Incomplete enum types not to be treated as integer type

when checking for integer signed/unsigned-ness. PR8694,
// rdar://8707031


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120345 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 4 deletions

diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
index 3c9561cd44..56cd4dddb5 100644
--- a/lib/AST/Type.cpp
+++ b/lib/AST/Type.cpp
@@ -489,8 +489,12 @@ bool Type::isSignedIntegerType() const {
            BT->getKind() <= BuiltinType::Int128;
   }
 
-  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
-    return ET->getDecl()->getIntegerType()->isSignedIntegerType();
+  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
+    // Incomplete enum types are not treated as integer types.
+    // FIXME: In C++, enum types are never integer types.
+    if (ET->getDecl()->isComplete())
+      return ET->getDecl()->getIntegerType()->isSignedIntegerType();
+  }
 
   return false;
 }
@@ -511,8 +515,12 @@ bool Type::isUnsignedIntegerType() const {
            BT->getKind() <= BuiltinType::UInt128;
   }
 
-  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType))
-    return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
+  if (const EnumType *ET = dyn_cast<EnumType>(CanonicalType)) {
+    // Incomplete enum types are not treated as integer types.
+    // FIXME: In C++, enum types are never integer types.
+    if (ET->getDecl()->isComplete())
+      return ET->getDecl()->getIntegerType()->isUnsignedIntegerType();
+  }
 
   return false;
 }