109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
// Modifications copyright (C) 2017, Baidu.com, Inc.
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// Copyright 2017 The Apache Software Foundation
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// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "null_literal.h"
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#include "codegen/llvm_codegen.h"
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#include "codegen/codegen_anyval.h"
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#include "gen_cpp/Exprs_types.h"
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#include "runtime/runtime_state.h"
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using llvm::BasicBlock;
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using llvm::Function;
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using llvm::Value;
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namespace palo {
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NullLiteral::NullLiteral(const TExprNode& node) :
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Expr(node) {
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}
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// NullLiteral::NullLiteral(PrimitiveType type) : Expr(TypeDescriptor(type)) {
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// }
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BooleanVal NullLiteral::get_boolean_val(ExprContext*, TupleRow*) {
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return BooleanVal::null();
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}
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TinyIntVal NullLiteral::get_tiny_int_val(ExprContext*, TupleRow*) {
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return TinyIntVal::null();
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}
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SmallIntVal NullLiteral::get_small_int_val(ExprContext*, TupleRow*) {
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return SmallIntVal::null();
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}
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IntVal NullLiteral::get_int_val(ExprContext*, TupleRow*) {
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return IntVal::null();
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}
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BigIntVal NullLiteral::get_big_int_val(ExprContext*, TupleRow*) {
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return BigIntVal::null();
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}
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FloatVal NullLiteral::get_float_val(ExprContext*, TupleRow*) {
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return FloatVal::null();
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}
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DoubleVal NullLiteral::get_double_val(ExprContext*, TupleRow*) {
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return DoubleVal::null();
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}
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StringVal NullLiteral::get_string_val(ExprContext*, TupleRow*) {
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return StringVal::null();
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}
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DateTimeVal NullLiteral::get_datetime_val(ExprContext*, TupleRow*) {
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return DateTimeVal::null();
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}
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DecimalVal NullLiteral::get_decimal_val(ExprContext*, TupleRow*) {
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return DecimalVal::null();
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}
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// Generated IR for a bigint NULL literal:
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//
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// define { i8, i64 } @NullLiteral(i8* %context, %"class.impala::TupleRow"* %row) {
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// entry:
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// ret { i8, i64 } { i8 1, i64 0 }
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// }
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Status NullLiteral::get_codegend_compute_fn(RuntimeState* state, llvm::Function** fn) {
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if (_ir_compute_fn != NULL) {
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*fn = _ir_compute_fn;
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return Status::OK;
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}
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DCHECK_EQ(get_num_children(), 0);
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LlvmCodeGen* codegen = NULL;
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RETURN_IF_ERROR(state->get_codegen(&codegen));
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Value* args[2];
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*fn = create_ir_function_prototype(codegen, "NullLiteral", &args);
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BasicBlock* entry_block = BasicBlock::Create(codegen->context(), "entry", *fn);
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LlvmCodeGen::LlvmBuilder builder(entry_block);
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Value* v = CodegenAnyVal::get_null_val(codegen, type());
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builder.CreateRet(v);
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*fn = codegen->finalize_function(*fn);
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_ir_compute_fn = *fn;
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return Status::OK;
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}
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}
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