forked from OSchip/llvm-project
60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
//===-- loop-convert/VariableNaming.h - Gererate variable names -*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declaration of the VariableNamer class, which is
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// responsible for generating new variable names and ensuring that they do not
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// conflict with existing ones.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LLVM_TOOLS_CLANG_TOOLS_EXTRA_LOOP_VARIABLE_NAMING_H_
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#define _LLVM_TOOLS_CLANG_TOOLS_EXTRA_LOOP_VARIABLE_NAMING_H_
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#include "StmtAncestor.h"
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#include "clang/AST/ASTContext.h"
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namespace clang {
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namespace loop_migrate {
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/// \brief Create names for generated variables within a particular statement.
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///
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/// VariableNamer uses a DeclContext as a reference point, checking for any
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/// conflicting declarations higher up in the context or within SourceStmt.
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/// It creates a variable name using hints from a source container and the old
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/// index, if they exist.
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class VariableNamer {
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public:
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VariableNamer(StmtGeneratedVarNameMap *GeneratedDecls,
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const StmtParentMap *ReverseAST, const Stmt *SourceStmt,
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const VarDecl *OldIndex, const VarDecl *TheContainer) :
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GeneratedDecls(GeneratedDecls), ReverseAST(ReverseAST),
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SourceStmt(SourceStmt), OldIndex(OldIndex), TheContainer(TheContainer) { }
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/// \brief Generate a new index name.
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///
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/// Generates the name to be used for an inserted iterator. It relies on
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/// declarationExists() to determine that there are no naming conflicts, and
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/// tries to use some hints from the container name and the old index name.
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std::string createIndexName();
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private:
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StmtGeneratedVarNameMap *GeneratedDecls;
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const StmtParentMap *ReverseAST;
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const Stmt *SourceStmt;
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const VarDecl *OldIndex;
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const VarDecl *TheContainer;
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// Determine whether or not a declaration that would conflict with Symbol
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// exists in an outer context or in any statement contained in SourceStmt.
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bool declarationExists(const StringRef Symbol);
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};
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} // namespace loop_migrate
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} // namespace clang
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#endif // _LLVM_TOOLS_CLANG_TOOLS_EXTRA_LOOP_VARIABLE_NAMING_H_
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