f9c67ff806
Added AST and Function classes. Now, we parse the whole file and build up the AST for all of the functions in the Module before we emit IR for the functions (vs. before, when we generated IR along the way as we parsed the source file.)
94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
/*
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Copyright (c) 2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file ast.h
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@brief
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*/
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#ifndef ISPC_AST_H
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#define ISPC_AST_H 1
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#include "ispc.h"
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#include <vector>
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/** @brief Abstract base class for nodes in the abstract syntax tree (AST).
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This class defines a basic interface that all abstract syntax tree
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(AST) nodes must implement. The base classes for both expressions
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(Expr) and statements (Stmt) inherit from this class.
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*/
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class ASTNode {
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public:
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ASTNode(SourcePos p) : pos(p) { }
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virtual ~ASTNode();
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/** The Optimize() method should perform any appropriate early-stage
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optimizations on the node (e.g. constant folding). The caller
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should use the returned ASTNode * in place of the original node.
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This method may return NULL if an error is encountered during
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optimization. */
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virtual ASTNode *Optimize() = 0;
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/** Type checking should be performed by the node when this method is
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called. In the event of an error, a NULL value may be returned.
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As with ASTNode::Optimize(), the caller should store the returned
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pointer in place of the original ASTNode *. */
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virtual ASTNode *TypeCheck() = 0;
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virtual int EstimateCost() const = 0;
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/** All AST nodes must track the file position where they are
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defined. */
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const SourcePos pos;
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};
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/** Simple representation of the abstract syntax trees for all of the
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functions declared in a compilation unit.
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*/
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class AST {
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public:
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/** Add the AST for a function described by the given declaration
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information and source code. */
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void AddFunction(DeclSpecs *ds, Declarator *decl, Stmt *code);
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/** Generate LLVM IR for all of the functions into the current
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module. */
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void GenerateIR();
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private:
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std::vector<Function *> functions;
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};
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#endif // ISPC_AST_H
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