Add a Profile function for statements so that we can (eventually) determine

when statements and expressions are equivalent.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@77284 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 559 insertions, 1 deletions

diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index bbd1b1ba1c..c25a66aa42 100644
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -1687,7 +1687,7 @@ public:
                     SourceLocation RP) : 
     Expr(ShuffleVectorExprClass, Type), BuiltinLoc(BLoc),
     RParenLoc(RP), NumExprs(nexpr) {
-      
+      // FIXME: Allocate in ASTContext!
     SubExprs = new Stmt*[nexpr];
     for (unsigned i = 0; i < nexpr; i++)
       SubExprs[i] = args[i];
@@ -1915,6 +1915,7 @@ public:
 /// return NULL, indicating that the current initializer list also
 /// serves as its syntactic form.
 class InitListExpr : public Expr {
+  // FIXME: Eliminate this vector in favor of ASTContext allocation
   std::vector<Stmt *> InitExprs;
   SourceLocation LBraceLoc, RBraceLoc;
   
diff --git a/include/clang/AST/Stmt.h b/include/clang/AST/Stmt.h
index 0a64dafd4e..e841f25d76 100644
--- a/include/clang/AST/Stmt.h
+++ b/include/clang/AST/Stmt.h
@@ -26,6 +26,10 @@
 #include <string>
 using llvm::dyn_cast_or_null;
 
+namespace llvm {
+  class FoldingSetNodeID;
+}
+
 namespace clang {
   class ASTContext;
   class Expr;
@@ -227,6 +231,21 @@ public:
   const_child_iterator child_end() const {
     return const_child_iterator(const_cast<Stmt*>(this)->child_end());
   }
+
+  /// \brief Produce a unique representation of the given statement.
+  ///
+  /// \brief ID once the profiling operation is complete, will contain
+  /// the unique representation of the given statement.
+  ///
+  /// \brief Context the AST context in which the statement resides
+  ///
+  /// \brief Canonical whether the profile should be based on the canonical
+  /// representation of this statement (e.g., where non-type template
+  /// parameters are identified by index/level rather than their 
+  /// declaration pointers) or the exact representation of the statement as
+  /// written in the source.
+  void Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context,
+               bool Canonical);
 };
 
 /// DeclStmt - Adaptor class for mixing declarations with statements and
diff --git a/lib/AST/CMakeLists.txt b/lib/AST/CMakeLists.txt
index f9239ed137..2a064b866e 100644
--- a/lib/AST/CMakeLists.txt
+++ b/lib/AST/CMakeLists.txt
@@ -23,6 +23,7 @@ add_clang_library(clangAST
   StmtDumper.cpp
   StmtIterator.cpp
   StmtPrinter.cpp
+  StmtProfile.cpp
   StmtViz.cpp
   TemplateName.cpp
   Type.cpp
diff --git a/lib/AST/StmtProfile.cpp b/lib/AST/StmtProfile.cpp
new file mode 100644
index 0000000000..0698d2f609
--- /dev/null
+++ b/lib/AST/StmtProfile.cpp
@@ -0,0 +1,537 @@
+//===---- StmtProfile.cpp - Profile implementation for Stmt ASTs ----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Stmt::Profile method, which builds a unique bit
+// representation that identifiers a statement/expression.
+//
+//===----------------------------------------------------------------------===//
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/ExprCXX.h"
+#include "clang/AST/ExprObjC.h"
+#include "clang/AST/StmtVisitor.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/Compiler.h"
+using namespace clang;
+
+namespace {
+  class VISIBILITY_HIDDEN StmtProfiler : public StmtVisitor<StmtProfiler> {
+    llvm::FoldingSetNodeID &ID;
+    ASTContext &Context;
+    bool Canonical;
+    
+  public:
+    StmtProfiler(llvm::FoldingSetNodeID &ID, ASTContext &Context,
+                 bool Canonical) 
+      : ID(ID), Context(Context), Canonical(Canonical) { }
+    
+    // FIXME: Use StmtNodes.def to declare all VisitXXX functions
+    
+    void VisitStmt(Stmt *S);
+    void VisitExpr(Expr *S);
+    void VisitDeclRefExpr(DeclRefExpr *S);
+    void VisitPredefinedExpr(PredefinedExpr *S);
+    void VisitIntegerLiteral(IntegerLiteral *S);
+    void VisitCharacterLiteral(CharacterLiteral *S);
+    void VisitFloatingLiteral(FloatingLiteral *S);
+    void VisitImaginaryLiteral(ImaginaryLiteral *S);
+    void VisitStringLiteral(StringLiteral *S);
+    void VisitParenExpr(ParenExpr *S);
+    void VisitUnaryOperator(UnaryOperator *S);
+    void VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *S);
+    void VisitArraySubscriptExpr(ArraySubscriptExpr *S);
+    void VisitCallExpr(CallExpr *S);
+    void VisitMemberExpr(MemberExpr *S);
+    void VisitCompoundLiteralExpr(CompoundLiteralExpr *S);
+    void VisitCastExpr(CastExpr *S);
+    void VisitImplicitCastExpr(ImplicitCastExpr *S);
+    void VisitExplicitCastExpr(ExplicitCastExpr *S);
+    void VisitCStyleCastExpr(CStyleCastExpr *S);
+    void VisitBinaryOperator(BinaryOperator *S);
+    void VisitCompoundAssignOperator(CompoundAssignOperator *S);                    
+    void VisitConditionalOperator(ConditionalOperator *S);
+    void VisitAddrLabelExpr(AddrLabelExpr *S);
+    void VisitStmtExpr(StmtExpr *S);
+    void VisitTypesCompatibleExpr(TypesCompatibleExpr *S);
+    void VisitShuffleVectorExpr(ShuffleVectorExpr *S);
+    void VisitChooseExpr(ChooseExpr *S);
+    void VisitGNUNullExpr(GNUNullExpr *S);
+    void VisitInitListExpr(InitListExpr *S);
+    void VisitDesignatedInitExpr(DesignatedInitExpr *S);
+    void VisitImplicitValueInitExpr(ImplicitValueInitExpr *S);
+    void VisitExtVectorElementExpr(ExtVectorElementExpr *S);
+    void VisitBlockExpr(BlockExpr *S);
+    void VisitBlockDeclRefExpr(BlockDeclRefExpr *S);
+    void VisitCXXOperatorCallExpr(CXXOperatorCallExpr *S);
+    void VisitCXXMemberCallExpr(CXXMemberCallExpr *S);
+    void VisitCXXNamedCastExpr(CXXNamedCastExpr *S);
+    void VisitCXXStaticCastExpr(CXXStaticCastExpr *S);
+    void VisitCXXDynamicCastExpr(CXXDynamicCastExpr *S);
+    void VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *S);
+    void VisitCXXConstCastExpr(CXXConstCastExpr *S);
+    void VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *S);
+    void VisitCXXTypeidExpr(CXXTypeidExpr *S);
+    void VisitCXXThisExpr(CXXThisExpr *S);
+    void VisitCXXThrowExpr(CXXThrowExpr *S);
+    void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *S);
+    void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *S);
+    void VisitCXXConstructExpr(CXXConstructExpr *S);
+    void VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *S);
+    void VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *S);
+    void VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *S);
+    void VisitCXXConditionDeclExpr(CXXConditionDeclExpr *S);
+    void VisitCXXNewExpr(CXXNewExpr *S);
+    void VisitCXXDeleteExpr(CXXDeleteExpr *S);
+    void VisitUnresolvedFunctionNameExpr(UnresolvedFunctionNameExpr *S);
+    void VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *S);
+    void VisitQualifiedDeclRefExpr(QualifiedDeclRefExpr *S);
+    void VisitUnresolvedDeclRefExpr(UnresolvedDeclRefExpr *S);
+    void VisitTemplateIdRefExpr(TemplateIdRefExpr *S);
+    // FIXME: pick up at CXXExprWithTemporaries, handle Objective-C expressions
+    
+    /// \brief Visit a declaration that is referenced within an expression
+    /// or statement.
+    void VisitDecl(Decl *D);
+    
+    /// \brief Visit a type that is referenced within an expression or 
+    /// statement.
+    void VisitType(QualType T);
+    
+    /// \brief Visit a name that occurs within an expression or statement.
+    void VisitName(DeclarationName Name);
+    
+    /// \brief Visit a nested-name-specifier that occurs within an expression
+    /// or statement.
+    void VisitNestedNameSpecifier(NestedNameSpecifier *NNS);
+    
+    /// \brief Visit a template name that occurs within an expression or
+    /// statement.
+    void VisitTemplateName(TemplateName Name);
+    
+    /// \brief Visit template arguments that occur within an expression or
+    /// statement.
+    void VisitTemplateArguments(const TemplateArgument *Args, unsigned NumArgs);
+  };
+}
+
+void StmtProfiler::VisitStmt(Stmt *S) {
+  ID.AddInteger(S->getStmtClass());
+  for (Stmt::child_iterator C = S->child_begin(), CEnd = S->child_end();
+       C != CEnd; ++C)
+    Visit(*C);
+}
+
+void StmtProfiler::VisitExpr(Expr *S) {
+  VisitStmt(S);
+}
+
+void StmtProfiler::VisitDeclRefExpr(DeclRefExpr *S) {
+  VisitExpr(S);
+  VisitDecl(S->getDecl());
+}
+
+void StmtProfiler::VisitPredefinedExpr(PredefinedExpr *S) {
+  VisitExpr(S);
+  ID.AddInteger(S->getIdentType());
+}
+
+void StmtProfiler::VisitIntegerLiteral(IntegerLiteral *S) {
+  VisitExpr(S);
+  S->getValue().Profile(ID);
+}
+
+void StmtProfiler::VisitCharacterLiteral(CharacterLiteral *S) {
+  VisitExpr(S);
+  ID.AddBoolean(S->isWide());
+  ID.AddInteger(S->getValue());
+}
+
+void StmtProfiler::VisitFloatingLiteral(FloatingLiteral *S) {
+  VisitExpr(S);
+  S->getValue().Profile(ID);
+  ID.AddBoolean(S->isExact());
+}
+
+void StmtProfiler::VisitImaginaryLiteral(ImaginaryLiteral *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitStringLiteral(StringLiteral *S) {
+  VisitExpr(S);
+  ID.AddString(S->getStrData(), S->getStrData() + S->getByteLength());
+  ID.AddBoolean(S->isWide());
+}
+
+void StmtProfiler::VisitParenExpr(ParenExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitUnaryOperator(UnaryOperator *S) {
+  VisitExpr(S);
+  ID.AddInteger(S->getOpcode());
+}
+
+void StmtProfiler::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *S) {
+  VisitExpr(S);
+  ID.AddBoolean(S->isSizeOf());
+  if (S->isArgumentType())
+    VisitType(S->getArgumentType());
+}
+
+void StmtProfiler::VisitArraySubscriptExpr(ArraySubscriptExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitCallExpr(CallExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitMemberExpr(MemberExpr *S) {
+  VisitExpr(S);
+  VisitDecl(S->getMemberDecl());
+  ID.AddBoolean(S->isArrow());
+}
+
+void StmtProfiler::VisitCompoundLiteralExpr(CompoundLiteralExpr *S) {
+  VisitExpr(S);
+  ID.AddBoolean(S->isFileScope());
+}
+
+void StmtProfiler::VisitDecl(Decl *D) {
+  if (Canonical) {
+    if (NonTypeTemplateParmDecl *NTTP 
+          = dyn_cast_or_null<NonTypeTemplateParmDecl>(D)) {
+      ID.AddInteger(NTTP->getDepth());
+      ID.AddInteger(NTTP->getIndex());
+      return;
+    }
+
+    // FIXME: Other template template parameters?
+  }
+  
+  ID.AddPointer(D? D->getCanonicalDecl() : 0);
+}
+
+void StmtProfiler::VisitCastExpr(CastExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitImplicitCastExpr(ImplicitCastExpr *S) {
+  VisitCastExpr(S);
+  ID.AddBoolean(S->isLvalueCast());
+}
+
+void StmtProfiler::VisitExplicitCastExpr(ExplicitCastExpr *S) {
+  VisitCastExpr(S);
+  VisitType(S->getTypeAsWritten());
+}
+
+void StmtProfiler::VisitCStyleCastExpr(CStyleCastExpr *S) {
+  VisitExplicitCastExpr(S);
+}
+
+void StmtProfiler::VisitBinaryOperator(BinaryOperator *S) {
+  VisitExpr(S);
+  ID.AddInteger(S->getOpcode());
+}
+
+void StmtProfiler::VisitCompoundAssignOperator(CompoundAssignOperator *S) {
+  VisitBinaryOperator(S);
+}
+
+void StmtProfiler::VisitConditionalOperator(ConditionalOperator *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitAddrLabelExpr(AddrLabelExpr *S) {
+  VisitExpr(S);
+  ID.AddPointer(S->getLabel());
+}
+
+void StmtProfiler::VisitStmtExpr(StmtExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitTypesCompatibleExpr(TypesCompatibleExpr *S) {
+  VisitExpr(S);
+  VisitType(S->getArgType1());
+  VisitType(S->getArgType2());
+}
+
+void StmtProfiler::VisitShuffleVectorExpr(ShuffleVectorExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitChooseExpr(ChooseExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitGNUNullExpr(GNUNullExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitInitListExpr(InitListExpr *S) {
+  if (S->getSyntacticForm()) {
+    VisitInitListExpr(S->getSyntacticForm());
+    return;
+  }
+  
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitDesignatedInitExpr(DesignatedInitExpr *S) {
+  VisitExpr(S);
+  ID.AddBoolean(S->usesGNUSyntax());
+  for (DesignatedInitExpr::designators_iterator D = S->designators_begin(),
+                                             DEnd = S->designators_end();
+       D != DEnd; ++D) {
+    if (D->isFieldDesignator()) {
+      ID.AddInteger(0);
+      VisitName(D->getFieldName());
+      continue;
+    }
+    
+    if (D->isArrayDesignator()) {
+      ID.AddInteger(1);
+    } else {
+      assert(D->isArrayRangeDesignator());
+      ID.AddInteger(2);
+    }
+    ID.AddInteger(D->getFirstExprIndex());
+  }
+}
+
+void StmtProfiler::VisitImplicitValueInitExpr(ImplicitValueInitExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitExtVectorElementExpr(ExtVectorElementExpr *S) {
+  VisitExpr(S);
+  VisitName(&S->getAccessor());
+}
+
+void StmtProfiler::VisitBlockExpr(BlockExpr *S) {
+  VisitExpr(S);
+  VisitDecl(S->getBlockDecl());
+}
+
+void StmtProfiler::VisitBlockDeclRefExpr(BlockDeclRefExpr *S) {
+  VisitExpr(S);
+  VisitDecl(S->getDecl());
+  ID.AddBoolean(S->isByRef());
+  ID.AddBoolean(S->isConstQualAdded());
+}
+
+void StmtProfiler::VisitCXXOperatorCallExpr(CXXOperatorCallExpr *S) {
+  VisitCallExpr(S);
+  ID.AddInteger(S->getOperator());
+}
+
+void StmtProfiler::VisitCXXMemberCallExpr(CXXMemberCallExpr *S) {
+  VisitCallExpr(S);
+}
+
+void StmtProfiler::VisitCXXNamedCastExpr(CXXNamedCastExpr *S) {
+  VisitExplicitCastExpr(S);
+}
+
+void StmtProfiler::VisitCXXStaticCastExpr(CXXStaticCastExpr *S) {
+  VisitCXXNamedCastExpr(S);
+}
+
+void StmtProfiler::VisitCXXDynamicCastExpr(CXXDynamicCastExpr *S) {
+  VisitCXXNamedCastExpr(S);
+}
+
+void StmtProfiler::VisitCXXReinterpretCastExpr(CXXReinterpretCastExpr *S) {
+  VisitCXXNamedCastExpr(S);
+}
+
+void StmtProfiler::VisitCXXConstCastExpr(CXXConstCastExpr *S) {
+  VisitCXXNamedCastExpr(S);
+}
+
+void StmtProfiler::VisitCXXBoolLiteralExpr(CXXBoolLiteralExpr *S) {
+  VisitExpr(S);
+  ID.AddBoolean(S->getValue());
+}
+
+void StmtProfiler::VisitCXXTypeidExpr(CXXTypeidExpr *S) {
+  VisitExpr(S);
+  if (S->isTypeOperand())
+    VisitType(S->getTypeOperand());
+}
+
+void StmtProfiler::VisitCXXThisExpr(CXXThisExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitCXXThrowExpr(CXXThrowExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitCXXDefaultArgExpr(CXXDefaultArgExpr *S) {
+  VisitExpr(S);
+  VisitDecl(S->getParam());
+}
+
+void StmtProfiler::VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *S) {
+  VisitExpr(S);
+  VisitDecl(
+         const_cast<CXXDestructorDecl *>(S->getTemporary()->getDestructor()));
+}
+
+void StmtProfiler::VisitCXXConstructExpr(CXXConstructExpr *S) {
+  VisitExpr(S);
+  VisitDecl(S->getConstructor());
+  ID.AddBoolean(S->isElidable());
+}
+
+void StmtProfiler::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *S) {
+  VisitExplicitCastExpr(S);
+}
+
+void StmtProfiler::VisitCXXTemporaryObjectExpr(CXXTemporaryObjectExpr *S) {
+  VisitCXXConstructExpr(S);
+}
+
+void StmtProfiler::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *S) {
+  VisitExpr(S);
+}
+
+void StmtProfiler::VisitCXXConditionDeclExpr(CXXConditionDeclExpr *S) {
+  VisitDeclRefExpr(S);
+}
+
+void StmtProfiler::VisitCXXDeleteExpr(CXXDeleteExpr *S) {
+  VisitExpr(S);
+  ID.AddBoolean(S->isGlobalDelete());
+  ID.AddBoolean(S->isArrayForm());
+  VisitDecl(S->getOperatorDelete());
+}
+
+
+void StmtProfiler::VisitCXXNewExpr(CXXNewExpr *S) {
+  VisitExpr(S);
+  VisitType(S->getAllocatedType());
+  VisitDecl(S->getOperatorNew());
+  VisitDecl(S->getOperatorDelete());
+  VisitDecl(S->getConstructor());
+  ID.AddBoolean(S->isArray());
+  ID.AddInteger(S->getNumPlacementArgs());
+  ID.AddBoolean(S->isGlobalNew());
+  ID.AddBoolean(S->isParenTypeId());
+  ID.AddBoolean(S->hasInitializer());
+  ID.AddInteger(S->getNumConstructorArgs());
+}
+
+void 
+StmtProfiler::VisitUnresolvedFunctionNameExpr(UnresolvedFunctionNameExpr *S) {
+  VisitExpr(S);
+  VisitName(S->getName());
+}
+
+void StmtProfiler::VisitUnaryTypeTraitExpr(UnaryTypeTraitExpr *S) {
+  VisitExpr(S);
+  ID.AddInteger(S->getTrait());
+  VisitType(S->getQueriedType());
+}
+
+void StmtProfiler::VisitQualifiedDeclRefExpr(QualifiedDeclRefExpr *S) {
+  VisitDeclRefExpr(S);
+  VisitNestedNameSpecifier(S->getQualifier());
+}
+
+void StmtProfiler::VisitUnresolvedDeclRefExpr(UnresolvedDeclRefExpr *S) {
+  VisitExpr(S);
+  VisitName(S->getDeclName());
+  VisitNestedNameSpecifier(S->getQualifier());
+  ID.AddBoolean(S->isAddressOfOperand());
+}
+
+void StmtProfiler::VisitTemplateIdRefExpr(TemplateIdRefExpr *S) {
+  VisitExpr(S);
+  VisitNestedNameSpecifier(S->getQualifier());
+  VisitTemplateName(S->getTemplateName());
+  VisitTemplateArguments(S->getTemplateArgs(), S->getNumTemplateArgs());
+}
+
+void StmtProfiler::VisitType(QualType T) {
+  if (Canonical) {
+    if (const TemplateTypeParmType *TTP = T->getAs<TemplateTypeParmType>()) {
+      ID.AddInteger(TTP->getDepth());
+      ID.AddInteger(TTP->getIndex());
+      return;
+    }
+    
+    T = Context.getCanonicalType(T);
+  }
+  
+  ID.AddPointer(T.getAsOpaquePtr());
+}
+
+void StmtProfiler::VisitName(DeclarationName Name) {
+  ID.AddPointer(Name.getAsOpaquePtr());
+}
+
+void StmtProfiler::VisitNestedNameSpecifier(NestedNameSpecifier *NNS) {
+  if (Canonical)
+    NNS = Context.getCanonicalNestedNameSpecifier(NNS);
+  ID.AddPointer(NNS);
+}
+
+void StmtProfiler::VisitTemplateName(TemplateName Name) {
+  if (Canonical)
+    Name = Context.getCanonicalTemplateName(Name);
+  
+  Name.Profile(ID);
+}
+
+void StmtProfiler::VisitTemplateArguments(const TemplateArgument *Args, 
+                                          unsigned NumArgs) {
+  ID.AddInteger(NumArgs);
+  for (unsigned I = 0; I != NumArgs; ++I) {
+    const TemplateArgument &Arg = Args[I];
+    
+    // Mostly repetitive with TemplateArgument::Profile!
+    ID.AddInteger(Arg.getKind());
+    switch (Arg.getKind()) {
+      case TemplateArgument::Null:
+        break;
+        
+      case TemplateArgument::Type:
+        VisitType(Arg.getAsType());
+        break;
+        
+      case TemplateArgument::Declaration:
+        VisitDecl(Arg.getAsDecl());
+        break;
+        
+      case TemplateArgument::Integral:
+        Arg.getAsIntegral()->Profile(ID);
+        VisitType(Arg.getIntegralType());
+        break;
+        
+      case TemplateArgument::Expression:
+        Visit(Arg.getAsExpr());
+        break;
+        
+      case TemplateArgument::Pack:
+        VisitTemplateArguments(Arg.pack_begin(), Arg.pack_size());
+        break;
+    }
+  }
+}
+
+void Stmt::Profile(llvm::FoldingSetNodeID &ID, ASTContext &Context,
+                   bool Canonical) {
+  StmtProfiler Profiler(ID, Context, Canonical);
+  Profiler.Visit(this);
+}