The value of a const weak variable is not an integer constant.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147575 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 20 insertions, 1 deletions

diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index 479f80f1dd..468baae205 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -1422,6 +1422,10 @@ bool VarDecl::evaluateValue(
 }
 
 bool VarDecl::checkInitIsICE() const {
+  // Initializers of weak variables are never ICEs.
+  if (isWeak())
+    return false;
+
   EvaluatedStmt *Eval = ensureEvaluatedStmt();
   if (Eval->CheckedICE)
     // We have already checked whether this subexpression is an
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index 43c9af58bc..f82026f89f 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -6045,7 +6045,7 @@ void Sema::AddInitializerToDecl(Decl *RealDecl, Expr *Init,
   // If the type changed, it means we had an incomplete type that was
   // completed by the initializer. For example:
   //   int ary[] = { 1, 3, 5 };
-  // "ary" transitions from a VariableArrayType to a ConstantArrayType.
+  // "ary" transitions from an IncompleteArrayType to a ConstantArrayType.
   if (!VDecl->isInvalidDecl() && (DclT != SavT)) {
     VDecl->setType(DclT);
     Init->setType(DclT.getNonReferenceType());
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index 7a28a44823..bcb624be89 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -2427,6 +2427,7 @@ bool InitializationSequence::isAmbiguous() const {
   case FK_ArrayTypeMismatch:
   case FK_NonConstantArrayInit:
   case FK_ListInitializationFailed:
+  case FK_VariableLengthArrayHasInitializer:
   case FK_PlaceholderType:
     return false;
 
@@ -4060,6 +4061,11 @@ InitializationSequence::InitializationSequence(Sema &S,
   //     - Otherwise, if the destination type is an array, the program is
   //       ill-formed.
   if (const ArrayType *DestAT = Context.getAsArrayType(DestType)) {
+    if (Initializer && isa<VariableArrayType>(DestAT)) {
+      SetFailed(FK_VariableLengthArrayHasInitializer);
+      return;
+    }
+
     if (Initializer && IsStringInit(Initializer, DestAT, Context)) {
       TryStringLiteralInitialization(S, Entity, Kind, Initializer, *this);
       return;
@@ -5277,6 +5283,11 @@ bool InitializationSequence::Diagnose(Sema &S,
       << Args[0]->getSourceRange();
     break;
 
+  case FK_VariableLengthArrayHasInitializer:
+    S.Diag(Kind.getLocation(), diag::err_variable_object_no_init)
+      << Args[0]->getSourceRange();
+    break;
+
   case FK_AddressOfOverloadFailed: {
     DeclAccessPair Found;
     S.ResolveAddressOfOverloadedFunction(Args[0],
@@ -5659,6 +5670,10 @@ void InitializationSequence::dump(raw_ostream &OS) const {
       OS << "list initialization checker failure";
       break;
 
+    case FK_VariableLengthArrayHasInitializer:
+      OS << "variable length array has an initializer";
+      break;
+
     case FK_PlaceholderType:
       OS << "initializer expression isn't contextually valid";
       break;