r274454 - [Refactor NFC] Rename the (non-CCE, fold-failure) Diag during constant expression evaluation as FFDiag.

Faisal Vali via cfe-commits cfe-commits at lists.llvm.org
Sat Jul 2 15:34:25 PDT 2016


Author: faisalv
Date: Sat Jul  2 17:34:24 2016
New Revision: 274454

URL: http://llvm.org/viewvc/llvm-project?rev=274454&view=rev
Log:
[Refactor NFC] Rename the (non-CCE, fold-failure) Diag during constant expression evaluation as FFDiag.

Currently, we have CCEDiags (C++11 core constant expression diags) and Fold failure diagnostics [I don't claim to yet fully understand exactly why we need the difference].  This patch explicitly replaces Info.Diag (whose use always represents a fold failure diag within the file) with Info.FFDiag.  This makes it more easily greppable in the file, and just like the name Info.CCEDiag, it gives the reader slight further insight into the nature of the diagnostic (as opposed to Info.Diag).

This patch is a preliminary refactoring step in an effort to allow support for compatibility-warnings and extensions (such as constexpr lambda) during constant expression evaluation.

All regressions pass.


Modified:
    cfe/trunk/lib/AST/ExprConstant.cpp

Modified: cfe/trunk/lib/AST/ExprConstant.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/ExprConstant.cpp?rev=274454&r1=274453&r2=274454&view=diff
==============================================================================
--- cfe/trunk/lib/AST/ExprConstant.cpp (original)
+++ cfe/trunk/lib/AST/ExprConstant.cpp Sat Jul  2 17:34:24 2016
@@ -562,12 +562,12 @@ namespace {
         return false;
       if (NextCallIndex == 0) {
         // NextCallIndex has wrapped around.
-        Diag(Loc, diag::note_constexpr_call_limit_exceeded);
+        FFDiag(Loc, diag::note_constexpr_call_limit_exceeded);
         return false;
       }
       if (CallStackDepth <= getLangOpts().ConstexprCallDepth)
         return true;
-      Diag(Loc, diag::note_constexpr_depth_limit_exceeded)
+      FFDiag(Loc, diag::note_constexpr_depth_limit_exceeded)
         << getLangOpts().ConstexprCallDepth;
       return false;
     }
@@ -584,7 +584,7 @@ namespace {
 
     bool nextStep(const Stmt *S) {
       if (!StepsLeft) {
-        Diag(S->getLocStart(), diag::note_constexpr_step_limit_exceeded);
+        FFDiag(S->getLocStart(), diag::note_constexpr_step_limit_exceeded);
         return false;
       }
       --StepsLeft;
@@ -602,11 +602,10 @@ namespace {
     /// Add notes containing a call stack to the current point of evaluation.
     void addCallStack(unsigned Limit);
 
-  public:
-    /// Diagnose that the evaluation cannot be folded.
-    OptionalDiagnostic Diag(SourceLocation Loc, diag::kind DiagId
-                              = diag::note_invalid_subexpr_in_const_expr,
-                            unsigned ExtraNotes = 0, bool IsCCEDiag = false) {
+  private:
+    OptionalDiagnostic Diag(SourceLocation Loc, diag::kind DiagId,
+                            unsigned ExtraNotes, bool IsCCEDiag) {
+    
       if (EvalStatus.Diag) {
         // If we have a prior diagnostic, it will be noting that the expression
         // isn't a constant expression. This diagnostic is more important,
@@ -651,12 +650,20 @@ namespace {
       HasActiveDiagnostic = false;
       return OptionalDiagnostic();
     }
-
-    OptionalDiagnostic Diag(const Expr *E, diag::kind DiagId
+  public:
+    // Diagnose that the evaluation could not be folded (FF => FoldFailure)
+    OptionalDiagnostic
+    FFDiag(SourceLocation Loc,
+          diag::kind DiagId = diag::note_invalid_subexpr_in_const_expr,
+          unsigned ExtraNotes = 0) {
+      return Diag(Loc, DiagId, ExtraNotes, false);
+    }
+    
+    OptionalDiagnostic FFDiag(const Expr *E, diag::kind DiagId
                               = diag::note_invalid_subexpr_in_const_expr,
-                            unsigned ExtraNotes = 0, bool IsCCEDiag = false) {
+                            unsigned ExtraNotes = 0) {
       if (EvalStatus.Diag)
-        return Diag(E->getExprLoc(), DiagId, ExtraNotes, IsCCEDiag);
+        return Diag(E->getExprLoc(), DiagId, ExtraNotes, /*IsCCEDiag*/false);
       HasActiveDiagnostic = false;
       return OptionalDiagnostic();
     }
@@ -666,8 +673,7 @@ namespace {
     ///
     /// FIXME: Stop evaluating if we're in EM_ConstantExpression or
     /// EM_PotentialConstantExpression mode and we produce one of these.
-    template<typename LocArg>
-    OptionalDiagnostic CCEDiag(LocArg Loc, diag::kind DiagId
+    OptionalDiagnostic CCEDiag(SourceLocation Loc, diag::kind DiagId
                                  = diag::note_invalid_subexpr_in_const_expr,
                                unsigned ExtraNotes = 0) {
       // Don't override a previous diagnostic. Don't bother collecting
@@ -678,7 +684,11 @@ namespace {
       }
       return Diag(Loc, DiagId, ExtraNotes, true);
     }
-
+    OptionalDiagnostic CCEDiag(const Expr *E, diag::kind DiagId
+                                 = diag::note_invalid_subexpr_in_const_expr,
+                               unsigned ExtraNotes = 0) {
+      return CCEDiag(E->getExprLoc(), DiagId, ExtraNotes);
+    }
     /// Add a note to a prior diagnostic.
     OptionalDiagnostic Note(SourceLocation Loc, diag::kind DiagId) {
       if (!HasActiveDiagnostic)
@@ -1401,12 +1411,12 @@ static bool CheckLValueConstantExpressio
   if (!IsGlobalLValue(Base)) {
     if (Info.getLangOpts().CPlusPlus11) {
       const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>();
-      Info.Diag(Loc, diag::note_constexpr_non_global, 1)
+      Info.FFDiag(Loc, diag::note_constexpr_non_global, 1)
         << IsReferenceType << !Designator.Entries.empty()
         << !!VD << VD;
       NoteLValueLocation(Info, Base);
     } else {
-      Info.Diag(Loc);
+      Info.FFDiag(Loc);
     }
     // Don't allow references to temporaries to escape.
     return false;
@@ -1456,7 +1466,7 @@ static bool CheckLValueConstantExpressio
   // Does this refer one past the end of some object?
   if (!Designator.Invalid && Designator.isOnePastTheEnd()) {
     const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>();
-    Info.Diag(Loc, diag::note_constexpr_past_end, 1)
+    Info.FFDiag(Loc, diag::note_constexpr_past_end, 1)
       << !Designator.Entries.empty() << !!VD << VD;
     NoteLValueLocation(Info, Base);
   }
@@ -1480,10 +1490,10 @@ static bool CheckLiteralType(EvalInfo &I
 
   // Prvalue constant expressions must be of literal types.
   if (Info.getLangOpts().CPlusPlus11)
-    Info.Diag(E, diag::note_constexpr_nonliteral)
+    Info.FFDiag(E, diag::note_constexpr_nonliteral)
       << E->getType();
   else
-    Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+    Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
   return false;
 }
 
@@ -1493,7 +1503,7 @@ static bool CheckLiteralType(EvalInfo &I
 static bool CheckConstantExpression(EvalInfo &Info, SourceLocation DiagLoc,
                                     QualType Type, const APValue &Value) {
   if (Value.isUninit()) {
-    Info.Diag(DiagLoc, diag::note_constexpr_uninitialized)
+    Info.FFDiag(DiagLoc, diag::note_constexpr_uninitialized)
       << true << Type;
     return false;
   }
@@ -1703,7 +1713,7 @@ static bool truncateBitfieldValue(EvalIn
     // FIXME: In this case, we should provide the diagnostic for casting
     // a pointer to an integer.
     assert(Value.isLValue() && "integral value neither int nor lvalue?");
-    Info.Diag(E);
+    Info.FFDiag(E);
     return false;
   }
 
@@ -1745,7 +1755,7 @@ static bool EvalAndBitcastToAPInt(EvalIn
       } else {
         // Don't try to handle vectors of anything other than int or float
         // (not sure if it's possible to hit this case).
-        Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+        Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
         return false;
       }
       unsigned BaseEltSize = EltAsInt.getBitWidth();
@@ -1758,7 +1768,7 @@ static bool EvalAndBitcastToAPInt(EvalIn
   }
   // Give up if the input isn't an int, float, or vector.  For example, we
   // reject "(v4i16)(intptr_t)&a".
-  Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+  Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
   return false;
 }
 
@@ -1794,7 +1804,7 @@ static bool handleIntIntBinOp(EvalInfo &
                               APSInt &Result) {
   switch (Opcode) {
   default:
-    Info.Diag(E);
+    Info.FFDiag(E);
     return false;
   case BO_Mul:
     return CheckedIntArithmetic(Info, E, LHS, RHS, LHS.getBitWidth() * 2,
@@ -1811,7 +1821,7 @@ static bool handleIntIntBinOp(EvalInfo &
   case BO_Div:
   case BO_Rem:
     if (RHS == 0) {
-      Info.Diag(E, diag::note_expr_divide_by_zero);
+      Info.FFDiag(E, diag::note_expr_divide_by_zero);
       return false;
     }
     Result = (Opcode == BO_Rem ? LHS % RHS : LHS / RHS);
@@ -1892,7 +1902,7 @@ static bool handleFloatFloatBinOp(EvalIn
                                   const APFloat &RHS) {
   switch (Opcode) {
   default:
-    Info.Diag(E);
+    Info.FFDiag(E);
     return false;
   case BO_Mul:
     LHS.multiply(RHS, APFloat::rmNearestTiesToEven);
@@ -2035,14 +2045,14 @@ static bool HandleSizeof(EvalInfo &Info,
   }
 
   if (Type->isDependentType()) {
-    Info.Diag(Loc);
+    Info.FFDiag(Loc);
     return false;
   }
 
   if (!Type->isConstantSizeType()) {
     // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2.
     // FIXME: Better diagnostic.
-    Info.Diag(Loc);
+    Info.FFDiag(Loc);
     return false;
   }
 
@@ -2106,7 +2116,7 @@ static bool evaluateVarDeclInit(EvalInfo
     if (Info.checkingPotentialConstantExpression())
       return false;
     if (!Frame || !Frame->Arguments) {
-      Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+      Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
       return false;
     }
     Result = &Frame->Arguments[PVD->getFunctionScopeIndex()];
@@ -2127,7 +2137,7 @@ static bool evaluateVarDeclInit(EvalInfo
       if (Info.checkingPotentialConstantExpression())
         return false;
       // FIXME: implement capture evaluation during constant expr evaluation.
-      Info.Diag(E->getLocStart(),
+      Info.FFDiag(E->getLocStart(),
            diag::note_unimplemented_constexpr_lambda_feature_ast)
           << "captures not currently allowed";
       return false;
@@ -2141,7 +2151,7 @@ static bool evaluateVarDeclInit(EvalInfo
     // If we're checking a potential constant expression, the variable could be
     // initialized later.
     if (!Info.checkingPotentialConstantExpression())
-      Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+      Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
     return false;
   }
 
@@ -2155,7 +2165,7 @@ static bool evaluateVarDeclInit(EvalInfo
   // Never evaluate the initializer of a weak variable. We can't be sure that
   // this is the definition which will be used.
   if (VD->isWeak()) {
-    Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+    Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
     return false;
   }
 
@@ -2163,7 +2173,7 @@ static bool evaluateVarDeclInit(EvalInfo
   // this in the cases where it matters for conformance.
   SmallVector<PartialDiagnosticAt, 8> Notes;
   if (!VD->evaluateValue(Notes)) {
-    Info.Diag(E, diag::note_constexpr_var_init_non_constant,
+    Info.FFDiag(E, diag::note_constexpr_var_init_non_constant,
               Notes.size() + 1) << VD;
     Info.Note(VD->getLocation(), diag::note_declared_at);
     Info.addNotes(Notes);
@@ -2304,7 +2314,7 @@ static bool diagnoseUnreadableFields(Eva
     // FIXME: Add core issue number for the union case.
     if (Field->isMutable() &&
         (RD->isUnion() || isReadByLvalueToRvalueConversion(Field->getType()))) {
-      Info.Diag(E, diag::note_constexpr_ltor_mutable, 1) << Field;
+      Info.FFDiag(E, diag::note_constexpr_ltor_mutable, 1) << Field;
       Info.Note(Field->getLocation(), diag::note_declared_at);
       return true;
     }
@@ -2358,10 +2368,10 @@ findSubobject(EvalInfo &Info, const Expr
     return handler.failed();
   if (Sub.isOnePastTheEnd()) {
     if (Info.getLangOpts().CPlusPlus11)
-      Info.Diag(E, diag::note_constexpr_access_past_end)
+      Info.FFDiag(E, diag::note_constexpr_access_past_end)
         << handler.AccessKind;
     else
-      Info.Diag(E);
+      Info.FFDiag(E);
     return handler.failed();
   }
 
@@ -2373,7 +2383,7 @@ findSubobject(EvalInfo &Info, const Expr
   for (unsigned I = 0, N = Sub.Entries.size(); /**/; ++I) {
     if (O->isUninit()) {
       if (!Info.checkingPotentialConstantExpression())
-        Info.Diag(E, diag::note_constexpr_access_uninit) << handler.AccessKind;
+        Info.FFDiag(E, diag::note_constexpr_access_uninit) << handler.AccessKind;
       return handler.failed();
     }
 
@@ -2408,10 +2418,10 @@ findSubobject(EvalInfo &Info, const Expr
         // Note, it should not be possible to form a pointer with a valid
         // designator which points more than one past the end of the array.
         if (Info.getLangOpts().CPlusPlus11)
-          Info.Diag(E, diag::note_constexpr_access_past_end)
+          Info.FFDiag(E, diag::note_constexpr_access_past_end)
             << handler.AccessKind;
         else
-          Info.Diag(E);
+          Info.FFDiag(E);
         return handler.failed();
       }
 
@@ -2441,10 +2451,10 @@ findSubobject(EvalInfo &Info, const Expr
       uint64_t Index = Sub.Entries[I].ArrayIndex;
       if (Index > 1) {
         if (Info.getLangOpts().CPlusPlus11)
-          Info.Diag(E, diag::note_constexpr_access_past_end)
+          Info.FFDiag(E, diag::note_constexpr_access_past_end)
             << handler.AccessKind;
         else
-          Info.Diag(E);
+          Info.FFDiag(E);
         return handler.failed();
       }
 
@@ -2464,7 +2474,7 @@ findSubobject(EvalInfo &Info, const Expr
       }
     } else if (const FieldDecl *Field = getAsField(Sub.Entries[I])) {
       if (Field->isMutable() && handler.AccessKind == AK_Read) {
-        Info.Diag(E, diag::note_constexpr_ltor_mutable, 1)
+        Info.FFDiag(E, diag::note_constexpr_ltor_mutable, 1)
           << Field;
         Info.Note(Field->getLocation(), diag::note_declared_at);
         return handler.failed();
@@ -2476,7 +2486,7 @@ findSubobject(EvalInfo &Info, const Expr
         const FieldDecl *UnionField = O->getUnionField();
         if (!UnionField ||
             UnionField->getCanonicalDecl() != Field->getCanonicalDecl()) {
-          Info.Diag(E, diag::note_constexpr_access_inactive_union_member)
+          Info.FFDiag(E, diag::note_constexpr_access_inactive_union_member)
             << handler.AccessKind << Field << !UnionField << UnionField;
           return handler.failed();
         }
@@ -2492,11 +2502,11 @@ findSubobject(EvalInfo &Info, const Expr
       if (ObjType.isVolatileQualified()) {
         if (Info.getLangOpts().CPlusPlus) {
           // FIXME: Include a description of the path to the volatile subobject.
-          Info.Diag(E, diag::note_constexpr_access_volatile_obj, 1)
+          Info.FFDiag(E, diag::note_constexpr_access_volatile_obj, 1)
             << handler.AccessKind << 2 << Field;
           Info.Note(Field->getLocation(), diag::note_declared_at);
         } else {
-          Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+          Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
         }
         return handler.failed();
       }
@@ -2568,7 +2578,7 @@ struct ModifySubobjectHandler {
   bool checkConst(QualType QT) {
     // Assigning to a const object has undefined behavior.
     if (QT.isConstQualified()) {
-      Info.Diag(E, diag::note_constexpr_modify_const_type) << QT;
+      Info.FFDiag(E, diag::note_constexpr_modify_const_type) << QT;
       return false;
     }
     return true;
@@ -2587,7 +2597,7 @@ struct ModifySubobjectHandler {
       return false;
     if (!NewVal.isInt()) {
       // Maybe trying to write a cast pointer value into a complex?
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
     Value = NewVal.getInt();
@@ -2678,7 +2688,7 @@ static CompleteObject findCompleteObject
                                          AccessKinds AK, const LValue &LVal,
                                          QualType LValType) {
   if (!LVal.Base) {
-    Info.Diag(E, diag::note_constexpr_access_null) << AK;
+    Info.FFDiag(E, diag::note_constexpr_access_null) << AK;
     return CompleteObject();
   }
 
@@ -2686,7 +2696,7 @@ static CompleteObject findCompleteObject
   if (LVal.CallIndex) {
     Frame = Info.getCallFrame(LVal.CallIndex);
     if (!Frame) {
-      Info.Diag(E, diag::note_constexpr_lifetime_ended, 1)
+      Info.FFDiag(E, diag::note_constexpr_lifetime_ended, 1)
         << AK << LVal.Base.is<const ValueDecl*>();
       NoteLValueLocation(Info, LVal.Base);
       return CompleteObject();
@@ -2699,10 +2709,10 @@ static CompleteObject findCompleteObject
   // semantics.
   if (LValType.isVolatileQualified()) {
     if (Info.getLangOpts().CPlusPlus)
-      Info.Diag(E, diag::note_constexpr_access_volatile_type)
+      Info.FFDiag(E, diag::note_constexpr_access_volatile_type)
         << AK << LValType;
     else
-      Info.Diag(E);
+      Info.FFDiag(E);
     return CompleteObject();
   }
 
@@ -2724,18 +2734,18 @@ static CompleteObject findCompleteObject
         VD = VDef;
     }
     if (!VD || VD->isInvalidDecl()) {
-      Info.Diag(E);
+      Info.FFDiag(E);
       return CompleteObject();
     }
 
     // Accesses of volatile-qualified objects are not allowed.
     if (BaseType.isVolatileQualified()) {
       if (Info.getLangOpts().CPlusPlus) {
-        Info.Diag(E, diag::note_constexpr_access_volatile_obj, 1)
+        Info.FFDiag(E, diag::note_constexpr_access_volatile_obj, 1)
           << AK << 1 << VD;
         Info.Note(VD->getLocation(), diag::note_declared_at);
       } else {
-        Info.Diag(E);
+        Info.FFDiag(E);
       }
       return CompleteObject();
     }
@@ -2750,7 +2760,7 @@ static CompleteObject findCompleteObject
         // evaluation.
       } else if (AK != AK_Read) {
         // All the remaining cases only permit reading.
-        Info.Diag(E, diag::note_constexpr_modify_global);
+        Info.FFDiag(E, diag::note_constexpr_modify_global);
         return CompleteObject();
       } else if (VD->isConstexpr()) {
         // OK, we can read this variable.
@@ -2760,10 +2770,10 @@ static CompleteObject findCompleteObject
               (Info.getLangOpts().OpenCL &&
                BaseType.getAddressSpace() == LangAS::opencl_constant))) {
           if (Info.getLangOpts().CPlusPlus) {
-            Info.Diag(E, diag::note_constexpr_ltor_non_const_int, 1) << VD;
+            Info.FFDiag(E, diag::note_constexpr_ltor_non_const_int, 1) << VD;
             Info.Note(VD->getLocation(), diag::note_declared_at);
           } else {
-            Info.Diag(E);
+            Info.FFDiag(E);
           }
           return CompleteObject();
         }
@@ -2784,10 +2794,10 @@ static CompleteObject findCompleteObject
           // The definition of this variable could be constexpr. We can't
           // access it right now, but may be able to in future.
         } else if (Info.getLangOpts().CPlusPlus11) {
-          Info.Diag(E, diag::note_constexpr_ltor_non_constexpr, 1) << VD;
+          Info.FFDiag(E, diag::note_constexpr_ltor_non_constexpr, 1) << VD;
           Info.Note(VD->getLocation(), diag::note_declared_at);
         } else {
-          Info.Diag(E);
+          Info.FFDiag(E);
         }
         return CompleteObject();
       }
@@ -2823,7 +2833,7 @@ static CompleteObject findCompleteObject
         if (!(BaseType.isConstQualified() &&
               BaseType->isIntegralOrEnumerationType()) &&
             !(VD && VD->getCanonicalDecl() == ED->getCanonicalDecl())) {
-          Info.Diag(E, diag::note_constexpr_access_static_temporary, 1) << AK;
+          Info.FFDiag(E, diag::note_constexpr_access_static_temporary, 1) << AK;
           Info.Note(MTE->getExprLoc(), diag::note_constexpr_temporary_here);
           return CompleteObject();
         }
@@ -2831,7 +2841,7 @@ static CompleteObject findCompleteObject
         BaseVal = Info.Ctx.getMaterializedTemporaryValue(MTE, false);
         assert(BaseVal && "got reference to unevaluated temporary");
       } else {
-        Info.Diag(E);
+        Info.FFDiag(E);
         return CompleteObject();
       }
     } else {
@@ -2842,11 +2852,11 @@ static CompleteObject findCompleteObject
     // Volatile temporary objects cannot be accessed in constant expressions.
     if (BaseType.isVolatileQualified()) {
       if (Info.getLangOpts().CPlusPlus) {
-        Info.Diag(E, diag::note_constexpr_access_volatile_obj, 1)
+        Info.FFDiag(E, diag::note_constexpr_access_volatile_obj, 1)
           << AK << 0;
         Info.Note(Base->getExprLoc(), diag::note_constexpr_temporary_here);
       } else {
-        Info.Diag(E);
+        Info.FFDiag(E);
       }
       return CompleteObject();
     }
@@ -2900,7 +2910,7 @@ static bool handleLValueToRValueConversi
       // an ICE in C, so this only matters for fold.
       assert(!Info.getLangOpts().CPlusPlus && "lvalue compound literal in c++?");
       if (Type.isVolatileQualified()) {
-        Info.Diag(Conv);
+        Info.FFDiag(Conv);
         return false;
       }
       APValue Lit;
@@ -2929,7 +2939,7 @@ static bool handleAssignment(EvalInfo &I
     return false;
 
   if (!Info.getLangOpts().CPlusPlus14) {
-    Info.Diag(E);
+    Info.FFDiag(E);
     return false;
   }
 
@@ -2957,7 +2967,7 @@ struct CompoundAssignSubobjectHandler {
   bool checkConst(QualType QT) {
     // Assigning to a const object has undefined behavior.
     if (QT.isConstQualified()) {
-      Info.Diag(E, diag::note_constexpr_modify_const_type) << QT;
+      Info.FFDiag(E, diag::note_constexpr_modify_const_type) << QT;
       return false;
     }
     return true;
@@ -2973,13 +2983,13 @@ struct CompoundAssignSubobjectHandler {
     case APValue::ComplexInt:
     case APValue::ComplexFloat:
       // FIXME: Implement complex compound assignment.
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     case APValue::LValue:
       return foundPointer(Subobj, SubobjType);
     default:
       // FIXME: can this happen?
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
   }
@@ -2990,7 +3000,7 @@ struct CompoundAssignSubobjectHandler {
     if (!SubobjType->isIntegerType() || !RHS.isInt()) {
       // We don't support compound assignment on integer-cast-to-pointer
       // values.
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
 
@@ -3018,7 +3028,7 @@ struct CompoundAssignSubobjectHandler {
 
     if (PointeeType.isNull() || !RHS.isInt() ||
         (Opcode != BO_Add && Opcode != BO_Sub)) {
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
 
@@ -3050,7 +3060,7 @@ static bool handleCompoundAssignment(
     return false;
 
   if (!Info.getLangOpts().CPlusPlus14) {
-    Info.Diag(E);
+    Info.FFDiag(E);
     return false;
   }
 
@@ -3072,7 +3082,7 @@ struct IncDecSubobjectHandler {
   bool checkConst(QualType QT) {
     // Assigning to a const object has undefined behavior.
     if (QT.isConstQualified()) {
-      Info.Diag(E, diag::note_constexpr_modify_const_type) << QT;
+      Info.FFDiag(E, diag::note_constexpr_modify_const_type) << QT;
       return false;
     }
     return true;
@@ -3104,7 +3114,7 @@ struct IncDecSubobjectHandler {
       return foundPointer(Subobj, SubobjType);
     default:
       // FIXME: can this happen?
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
   }
@@ -3115,7 +3125,7 @@ struct IncDecSubobjectHandler {
     if (!SubobjType->isIntegerType()) {
       // We don't support increment / decrement on integer-cast-to-pointer
       // values.
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
 
@@ -3174,7 +3184,7 @@ struct IncDecSubobjectHandler {
     if (const PointerType *PT = SubobjType->getAs<PointerType>())
       PointeeType = PT->getPointeeType();
     else {
-      Info.Diag(E);
+      Info.FFDiag(E);
       return false;
     }
 
@@ -3199,7 +3209,7 @@ static bool handleIncDec(EvalInfo &Info,
     return false;
 
   if (!Info.getLangOpts().CPlusPlus14) {
-    Info.Diag(E);
+    Info.FFDiag(E);
     return false;
   }
 
@@ -3221,7 +3231,7 @@ static bool EvaluateObjectArgument(EvalI
   if (Object->getType()->isLiteralType(Info.Ctx))
     return EvaluateTemporary(Object, This, Info);
 
-  Info.Diag(Object, diag::note_constexpr_nonliteral) << Object->getType();
+  Info.FFDiag(Object, diag::note_constexpr_nonliteral) << Object->getType();
   return false;
 }
 
@@ -3249,7 +3259,7 @@ static const ValueDecl *HandleMemberPoin
   // member value, the behavior is undefined.
   if (!MemPtr.getDecl()) {
     // FIXME: Specific diagnostic.
-    Info.Diag(RHS);
+    Info.FFDiag(RHS);
     return nullptr;
   }
 
@@ -3259,7 +3269,7 @@ static const ValueDecl *HandleMemberPoin
     // derived-to-base path for the member pointer.
     if (LV.Designator.MostDerivedPathLength + MemPtr.Path.size() >
         LV.Designator.Entries.size()) {
-      Info.Diag(RHS);
+      Info.FFDiag(RHS);
       return nullptr;
     }
     unsigned PathLengthToMember =
@@ -3269,7 +3279,7 @@ static const ValueDecl *HandleMemberPoin
           LV.Designator.Entries[PathLengthToMember + I]);
       const CXXRecordDecl *MPDecl = MemPtr.Path[I];
       if (LVDecl->getCanonicalDecl() != MPDecl->getCanonicalDecl()) {
-        Info.Diag(RHS);
+        Info.FFDiag(RHS);
         return nullptr;
       }
     }
@@ -3403,7 +3413,7 @@ static bool EvaluateDecl(EvalInfo &Info,
 
     const Expr *InitE = VD->getInit();
     if (!InitE) {
-      Info.Diag(D->getLocStart(), diag::note_constexpr_uninitialized)
+      Info.FFDiag(D->getLocStart(), diag::note_constexpr_uninitialized)
         << false << VD->getType();
       Val = APValue();
       return false;
@@ -3517,7 +3527,7 @@ static EvalStmtResult EvaluateSwitch(Stm
   case ESR_CaseNotFound:
     // This can only happen if the switch case is nested within a statement
     // expression. We have no intention of supporting that.
-    Info.Diag(Found->getLocStart(), diag::note_constexpr_stmt_expr_unsupported);
+    Info.FFDiag(Found->getLocStart(), diag::note_constexpr_stmt_expr_unsupported);
     return ESR_Failed;
   }
   llvm_unreachable("Invalid EvalStmtResult!");
@@ -3608,7 +3618,7 @@ static EvalStmtResult EvaluateStmt(StmtR
       return ESR_Succeeded;
     }
 
-    Info.Diag(S->getLocStart());
+    Info.FFDiag(S->getLocStart());
     return ESR_Failed;
 
   case Stmt::NullStmtClass:
@@ -3855,7 +3865,7 @@ static bool CheckConstexprFunction(EvalI
 
   if (Info.getLangOpts().CPlusPlus11) {
     const FunctionDecl *DiagDecl = Definition ? Definition : Declaration;
-
+    
     // If this function is not constexpr because it is an inherited
     // non-constexpr constructor, diagnose that directly.
     auto *CD = dyn_cast<CXXConstructorDecl>(DiagDecl);
@@ -3869,14 +3879,14 @@ static bool CheckConstexprFunction(EvalI
     // or an inheriting constructor, we should be much more explicit about why
     // it's not constexpr.
     if (CD && CD->isInheritingConstructor())
-      Info.Diag(CallLoc, diag::note_constexpr_invalid_inhctor, 1)
+      Info.FFDiag(CallLoc, diag::note_constexpr_invalid_inhctor, 1)
         << CD->getInheritedConstructor().getConstructor()->getParent();
     else
-      Info.Diag(CallLoc, diag::note_constexpr_invalid_function, 1)
+      Info.FFDiag(CallLoc, diag::note_constexpr_invalid_function, 1)
         << DiagDecl->isConstexpr() << (bool)CD << DiagDecl;
     Info.Note(DiagDecl->getLocation(), diag::note_declared_at);
   } else {
-    Info.Diag(CallLoc, diag::note_invalid_subexpr_in_const_expr);
+    Info.FFDiag(CallLoc, diag::note_invalid_subexpr_in_const_expr);
   }
   return false;
 }
@@ -3963,7 +3973,7 @@ static bool HandleFunctionCall(SourceLoc
   if (ESR == ESR_Succeeded) {
     if (Callee->getReturnType()->isVoidType())
       return true;
-    Info.Diag(Callee->getLocEnd(), diag::note_constexpr_no_return);
+    Info.FFDiag(Callee->getLocEnd(), diag::note_constexpr_no_return);
   }
   return ESR == ESR_Returned;
 }
@@ -3979,7 +3989,7 @@ static bool HandleConstructorCall(const
 
   const CXXRecordDecl *RD = Definition->getParent();
   if (RD->getNumVBases()) {
-    Info.Diag(CallLoc, diag::note_constexpr_virtual_base) << RD;
+    Info.FFDiag(CallLoc, diag::note_constexpr_virtual_base) << RD;
     return false;
   }
 
@@ -4199,7 +4209,7 @@ public:
   /// Report an evaluation error. This should only be called when an error is
   /// first discovered. When propagating an error, just return false.
   bool Error(const Expr *E, diag::kind D) {
-    Info.Diag(E, D);
+    Info.FFDiag(E, D);
     return false;
   }
   bool Error(const Expr *E) {
@@ -4524,7 +4534,7 @@ public:
       if (BI + 1 == BE) {
         const Expr *FinalExpr = dyn_cast<Expr>(*BI);
         if (!FinalExpr) {
-          Info.Diag((*BI)->getLocStart(),
+          Info.FFDiag((*BI)->getLocStart(),
                     diag::note_constexpr_stmt_expr_unsupported);
           return false;
         }
@@ -4539,7 +4549,7 @@ public:
         // 'break', or 'continue', it would be nice to propagate that to
         // the outer statement evaluation rather than bailing out.
         if (ESR != ESR_Failed)
-          Info.Diag((*BI)->getLocStart(),
+          Info.FFDiag((*BI)->getLocStart(),
                     diag::note_constexpr_stmt_expr_unsupported);
         return false;
       }
@@ -4787,7 +4797,7 @@ bool LValueExprEvaluator::VisitVarDecl(c
     return false;
   if (V->isUninit()) {
     if (!Info.checkingPotentialConstantExpression())
-      Info.Diag(E, diag::note_constexpr_use_uninit_reference);
+      Info.FFDiag(E, diag::note_constexpr_use_uninit_reference);
     return false;
   }
   return Success(*V, E);
@@ -4871,7 +4881,7 @@ bool LValueExprEvaluator::VisitCXXTypeid
   if (!E->isPotentiallyEvaluated())
     return Success(E);
 
-  Info.Diag(E, diag::note_constexpr_typeid_polymorphic)
+  Info.FFDiag(E, diag::note_constexpr_typeid_polymorphic)
     << E->getExprOperand()->getType()
     << E->getExprOperand()->getSourceRange();
   return false;
@@ -5039,9 +5049,9 @@ public:
       return false;
     if (!Info.CurrentCall->This) {
       if (Info.getLangOpts().CPlusPlus11)
-        Info.Diag(E, diag::note_constexpr_this) << E->isImplicit();
+        Info.FFDiag(E, diag::note_constexpr_this) << E->isImplicit();
       else
-        Info.Diag(E);
+        Info.FFDiag(E);
       return false;
     }
     Result = *Info.CurrentCall->This;
@@ -5491,7 +5501,7 @@ bool RecordExprEvaluator::ZeroInitializa
   }
 
   if (isa<CXXRecordDecl>(RD) && cast<CXXRecordDecl>(RD)->getNumVBases()) {
-    Info.Diag(E, diag::note_constexpr_virtual_base) << RD;
+    Info.FFDiag(E, diag::note_constexpr_virtual_base) << RD;
     return false;
   }
 
@@ -6313,7 +6323,7 @@ static bool EvaluateInteger(const Expr *
   if (!Val.isInt()) {
     // FIXME: It would be better to produce the diagnostic for casting
     //        a pointer to an integer.
-    Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+    Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
     return false;
   }
   Result = Val.getInt();
@@ -7663,7 +7673,7 @@ bool IntExprEvaluator::VisitBinaryOperat
         // C, array of zero length). Pointer subtraction in such cases has
         // undefined behavior, so is not constant.
         if (ElementSize.isZero()) {
-          Info.Diag(E, diag::note_constexpr_pointer_subtraction_zero_size)
+          Info.FFDiag(E, diag::note_constexpr_pointer_subtraction_zero_size)
             << ElementType;
           return false;
         }
@@ -9036,10 +9046,10 @@ static bool Evaluate(APValue &Result, Ev
     if (!EvaluateAtomic(E, Result, Info))
       return false;
   } else if (Info.getLangOpts().CPlusPlus11) {
-    Info.Diag(E, diag::note_constexpr_nonliteral) << E->getType();
+    Info.FFDiag(E, diag::note_constexpr_nonliteral) << E->getType();
     return false;
   } else {
-    Info.Diag(E, diag::note_invalid_subexpr_in_const_expr);
+    Info.FFDiag(E, diag::note_invalid_subexpr_in_const_expr);
     return false;
   }
 




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