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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#include "aot_emit_variable.h"
#include "aot_emit_exception.h"
#include "../aot/aot_runtime.h"
#define CHECK_LOCAL(idx) \
do { \
if (idx >= func_ctx->aot_func->func_type->param_count \
+ func_ctx->aot_func->local_count) { \
aot_set_last_error("local index out of range"); \
return false; \
} \
} while (0)
static uint8
get_local_type(AOTFuncContext *func_ctx, uint32 local_idx)
{
AOTFunc *aot_func = func_ctx->aot_func;
uint32 param_count = aot_func->func_type->param_count;
return local_idx < param_count
? aot_func->func_type->types[local_idx]
: aot_func->local_types[local_idx - param_count];
}
bool
aot_compile_op_get_local(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
uint32 local_idx)
{
char name[32];
LLVMValueRef value;
AOTValue *aot_value_top;
uint8 local_type;
CHECK_LOCAL(local_idx);
local_type = get_local_type(func_ctx, local_idx);
snprintf(name, sizeof(name), "%s%d%s", "local", local_idx, "#");
if (!(value = LLVMBuildLoad2(comp_ctx->builder, TO_LLVM_TYPE(local_type),
func_ctx->locals[local_idx], name))) {
aot_set_last_error("llvm build load fail");
return false;
}
PUSH(value, local_type);
aot_value_top =
func_ctx->block_stack.block_list_end->value_stack.value_list_end;
aot_value_top->is_local = true;
aot_value_top->local_idx = local_idx;
return true;
fail:
return false;
}
bool
aot_compile_op_set_local(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
uint32 local_idx)
{
LLVMValueRef value;
CHECK_LOCAL(local_idx);
POP(value, get_local_type(func_ctx, local_idx));
if (!LLVMBuildStore(comp_ctx->builder, value,
func_ctx->locals[local_idx])) {
aot_set_last_error("llvm build store fail");
return false;
}
aot_checked_addr_list_del(func_ctx, local_idx);
return true;
fail:
return false;
}
bool
aot_compile_op_tee_local(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
uint32 local_idx)
{
LLVMValueRef value;
uint8 type;
CHECK_LOCAL(local_idx);
type = get_local_type(func_ctx, local_idx);
POP(value, type);
if (!LLVMBuildStore(comp_ctx->builder, value,
func_ctx->locals[local_idx])) {
aot_set_last_error("llvm build store fail");
return false;
}
PUSH(value, type);
aot_checked_addr_list_del(func_ctx, local_idx);
return true;
fail:
return false;
}
static bool
compile_global(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
uint32 global_idx, bool is_set, bool is_aux_stack)
{
AOTCompData *comp_data = comp_ctx->comp_data;
uint32 import_global_count = comp_data->import_global_count;
uint32 global_base_offset;
uint32 global_offset;
uint8 global_type;
LLVMValueRef offset, global_ptr, global, res;
LLVMTypeRef ptr_type = NULL;
global_base_offset =
offsetof(AOTModuleInstance, global_table_data.bytes)
+ sizeof(AOTMemoryInstance) * comp_ctx->comp_data->memory_count;
bh_assert(global_idx < import_global_count + comp_data->global_count);
if (global_idx < import_global_count) {
global_offset = global_base_offset
+ comp_data->import_globals[global_idx].data_offset;
global_type = comp_data->import_globals[global_idx].type;
}
else {
global_offset =
global_base_offset
+ comp_data->globals[global_idx - import_global_count].data_offset;
global_type = comp_data->globals[global_idx - import_global_count].type;
}
offset = I32_CONST(global_offset);
if (!(global_ptr = LLVMBuildInBoundsGEP2(comp_ctx->builder, INT8_TYPE,
func_ctx->aot_inst, &offset, 1,
"global_ptr_tmp"))) {
aot_set_last_error("llvm build in bounds gep failed.");
return false;
}
switch (global_type) {
case VALUE_TYPE_I32:
case VALUE_TYPE_EXTERNREF:
case VALUE_TYPE_FUNCREF:
ptr_type = comp_ctx->basic_types.int32_ptr_type;
break;
case VALUE_TYPE_I64:
ptr_type = comp_ctx->basic_types.int64_ptr_type;
break;
case VALUE_TYPE_F32:
ptr_type = comp_ctx->basic_types.float32_ptr_type;
break;
case VALUE_TYPE_F64:
ptr_type = comp_ctx->basic_types.float64_ptr_type;
break;
case VALUE_TYPE_V128:
ptr_type = comp_ctx->basic_types.v128_ptr_type;
break;
default:
bh_assert("unknown type");
break;
}
if (!(global_ptr = LLVMBuildBitCast(comp_ctx->builder, global_ptr, ptr_type,
"global_ptr"))) {
aot_set_last_error("llvm build bit cast failed.");
return false;
}
if (!is_set) {
if (!(global =
LLVMBuildLoad2(comp_ctx->builder, TO_LLVM_TYPE(global_type),
global_ptr, "global"))) {
aot_set_last_error("llvm build load failed.");
return false;
}
/* All globals' data is 4-byte aligned */
LLVMSetAlignment(global, 4);
PUSH(global, global_type);
}
else {
POP(global, global_type);
if (is_aux_stack && comp_ctx->enable_aux_stack_check) {
LLVMBasicBlockRef block_curr =
LLVMGetInsertBlock(comp_ctx->builder);
LLVMBasicBlockRef check_overflow_succ, check_underflow_succ;
LLVMValueRef cmp;
/* Add basic blocks */
if (!(check_overflow_succ = LLVMAppendBasicBlockInContext(
comp_ctx->context, func_ctx->func,
"check_overflow_succ"))) {
aot_set_last_error("llvm add basic block failed.");
return false;
}
LLVMMoveBasicBlockAfter(check_overflow_succ, block_curr);
if (!(check_underflow_succ = LLVMAppendBasicBlockInContext(
comp_ctx->context, func_ctx->func,
"check_underflow_succ"))) {
aot_set_last_error("llvm add basic block failed.");
return false;
}
LLVMMoveBasicBlockAfter(check_underflow_succ, check_overflow_succ);
/* Check aux stack overflow */
if (!(cmp = LLVMBuildICmp(comp_ctx->builder, LLVMIntULE, global,
func_ctx->aux_stack_bound, "cmp"))) {
aot_set_last_error("llvm build icmp failed.");
return false;
}
if (!aot_emit_exception(comp_ctx, func_ctx, EXCE_AUX_STACK_OVERFLOW,
true, cmp, check_overflow_succ)) {
return false;
}
/* Check aux stack underflow */
LLVMPositionBuilderAtEnd(comp_ctx->builder, check_overflow_succ);
if (!(cmp = LLVMBuildICmp(comp_ctx->builder, LLVMIntUGT, global,
func_ctx->aux_stack_bottom, "cmp"))) {
aot_set_last_error("llvm build icmp failed.");
return false;
}
if (!aot_emit_exception(comp_ctx, func_ctx,
EXCE_AUX_STACK_UNDERFLOW, true, cmp,
check_underflow_succ)) {
return false;
}
LLVMPositionBuilderAtEnd(comp_ctx->builder, check_underflow_succ);
}
if (!(res = LLVMBuildStore(comp_ctx->builder, global, global_ptr))) {
aot_set_last_error("llvm build store failed.");
return false;
}
/* All globals' data is 4-byte aligned */
LLVMSetAlignment(res, 4);
}
return true;
fail:
return false;
}
bool
aot_compile_op_get_global(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
uint32 global_idx)
{
return compile_global(comp_ctx, func_ctx, global_idx, false, false);
}
bool
aot_compile_op_set_global(AOTCompContext *comp_ctx, AOTFuncContext *func_ctx,
uint32 global_idx, bool is_aux_stack)
{
return compile_global(comp_ctx, func_ctx, global_idx, true, is_aux_stack);
}
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