ir_type_size[type] == 8) {
| op Rx(dst), Rx(src)
|| } else {
| op Rw(dst), Rw(src)
|| }
|.endmacro
|.macro ASM_REG_REG_REG_OP, op, type, dst, src1, src2
|| if (ir_type_size[type] == 8) {
| op Rx(dst), Rx(src1), Rx(src2)
|| } else {
| op Rw(dst), Rw(src1), Rw(src2)
|| }
|.endmacro
|.macro ASM_REG_REG_REG_TXT_OP, op, type, dst, src1, src2, txt
|| if (ir_type_size[type] == 8) {
| op Rx(dst), Rx(src1), Rx(src2), txt
|| } else {
| op Rw(dst), Rw(src1), Rw(src2), txt
|| }
|.endmacro
|.macro ASM_REG_REG_REG_REG_OP, op, type, dst, src1, src2, src3
|| if (ir_type_size[type] == 8) {
| op Rx(dst), Rx(src1), Rx(src2), Rx(src3)
|| } else {
| op Rw(dst), Rw(src1), Rw(src2), Rw(src3);
|| }
|.endmacro
|.macro ASM_REG_REG_IMM_OP, op, type, dst, src1, val
|| if (ir_type_size[type] == 8) {
| op Rx(dst), Rx(src1), #val
|| } else {
| op Rw(dst), Rw(src1), #val
|| }
|.endmacro
|.macro ASM_REG_IMM_OP, op, type, reg, val
|| if (ir_type_size[type] == 8) {
| op Rx(reg), #val
|| } else {
| op Rw(reg), #val
|| }
|.endmacro
|.macro ASM_FP_REG_IMM_OP, op, type, reg, val
|| if (type == IR_DOUBLE) {
| op Rd(reg-IR_REG_FP_FIRST), #val
|| } else {
|| IR_ASSERT(type == IR_FLOAT);
| op Rs(reg-IR_REG_FP_FIRST), #val
|| }
|.endmacro
|.macro ASM_FP_REG_REG_REG_OP, op, type, dst, src1, src2
|| if (type == IR_DOUBLE) {
| op Rd(dst-IR_REG_FP_FIRST), Rd(src1-IR_REG_FP_FIRST), Rd(src2-IR_REG_FP_FIRST)
|| } else {
|| IR_ASSERT(type == IR_FLOAT);
| op Rs(dst-IR_REG_FP_FIRST), Rs(src1-IR_REG_FP_FIRST), Rs(src2-IR_REG_FP_FIRST)
|| }
|.endmacro
typedef struct _ir_backend_data {
ir_reg_alloc_data ra_data;
uint32_t dessa_from_block;
dasm_State *dasm_state;
ir_bitset emit_constants;
int rodata_label, jmp_table_label;
} ir_backend_data;
#define IR_GP_REG_NAME(code, name64, name32) \
#name64,
#define IR_GP_REG_NAME32(code, name64, name32) \
#name32,
#define IR_FP_REG_NAME(code, name64, name32, name16, name8) \
#name64,
#define IR_FP_REG_NAME32(code, name64, name32, name16, name8) \
#name32,
static const char *_ir_reg_name[IR_REG_NUM] = {
IR_GP_REGS(IR_GP_REG_NAME)
IR_FP_REGS(IR_FP_REG_NAME)
};
static const char *_ir_reg_name32[IR_REG_NUM] = {
IR_GP_REGS(IR_GP_REG_NAME32)
IR_FP_REGS(IR_FP_REG_NAME32)
};
/* Calling Convention */
static const int8_t _ir_int_reg_params[IR_REG_INT_ARGS] = {
IR_REG_INT_ARG1,
IR_REG_INT_ARG2,
IR_REG_INT_ARG3,
IR_REG_INT_ARG4,
IR_REG_INT_ARG5,
IR_REG_INT_ARG6,
IR_REG_INT_ARG7,
IR_REG_INT_ARG8,
};
static const int8_t _ir_fp_reg_params[IR_REG_FP_ARGS] = {
IR_REG_FP_ARG1,
IR_REG_FP_ARG2,
IR_REG_FP_ARG3,
IR_REG_FP_ARG4,
IR_REG_FP_ARG5,
IR_REG_FP_ARG6,
IR_REG_FP_ARG7,
IR_REG_FP_ARG8,
};
const char *ir_reg_name(int8_t reg, ir_type type)
{
if (reg >= IR_REG_NUM) {
if (reg == IR_REG_SCRATCH) {
return "SCRATCH";
} else {
IR_ASSERT(reg == IR_REG_ALL);
return "ALL";
}
}
IR_ASSERT(reg >= 0 && reg < IR_REG_NUM);
if (type == IR_VOID) {
type = (reg < IR_REG_FP_FIRST) ? IR_ADDR : IR_DOUBLE;
}
if (ir_type_size[type] == 8) {
return _ir_reg_name[reg];
} else {
return _ir_reg_name32[reg];
}
}
#define IR_RULES(_) \
_(CMP_INT) \
_(CMP_FP) \
_(MUL_PWR2) \
_(DIV_PWR2) \
_(MOD_PWR2) \
_(SDIV_PWR2) \
_(SMOD_PWR2) \
_(OP_INT) \
_(OP_FP) \
_(BINOP_INT) \
_(BINOP_FP) \
_(SHIFT) \
_(SHIFT_CONST) \
_(COPY_INT) \
_(COPY_FP) \
_(CMP_AND_BRANCH_INT) \
_(CMP_AND_BRANCH_FP) \
_(GUARD_CMP_INT) \
_(GUARD_CMP_FP) \
_(GUARD_OVERFLOW) \
_(OVERFLOW_AND_BRANCH) \
_(MIN_MAX_INT) \
_(REG_BINOP_INT) \
_(LOAD_INT) \
_(LOAD_FP) \
_(STORE_INT) \
_(STORE_FP) \
_(IF_INT) \
_(RETURN_VOID) \
_(RETURN_INT) \
_(RETURN_FP) \
#define IR_RULE_ENUM(name) IR_ ## name,
#define IR_STATIC_ALLOCA (IR_SKIPPED | IR_FUSED | IR_SIMPLE | IR_ALLOCA)
enum _ir_rule {
IR_FIRST_RULE = IR_LAST_OP,
IR_RULES(IR_RULE_ENUM)
IR_LAST_RULE
};
#define IR_RULE_NAME(name) #name,
const char *ir_rule_name[IR_LAST_OP] = {
NULL,
IR_RULES(IR_RULE_NAME)
NULL
};
/* register allocation */
int ir_get_target_constraints(ir_ctx *ctx, ir_ref ref, ir_target_constraints *constraints)
{
uint32_t rule = ir_rule(ctx, ref);
const ir_insn *insn;
int n = 0;
int flags = IR_USE_MUST_BE_IN_REG | IR_OP1_MUST_BE_IN_REG | IR_OP2_MUST_BE_IN_REG | IR_OP3_MUST_BE_IN_REG;
constraints->def_reg = IR_REG_NONE;
constraints->hints_count = 0;
switch (rule & IR_RULE_MASK) {
case IR_BINOP_INT:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
} else if (ir_rule(ctx, insn->op1) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[n] = IR_TMP_REG(1, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op2) && insn->op1 != insn->op2) {
const ir_insn *val_insn = &ctx->ir_base[insn->op2];
switch (insn->op) {
case IR_ADD:
case IR_ADD_OV:
case IR_SUB:
case IR_SUB_OV:
if (IR_IS_SYM_CONST(val_insn->op) || !aarch64_may_encode_imm12(val_insn->val.u64)) {
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_MUL_OV:
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_SAVE_SUB_REF);
n++;
break;
case IR_AND:
case IR_OR:
case IR_XOR:
if (IR_IS_SYM_CONST(val_insn->op) || !aarch64_may_encode_logical_imm(val_insn->val.u64, ir_type_size[insn->type])) {
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_MUL:
case IR_DIV:
case IR_MOD:
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
break;
}
} else if (ir_rule(ctx, insn->op2) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[n] = IR_TMP_REG(2, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (insn->op == IR_MOD) {
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
} else if (insn->op == IR_MUL_OV && (ir_type_size[insn->type] == 8 || IR_IS_TYPE_SIGNED(insn->type))) {
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_SAVE_SUB_REF);
n++;
}
break;
case IR_MUL_PWR2:
case IR_DIV_PWR2:
case IR_MOD_PWR2:
case IR_SHIFT:
case IR_SHIFT_CONST:
case IR_OP_INT:
case IR_OP_FP:
case IR_INT2FP:
case IR_FP2INT:
case IR_FP2FP:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (rule == IR_SHIFT_CONST
&& (insn->op == IR_ROL || insn->op == IR_ROR)
&& ir_type_size[insn->type] < 4) {
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
} else if (rule == IR_SHIFT
&& (insn->op == IR_ROL || insn->op == IR_ROR)
&& ir_type_size[insn->type] < 4) {
if (insn->op == IR_ROL) {
flags |= IR_DEF_CONFLICTS_WITH_INPUT_REGS;
}
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_SAVE_SUB_REF);
n++;
} else if (rule == IR_SHIFT && insn->op == IR_ROL) {
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_SDIV_PWR2:
flags = IR_DEF_CONFLICTS_WITH_INPUT_REGS | IR_USE_MUST_BE_IN_REG | IR_OP1_MUST_BE_IN_REG;
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op2)) {
int64_t offset = ctx->ir_base[insn->op2].val.u64 - 1;
if (!aarch64_may_encode_imm12(offset)) {
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
}
break;
case IR_SMOD_PWR2:
flags = IR_USE_MUST_BE_IN_REG | IR_OP1_SHOULD_BE_IN_REG;
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_USE_SUB_REF, IR_SAVE_SUB_REF);
n++;
break;
case IR_CTPOP:
flags = IR_USE_MUST_BE_IN_REG | IR_OP1_MUST_BE_IN_REG;
insn = &ctx->ir_base[ref];
constraints->tmp_regs[0] = IR_TMP_REG(2, IR_DOUBLE, IR_USE_SUB_REF, IR_SAVE_SUB_REF);
n = 1;
break;
case IR_BINOP_FP:
case IR_MIN_MAX_INT:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op2) && insn->op1 != insn->op2) {
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_CMP_INT:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
} else if (ir_rule(ctx, insn->op1) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[0] = IR_TMP_REG(1, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n = 1;
}
if (IR_IS_CONST_REF(insn->op2) && insn->op1 != insn->op2) {
insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(insn->op) || !aarch64_may_encode_imm12(insn->val.u64)) {
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
} else if (ir_rule(ctx, insn->op2) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[n] = IR_TMP_REG(2, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_CMP_FP:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
const ir_insn *val_insn = &ctx->ir_base[insn->op1];
constraints->tmp_regs[n] = IR_TMP_REG(1, val_insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op2) && insn->op1 != insn->op2) {
const ir_insn *val_insn = &ctx->ir_base[insn->op2];
constraints->tmp_regs[n] = IR_TMP_REG(2, val_insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_VSTORE:
insn = &ctx->ir_base[ref];
if (IR_IS_CONST_REF(insn->op3)) {
insn = &ctx->ir_base[insn->op3];
constraints->tmp_regs[0] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n = 1;
} else if (ir_rule(ctx, insn->op3) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[0] = IR_TMP_REG(3, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n = 1;
}
break;
case IR_LOAD_FP:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op2)) {
IR_ASSERT(ctx->ir_base[insn->op2].type == IR_ADDR);
constraints->tmp_regs[n] = IR_TMP_REG(2, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_STORE_INT:
case IR_STORE_FP:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op2)) {
IR_ASSERT(ctx->ir_base[insn->op2].type == IR_ADDR);
constraints->tmp_regs[n] = IR_TMP_REG(2, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op3)) {
insn = &ctx->ir_base[insn->op3];
if (!IR_IS_TYPE_INT(insn->type) || IR_IS_SYM_CONST(insn->op) || insn->val.i64 != 0) {
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
} else if (ir_rule(ctx, insn->op3) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[n] = IR_TMP_REG(3, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_SWITCH:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op2)) {
insn = &ctx->ir_base[insn->op2];
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
} else {
insn = &ctx->ir_base[insn->op2];
constraints->tmp_regs[n] = IR_TMP_REG(1, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
constraints->tmp_regs[n] = IR_TMP_REG(3, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
break;
case IR_CALL:
insn = &ctx->ir_base[ref];
constraints->def_reg = (IR_IS_TYPE_INT(insn->type)) ? IR_REG_INT_RET1 : IR_REG_FP_RET1;
constraints->tmp_regs[0] = IR_SCRATCH_REG(IR_REG_SCRATCH, IR_USE_SUB_REF, IR_DEF_SUB_REF);
n = 1;
IR_FALLTHROUGH;
case IR_TAILCALL:
insn = &ctx->ir_base[ref];
if (insn->inputs_count > 2) {
constraints->hints[2] = IR_REG_NONE;
constraints->hints_count = ir_get_args_regs(ctx, insn, constraints->hints);
if (!IR_IS_CONST_REF(insn->op2)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, IR_ADDR, IR_LOAD_SUB_REF, IR_USE_SUB_REF);
n++;
}
}
flags = IR_USE_SHOULD_BE_IN_REG | IR_OP2_MUST_BE_IN_REG | IR_OP3_SHOULD_BE_IN_REG;
break;
case IR_COND:
insn = &ctx->ir_base[ref];
n = 0;
if (IR_IS_CONST_REF(insn->op1)) {
constraints->tmp_regs[n] = IR_TMP_REG(1, ctx->ir_base[insn->op1].type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op2) || ir_rule(ctx, insn->op2) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[n] = IR_TMP_REG(2, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
if (IR_IS_CONST_REF(insn->op3) || ir_rule(ctx, insn->op3) == IR_STATIC_ALLOCA) {
constraints->tmp_regs[n] = IR_TMP_REG(3, insn->type, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n++;
}
break;
case IR_COPY_INT:
case IR_COPY_FP:
case IR_TRUNC:
case IR_BITCAST:
case IR_PROTO:
flags = IR_USE_MUST_BE_IN_REG | IR_OP1_SHOULD_BE_IN_REG;
break;
case IR_ZEXT:
case IR_SEXT:
flags = IR_DEF_REUSES_OP1_REG | IR_USE_MUST_BE_IN_REG;
break;
case IR_PARAM:
constraints->def_reg = ir_get_param_reg(ctx, ref);
flags = 0;
break;
case IR_PI:
case IR_PHI:
flags = IR_USE_SHOULD_BE_IN_REG;
break;
case IR_RLOAD:
constraints->def_reg = ctx->ir_base[ref].op2;
flags = IR_USE_SHOULD_BE_IN_REG;
break;
case IR_EXITCALL:
constraints->def_reg = IR_REG_INT_RET1;
break;
case IR_RSTORE:
flags = IR_OP3_SHOULD_BE_IN_REG;
break;
case IR_RETURN_INT:
flags = IR_OP2_SHOULD_BE_IN_REG;
constraints->hints[2] = IR_REG_INT_RET1;
constraints->hints_count = 3;
break;
case IR_RETURN_FP:
flags = IR_OP2_SHOULD_BE_IN_REG;
constraints->hints[2] = IR_REG_FP_RET1;
constraints->hints_count = 3;
break;
case IR_SNAPSHOT:
flags = 0;
break;
case IR_VA_START:
flags = IR_OP2_MUST_BE_IN_REG;
constraints->tmp_regs[0] = IR_TMP_REG(3, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n = 1;
break;
case IR_VA_ARG:
flags = IR_USE_MUST_BE_IN_REG | IR_OP2_MUST_BE_IN_REG;
constraints->tmp_regs[0] = IR_TMP_REG(3, IR_ADDR, IR_LOAD_SUB_REF, IR_SAVE_SUB_REF);
n = 1;
break;
case IR_VA_COPY:
flags = IR_OP2_MUST_BE_IN_REG | IR_OP3_MUST_BE_IN_REG;
constraints->tmp_regs[0] = IR_TMP_REG(1, IR_ADDR, IR_LOAD_SUB_REF, IR_DEF_SUB_REF);
n = 1;
break;
}
constraints->tmps_count = n;
return flags;
}
/* instruction selection */
static void ir_match_fuse_addr(ir_ctx *ctx, ir_ref addr_ref, ir_type type)
{
if (!IR_IS_CONST_REF(addr_ref)) {
ir_insn *addr_insn = &ctx->ir_base[addr_ref];
if (addr_insn->op == IR_ADD
&& !IR_IS_CONST_REF(addr_insn->op1)
&& IR_IS_CONST_REF(addr_insn->op2) // TODO: temporary workaround
&& !IR_IS_SYM_CONST(ctx->ir_base[addr_insn->op2].op)
&& aarch64_may_encode_addr_offset(ctx->ir_base[addr_insn->op2].val.i64, ir_type_size[type])) {
ir_use_list *use_list = &ctx->use_lists[addr_ref];
ir_ref j = use_list->count;
if (j > 1) {
/* check if address is used only in LOAD and STORE */
ir_ref *p = &ctx->use_edges[use_list->refs];
do {
ir_insn *insn = &ctx->ir_base[*p];
if (insn->op != IR_LOAD && (insn->op != IR_STORE || insn->op3 == addr_ref)) {
return;
}
p++;
} while (--j);
}
ctx->rules[addr_ref] = IR_FUSED | IR_SIMPLE | addr_insn->op;
}
}
}
static uint32_t ir_match_insn(ir_ctx *ctx, ir_ref ref)
{
ir_insn *op2_insn;
ir_insn *insn = &ctx->ir_base[ref];
switch (insn->op) {
case IR_EQ:
case IR_NE:
case IR_LT:
case IR_GE:
case IR_LE:
case IR_GT:
case IR_ULT:
case IR_UGE:
case IR_ULE:
case IR_UGT:
if (IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type)) {
return IR_CMP_INT;
} else {
return IR_CMP_FP;
}
break;
case IR_ADD:
case IR_SUB:
if (IR_IS_TYPE_INT(insn->type)) {
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.i64 == 0) {
// return IR_COPY_INT;
}
}
binop_int:
return IR_BINOP_INT;
} else {
binop_fp:
return IR_BINOP_FP;
}
break;
case IR_MUL:
if (IR_IS_TYPE_INT(insn->type)) {
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.u64 == 0) {
// 0
} else if (op2_insn->val.u64 == 1) {
// return IR_COPY_INT;
} else if (IR_IS_POWER_OF_TWO(op2_insn->val.u64)) {
return IR_MUL_PWR2;
}
}
return IR_BINOP_INT;
} else {
goto binop_fp;
}
break;
case IR_ADD_OV:
case IR_SUB_OV:
IR_ASSERT(IR_IS_TYPE_INT(insn->type));
goto binop_int;
case IR_MUL_OV:
IR_ASSERT(IR_IS_TYPE_INT(insn->type));
goto binop_int;
case IR_DIV:
if (IR_IS_TYPE_INT(insn->type)) {
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.u64 == 1) {
// return IR_COPY_INT;
} else if (IR_IS_POWER_OF_TWO(op2_insn->val.u64)) {
if (IR_IS_TYPE_UNSIGNED(insn->type)) {
return IR_DIV_PWR2;
} else {
return IR_SDIV_PWR2;
}
}
}
return IR_BINOP_INT;
} else {
goto binop_fp;
}
break;
case IR_MOD:
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (IR_IS_POWER_OF_TWO(op2_insn->val.u64)) {
if (IR_IS_TYPE_UNSIGNED(insn->type)) {
return IR_MOD_PWR2;
} else {
return IR_SMOD_PWR2;
}
}
}
return IR_BINOP_INT;
case IR_BSWAP:
case IR_NOT:
case IR_CTLZ:
case IR_CTTZ:
IR_ASSERT(IR_IS_TYPE_INT(insn->type));
return IR_OP_INT;
case IR_NEG:
case IR_ABS:
if (IR_IS_TYPE_INT(insn->type)) {
return IR_OP_INT;
} else {
return IR_OP_FP;
}
case IR_OR:
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.i64 == 0) {
// return IR_COPY_INT;
} else if (op2_insn->val.i64 == -1) {
// -1
}
}
goto binop_int;
case IR_AND:
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.i64 == 0) {
// 0
} else if (op2_insn->val.i64 == -1) {
// return IR_COPY_INT;
}
}
goto binop_int;
case IR_XOR:
if ((ctx->flags & IR_OPT_CODEGEN) && IR_IS_CONST_REF(insn->op2)) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
}
}
goto binop_int;
case IR_SHL:
if (IR_IS_CONST_REF(insn->op2)) {
if (ctx->flags & IR_OPT_CODEGEN) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.u64 == 0) {
// return IR_COPY_INT;
} else if (ir_type_size[insn->type] >= 4) {
if (op2_insn->val.u64 == 1) {
// lea [op1*2]
} else if (op2_insn->val.u64 == 2) {
// lea [op1*4]
} else if (op2_insn->val.u64 == 3) {
// lea [op1*8]
}
}
}
return IR_SHIFT_CONST;
}
return IR_SHIFT;
case IR_SHR:
case IR_SAR:
case IR_ROL:
case IR_ROR:
if (IR_IS_CONST_REF(insn->op2)) {
if (ctx->flags & IR_OPT_CODEGEN) {
op2_insn = &ctx->ir_base[insn->op2];
if (IR_IS_SYM_CONST(op2_insn->op)) {
/* pass */
} else if (IR_IS_CONST_REF(insn->op1)) {
// const
} else if (op2_insn->val.u64 == 0) {
// return IR_COPY_INT;
}
}
return IR_SHIFT_CONST;
}
return IR_SHIFT;
case IR_MIN:
case IR_MAX:
if (IR_IS_TYPE_INT(insn->type)) {
return IR_MIN_MAX_INT;
} else {
goto binop_fp;
}
break;
// case IR_COND:
case IR_COPY:
if (IR_IS_TYPE_INT(insn->type)) {
return IR_COPY_INT | IR_MAY_REUSE;
} else {
return IR_COPY_FP | IR_MAY_REUSE;
}
break;
// case IR_TRUNC:
case IR_PROTO:
return insn->op | IR_MAY_REUSE;
case IR_BITCAST:
if (IR_IS_TYPE_INT(insn->type) && IR_IS_TYPE_INT(ctx->ir_base[insn->op1].type)) {
return insn->op | IR_MAY_REUSE;
} else {
return insn->op;
}
case IR_CALL:
if (ctx->flags & IR_FUNCTION) {
ctx->flags |= IR_USE_FRAME_POINTER;
}
ctx->flags2 |= IR_HAS_CALLS;
return IR_CALL;
case IR_VAR:
return IR_SKIPPED | IR_VAR;
case IR_PARAM:
return ctx->use_lists[ref].count > 0 ? IR_PARAM : IR_SKIPPED | IR_PARAM;
case IR_ALLOCA:
if (ctx->flags & IR_FUNCTION) {
if (IR_IS_CONST_REF(insn->op2) && ctx->cfg_map[ref] == 1) {
ir_insn *val = &ctx->ir_base[insn->op2];
if (!IR_IS_SYM_CONST(val->op)) {
return IR_STATIC_ALLOCA;
}
}
ctx->flags |= IR_USE_FRAME_POINTER;
ctx->flags2 |= IR_HAS_ALLOCA;
}
return IR_ALLOCA;
case IR_LOAD:
ir_match_fuse_addr(ctx, insn->op2, insn->type);
if (IR_IS_TYPE_INT(insn->type)) {
return IR_LOAD_INT;
} else {
return IR_LOAD_FP;
}
break;
case IR_STORE:
ir_match_fuse_addr(ctx, insn->op2, ctx->ir_base[insn->op3].type);
if (IR_IS_TYPE_INT(ctx->ir_base[insn->op3].type)) {
return IR_STORE_INT;
} else {
return IR_STORE_FP;
}
break;
case IR_RLOAD:
if (IR_REGSET_IN(IR_REGSET_UNION((ir_regset)ctx->fixed_regset, IR_REGSET_FIXED), insn->op2)) {
return IR_SKIPPED | IR_RLOAD;
}
return IR_RLOAD;
case IR_RSTORE:
if (IR_IS_TYPE_INT(ctx->ir_base[insn->op2].type)) {
if ((ctx->flags & IR_OPT_CODEGEN) && ir_in_same_block(ctx, insn->op2) && ctx->use_lists[insn->op2].count == 1) {
ir_insn *op_insn = &ctx->ir_base[insn->op2];
if (!ctx->rules[insn->op2]) {
ctx->rules[insn->op2] = ir_match_insn(ctx, insn->op2);
}
if (ctx->rules[insn->op2] == IR_BINOP_INT) {
if (ctx->ir_base[op_insn->op1].op == IR_RLOAD
&& ctx->ir_base[op_insn->op1].op2 == insn->op3) {
ctx->rules[insn->op2] = IR_FUSED | IR_BINOP_INT;
ctx->rules[op_insn->op1] = IR_SKIPPED | IR_RLOAD;
return IR_REG_BINOP_INT;
} else if ((ir_op_flags[op_insn->op] & IR_OP_FLAG_COMMUTATIVE)
&& ctx->ir_base[op_insn->op2].op == IR_RLOAD
&& ctx->ir_base[op_insn->op2].op2 == insn->op3) {
SWAP_REFS(op_insn->op1, op_insn->op2);
ctx->rules[insn->op2] = IR_FUSED | IR_BINOP_INT;
ctx->rules[op_insn->op1] = IR_SKIPPED | IR_RLOAD;
return IR_REG_BINOP_INT;
}
}
}
}
return IR_RSTORE;
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: