Index: source/Commands/CommandObjectReproducer.cpp
===================================================================
--- source/Commands/CommandObjectReproducer.cpp
+++ source/Commands/CommandObjectReproducer.cpp
@@ -67,12 +67,11 @@
     }
 
     auto &r = repro::Reproducer::Instance();
-    if (auto generator = r.GetGenerator()) {
+    if (r.GetGenerator()) {
       result.GetOutputStream() << "Reproducer is in capture mode.\n";
-    } else if (auto generator = r.GetLoader()) {
+    } else if (r.GetLoader()) {
       result.GetOutputStream() << "Reproducer is in replay mode.\n";
     } else {
-
       result.GetOutputStream() << "Reproducer is off.\n";
     }
 
Index: source/Plugins/Language/ObjC/Cocoa.cpp
===================================================================
--- source/Plugins/Language/ObjC/Cocoa.cpp
+++ source/Plugins/Language/ObjC/Cocoa.cpp
@@ -754,7 +754,7 @@
     uint64_t fraction:52;  // unsigned
     uint64_t exponent:11;  // signed
     uint64_t sign:1;
-  };
+  } repr;
   uint64_t i;
   double d;
 } DoubleBits;
@@ -764,7 +764,7 @@
     uint64_t exponent:7;   // signed
     uint64_t sign:1;
     uint64_t unused:4;  // placeholder for pointer tag bits
-  };
+  } repr;
   uint64_t i;
 } TaggedDoubleBits;
 
@@ -786,10 +786,10 @@
 
   // Sign and fraction are represented exactly.
   // Exponent is encoded.
-  assert(encodedBits.unused == 0);
-  decodedBits.sign = encodedBits.sign;
-  decodedBits.fraction = encodedBits.fraction;
-  decodedBits.exponent = decodeExponent(encodedBits.exponent);
+  assert(encodedBits.repr.unused == 0);
+  decodedBits.repr.sign = encodedBits.repr.sign;
+  decodedBits.repr.fraction = encodedBits.repr.fraction;
+  decodedBits.repr.exponent = decodeExponent(encodedBits.repr.exponent);
 
   return decodedBits.d;
 }
Index: source/Plugins/Language/ObjC/NSArray.cpp
===================================================================
--- source/Plugins/Language/ObjC/NSArray.cpp
+++ source/Plugins/Language/ObjC/NSArray.cpp
@@ -171,13 +171,8 @@
     PtrType _data;
     uint32_t _offset;
     uint32_t _size;
-    union {
-      PtrType _mutations;
-      struct {
-        uint32_t _muts;
-        uint32_t _used;
-      };
-    };
+    uint32_t _muts;
+    uint32_t _used;
   };
     
   using NSArrayMSyntheticFrontEnd =
Index: source/Plugins/Language/ObjC/NSDictionary.cpp
===================================================================
--- source/Plugins/Language/ObjC/NSDictionary.cpp
+++ source/Plugins/Language/ObjC/NSDictionary.cpp
@@ -281,18 +281,11 @@
   
   struct DataDescriptor_32 {
     uint32_t _buffer;
-    union {
-      struct {
-        uint32_t _mutations;
-      };
-      struct {
-        uint32_t _muts;
-        uint32_t _used:25;
-        uint32_t _kvo:1;
-        uint32_t _szidx:6;
-      };
-    };
-    
+    uint32_t _muts;
+    uint32_t _used : 25;
+    uint32_t _kvo : 1;
+    uint32_t _szidx : 6;
+
     uint64_t GetSize() {
       return (_szidx) >= NSDictionaryNumSizeBuckets ?
           0 : NSDictionaryCapacities[_szidx];
@@ -301,18 +294,11 @@
   
   struct DataDescriptor_64 {
     uint64_t _buffer;
-    union {
-      struct {
-        uint64_t _mutations;
-      };
-      struct {
-        uint32_t _muts;
-        uint32_t _used:25;
-        uint32_t _kvo:1;
-        uint32_t _szidx:6;
-      };
-    };
-    
+    uint32_t _muts;
+    uint32_t _used : 25;
+    uint32_t _kvo : 1;
+    uint32_t _szidx : 6;
+
     uint64_t GetSize() {
       return (_szidx) >= NSDictionaryNumSizeBuckets ?
           0 : NSDictionaryCapacities[_szidx];
Index: source/Plugins/Language/ObjC/NSSet.cpp
===================================================================
--- source/Plugins/Language/ObjC/NSSet.cpp
+++ source/Plugins/Language/ObjC/NSSet.cpp
@@ -154,28 +154,18 @@
     uint32_t _cow;
     // __table storage
     uint32_t _objs_addr;
-    union {
-      uint32_t _mutations;
-      struct {
-        uint32_t _muts;
-        uint32_t _used : 26;
-        uint32_t _szidx : 6;
-      };
-    };
+    uint32_t _muts;
+    uint32_t _used : 26;
+    uint32_t _szidx : 6;
   };
   
   struct DataDescriptor_64 {
     uint64_t _cow;
     // __Table storage
     uint64_t _objs_addr;
-    union {
-      uint64_t _mutations;
-      struct {
-        uint32_t _muts;
-        uint32_t _used : 26;
-        uint32_t _szidx : 6;
-      };
-    };
+    uint32_t _muts;
+    uint32_t _used : 26;
+    uint32_t _szidx : 6;
   };
   
   using NSSetMSyntheticFrontEnd =
Index: source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
===================================================================
--- source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -1263,7 +1263,7 @@
 
 void GDBRemoteCommunication::SetHistoryStream(llvm::raw_ostream *strm) {
   m_history.SetStream(strm);
-};
+}
 
 llvm::Error
 GDBRemoteCommunication::ConnectLocally(GDBRemoteCommunication &client,
Index: source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
===================================================================
--- source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
+++ source/Plugins/SymbolFile/DWARF/DWARFASTParserClang.cpp
@@ -1663,7 +1663,6 @@
         dwarf->GetDIEToType()[die.GetDIE()] = DIE_IS_BEING_PARSED;
 
         DWARFFormValue type_die_form;
-        int64_t first_index = 0;
         uint32_t byte_stride = 0;
         uint32_t bit_stride = 0;
         bool is_vector = false;
@@ -1733,7 +1732,6 @@
           if (element_type) {
             auto array_info = ParseChildArrayInfo(die);
             if (array_info) {
-              first_index = array_info->first_index;
               byte_stride = array_info->byte_stride;
               bit_stride = array_info->bit_stride;
             }