CastExpr should not hold a pointer to the base path. More cleanup.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102249 91177308-0d34-0410-b5e6-96231b3b80d8

8 files changed, 19 insertions, 28 deletions

diff --git a/lib/Sema/Sema.cpp b/lib/Sema/Sema.cpp
index ad4be1a3ab..6975da0b3e 100644
--- a/lib/Sema/Sema.cpp
+++ b/lib/Sema/Sema.cpp
@@ -159,8 +159,7 @@ Sema::~Sema() {
 /// If isLvalue, the result of the cast is an lvalue.
 void Sema::ImpCastExprToType(Expr *&Expr, QualType Ty,
                              CastExpr::CastKind Kind, 
-                             CXXBaseSpecifierArray *BasePath,
-                             bool isLvalue) {
+                             bool isLvalue, CXXBaseSpecifierArray BasePath) {
   QualType ExprTy = Context.getCanonicalType(Expr->getType());
   QualType TypeTy = Context.getCanonicalType(Ty);
 
@@ -180,7 +179,7 @@ void Sema::ImpCastExprToType(Expr *&Expr, QualType Ty,
 
   if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(Expr)) {
     if (ImpCast->getCastKind() == Kind) {
-      assert(!BasePath && "FIXME: Merge paths!");
+      assert(BasePath.empty() && "FIXME: Merge paths!");
       ImpCast->setType(Ty);
       ImpCast->setLvalueCast(isLvalue);
       return;
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index 862de98e1b..48b12b5712 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -3959,8 +3959,9 @@ public:
   /// cast.  If there is already an implicit cast, merge into the existing one.
   /// If isLvalue, the result of the cast is an lvalue.
   void ImpCastExprToType(Expr *&Expr, QualType Type, CastExpr::CastKind Kind,
-                         CXXBaseSpecifierArray *BasePath = 0,
-                         bool isLvalue = false);
+                         bool isLvalue = false,
+                         CXXBaseSpecifierArray BasePath = 
+                          CXXBaseSpecifierArray());
 
   // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts
   // functions and arrays to their respective pointers (C99 6.3.2.1).
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index bf2cba10c7..20e4200fbe 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -6511,7 +6511,7 @@ void Sema::ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc,
       ECD->setInitExpr(new (Context) ImplicitCastExpr(NewTy,
                                                       CastExpr::CK_IntegralCast,
                                                       ECD->getInitExpr(),
-                                                      /*InheritancePath=*/0,
+                                                      CXXBaseSpecifierArray(),
                                                       /*isLvalue=*/false));
     if (getLangOptions().CPlusPlus)
       // C++ [dcl.enum]p4: Following the closing brace of an
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index f5ecff8184..02c41da30b 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -1443,7 +1443,6 @@ Sema::PerformObjectMemberConversion(Expr *&From,
       if (PointerConversions)
         QType = Context.getPointerType(QType);
       ImpCastExprToType(From, QType, CastExpr::CK_UncheckedDerivedToBase,
-                        /*FIXME: InheritancePath=*/0,
                         /*isLvalue=*/!PointerConversions);
 
       FromType = QType;
@@ -1480,7 +1479,6 @@ Sema::PerformObjectMemberConversion(Expr *&From,
       if (PointerConversions)
         UType = Context.getPointerType(UType);
       ImpCastExprToType(From, UType, CastExpr::CK_UncheckedDerivedToBase,
-                        /*FIXME: InheritancePath=*/0,
                         /*isLvalue*/ !PointerConversions);
       FromType = UType;
       FromRecordType = URecordType;
@@ -1499,7 +1497,6 @@ Sema::PerformObjectMemberConversion(Expr *&From,
     return true;
 
   ImpCastExprToType(From, DestType, CastExpr::CK_UncheckedDerivedToBase,
-                    /*FIXME: InheritancePath=*/0,
                     /*isLvalue=*/!PointerConversions);
   return false;
 }
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 042f2c14ab..71d8914761 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -341,7 +341,7 @@ Sema::ActOnCXXTypeid(SourceLocation OpLoc, SourceLocation LParenLoc,
       //   type.
       if (T.hasQualifiers()) {
         ImpCastExprToType(E, T.getUnqualifiedType(), CastExpr::CK_NoOp,
-                          /*InheritancePath=*/0, E->isLvalue(Context));
+                          E->isLvalue(Context));
         TyOrExpr = E;
       }
     }
@@ -392,7 +392,6 @@ bool Sema::CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E) {
   //   or "pointer to function returning T", [...]
   if (E->getType().hasQualifiers())
     ImpCastExprToType(E, E->getType().getUnqualifiedType(), CastExpr::CK_NoOp,
-                      /*InheritancePath=*/0,
                       E->isLvalue(Context) == Expr::LV_Valid);
   
   DefaultFunctionArrayConversion(E);
@@ -1792,8 +1791,7 @@ Sema::PerformImplicitConversion(Expr *&From, QualType ToType,
     // FIXME: Not sure about lvalue vs rvalue here in the presence of rvalue
     // references.
     ImpCastExprToType(From, ToType.getNonReferenceType(),
-                      CastExpr::CK_NoOp, /*InheritancePath=*/0,
-                      ToType->isLValueReferenceType());
+                      CastExpr::CK_NoOp, ToType->isLValueReferenceType());
 
     if (SCS.DeprecatedStringLiteralToCharPtr)
       Diag(From->getLocStart(), diag::warn_deprecated_string_literal_conversion)
@@ -1887,8 +1885,7 @@ QualType Sema::CheckPointerToMemberOperands(
     // Cast LHS to type of use.
     QualType UseType = isIndirect ? Context.getPointerType(Class) : Class;
     bool isLValue = !isIndirect && lex->isLvalue(Context) == Expr::LV_Valid;
-    ImpCastExprToType(lex, UseType, CastExpr::CK_DerivedToBase, 
-                      /*FIXME: InheritancePath=*/0, isLValue);
+    ImpCastExprToType(lex, UseType, CastExpr::CK_DerivedToBase, isLValue);
   }
 
   if (isa<CXXZeroInitValueExpr>(rex->IgnoreParens())) {
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index 904489cdd9..90c8e3bac6 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -3468,7 +3468,7 @@ InitializationSequence::Perform(Sema &S,
       CurInit = S.Owned(new (S.Context) ImplicitCastExpr(Step->Type,
                                                     CastExpr::CK_DerivedToBase,
                                                     (Expr*)CurInit.release(),
-                                                    /*FIXME:InheritancePath=*/0,
+                                                    CXXBaseSpecifierArray(),
                                      Step->Kind == SK_CastDerivedToBaseLValue));
       break;
     }
@@ -3586,10 +3586,10 @@ InitializationSequence::Perform(Sema &S,
 
       CurInitExpr = CurInit.takeAs<Expr>();
       CurInit = S.Owned(new (S.Context) ImplicitCastExpr(CurInitExpr->getType(),
-                                                         CastKind, 
-                                                         CurInitExpr,
-                                                         /*InheritancePath=*/0,
-                                                         IsLvalue));
+                                                        CastKind, 
+                                                        CurInitExpr,
+                                                        CXXBaseSpecifierArray(),
+                                                        IsLvalue));
       
       if (RequiresCopy)
         CurInit = CopyObject(S, Entity.getType().getNonReferenceType(), Entity,
@@ -3601,7 +3601,7 @@ InitializationSequence::Perform(Sema &S,
     case SK_QualificationConversionRValue:
       // Perform a qualification conversion; these can never go wrong.
       S.ImpCastExprToType(CurInitExpr, Step->Type,
-                          CastExpr::CK_NoOp, /*InheritancePath=*/0,
+                          CastExpr::CK_NoOp,
                           Step->Kind == SK_QualificationConversionLValue);
       CurInit.release();
       CurInit = S.Owned(CurInitExpr);
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index 732b9ee3eb..50afb7e1bc 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -2675,8 +2675,8 @@ Sema::PerformObjectArgumentInitialization(Expr *&From,
     return PerformObjectMemberConversion(From, Qualifier, FoundDecl, Method);
 
   if (!Context.hasSameType(From->getType(), DestType))
-    ImpCastExprToType(From, DestType, CastExpr::CK_NoOp, /*InheritancePath=*/0,
-                      /*isLvalue=*/!From->getType()->getAs<PointerType>());
+    ImpCastExprToType(From, DestType, CastExpr::CK_NoOp,
+                      /*isLvalue=*/!From->getType()->isPointerType());
   return false;
 }
 
@@ -3157,7 +3157,7 @@ Sema::AddConversionCandidate(CXXConversionDecl *Conversion,
                             From->getLocStart());
   ImplicitCastExpr ConversionFn(Context.getPointerType(Conversion->getType()),
                                 CastExpr::CK_FunctionToPointerDecay,
-                                &ConversionRef, /*InheritancePath=*/0, false);
+                                &ConversionRef, CXXBaseSpecifierArray(), false);
 
   // Note that it is safe to allocate CallExpr on the stack here because
   // there are 0 arguments (i.e., nothing is allocated using ASTContext's
@@ -6859,8 +6859,7 @@ Expr *Sema::FixOverloadedFunctionReference(Expr *E, DeclAccessPair Found,
     
     return new (Context) ImplicitCastExpr(ICE->getType(), 
                                           ICE->getCastKind(),
-                                          SubExpr,
-                                          /*InheritancePath=*/0,
+                                          SubExpr, CXXBaseSpecifierArray(),
                                           ICE->isLvalueCast());
   } 
   
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index 14d04563d6..7e7413f296 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -2868,7 +2868,6 @@ bool Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
 
     if (IsQualificationConversion(ArgType, ParamType.getNonReferenceType())) {
       ImpCastExprToType(Arg, ParamType, CastExpr::CK_NoOp,
-                        /*InheritancePath=*/0,
                         Arg->isLvalue(Context) == Expr::LV_Valid);
     } else if (!Context.hasSameUnqualifiedType(ArgType,
                                            ParamType.getNonReferenceType())) {
@@ -2933,7 +2932,6 @@ bool Sema::CheckTemplateArgument(NonTypeTemplateParmDecl *Param,
     // Types match exactly: nothing more to do here.
   } else if (IsQualificationConversion(ArgType, ParamType)) {
     ImpCastExprToType(Arg, ParamType, CastExpr::CK_NoOp,
-                      /*InheritancePath=*/0,
                       Arg->isLvalue(Context) == Expr::LV_Valid);
   } else {
     // We can't perform this conversion.