45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
// 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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#ifndef DORIS_BE_SRC_QUERY_CODEGEN_SUBEXPR_ELIMINATION_H
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#define DORIS_BE_SRC_QUERY_CODEGEN_SUBEXPR_ELIMINATION_H
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#include "common/status.h"
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#include "codegen/llvm_codegen.h"
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namespace doris {
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// Optimization pass to remove redundant exprs.
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// TODO: make this into a llvm function pass (i.e. implement FunctionPass interface).
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class SubExprElimination {
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public:
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SubExprElimination(LlvmCodeGen* codegen);
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~SubExprElimination() { }
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// Perform subexpr elimination on function.
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bool run(llvm::Function* function);
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private:
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// Parent codegen object.
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LlvmCodeGen* _codegen;
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};
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}
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#endif
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