[SYCLomatic][NFC] Move pre-processor code into seperate PreProcessor.…

…cpp/h files. (#2474)

clang/lib/DPCT/ASTTraversal.h

@@ -32,64 +32,6 @@ namespace dpct {
 
 enum class PassKind : unsigned { PK_Analysis = 0, PK_Migration, PK_End };
 
-/// Migration rules at the pre-processing stages, e.g. macro rewriting and
-/// including directives rewriting.
-class IncludesCallbacks : public PPCallbacks {
-  TransformSetTy &TransformSet;
-  SourceManager &SM;
-  RuleGroups &Groups;
-
-  std::unordered_set<std::string> SeenFiles;
-  bool IsFileInCmd = true;
-
-public:
-  IncludesCallbacks(TransformSetTy &TransformSet, SourceManager &SM,
-                    RuleGroups &G)
-      : TransformSet(TransformSet), SM(SM), Groups(G) {}
-  void InclusionDirective(SourceLocation HashLoc, const Token &IncludeTok,
-                          StringRef FileName, bool IsAngled,
-                          CharSourceRange FilenameRange,
-                          OptionalFileEntryRef File, StringRef SearchPath,
-                          StringRef RelativePath, const Module *SuggestedModule,
-                          bool ModuleImported,
-                          SrcMgr::CharacteristicKind FileType) override;
-  /// Hook called whenever a macro definition is seen.
-  void MacroDefined(const Token &MacroNameTok,
-                    const MacroDirective *MD) override;
-  void MacroExpands(const Token &MacroNameTok, const MacroDefinition &MD,
-                    SourceRange Range, const MacroArgs *Args) override;
-  void Ifdef(SourceLocation Loc, const Token &MacroNameTok,
-             const MacroDefinition &MD) override;
-  void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
-              const MacroDefinition &MD) override;
-  // TODO: implement one of this for each source language.
-  bool ReplaceCuMacro(const Token &MacroNameTok, MacroInfo *MI = nullptr);
-  void ReplaceCuMacro(SourceRange ConditionRange, IfType IT,
-                      SourceLocation IfLoc, SourceLocation ElifLoc);
-  void Defined(const Token &MacroNameTok, const MacroDefinition &MD,
-               SourceRange Range) override;
-  void Endif(SourceLocation Loc, SourceLocation IfLoc) override;
-  void FileChanged(SourceLocation Loc, FileChangeReason Reason,
-                   SrcMgr::CharacteristicKind FileType,
-                   FileID PrevFID = FileID()) override;
-  void If(SourceLocation Loc, SourceRange ConditionRange,
-          ConditionValueKind ConditionValue) override;
-  void Else(SourceLocation Loc, SourceLocation IfLoc) override;
-  void Elif(SourceLocation Loc, SourceRange ConditionRange,
-            ConditionValueKind ConditionValue, SourceLocation IfLoc) override;
-  bool ShouldEnter(StringRef FileName, bool IsAngled) override;
-  bool isInAnalysisScope(SourceLocation Loc);
-  // Find the "#" before a preprocessing directive, return -1 if have some false
-  int findPoundSign(SourceLocation DirectiveStart);
-  void insertCudaArchRepl(std::shared_ptr<clang::dpct::ExtReplacement> Repl);
-
-private:
-  /// e.g. "__launch_bounds(32, 32)  void foo()"
-  /// Result is "void foo()"
-  std::shared_ptr<TextModification>
-  removeMacroInvocationAndTrailingSpaces(SourceRange Range);
-};
-
 /// Base class for all tool-related AST traversals.
 class ASTTraversal : public ast_matchers::MatchFinder::MatchCallback {
 public:

clang/lib/DPCT/CMakeLists.txt

@@ -110,6 +110,7 @@ add_subdirectory(RulesSecurity/ConfusableTable)
 
 add_clang_library(DPCT
   ASTTraversal.cpp
+  PreProcessor.cpp
   AnalysisInfo.cpp
   RulesLangLib/CUB/CallExprRewriterCUB.cpp
   RulesLangLib/CUB/RewriterClassMethods.cpp

clang/lib/DPCT/MigrationAction.h

@@ -12,7 +12,9 @@
 #include "clang/Frontend/FrontendAction.h"
 #include "clang/Tooling/Tooling.h"
 
+#include "PreProcessor.h"
 #include "ASTTraversal.h"
+
 #include "RulesSecurity/MisleadingBidirectional.h"
 
 namespace clang {