Index: include/llvm/ADT/SmallBitVector.h
===================================================================
--- include/llvm/ADT/SmallBitVector.h
+++ include/llvm/ADT/SmallBitVector.h
@@ -553,17 +553,12 @@
 private:
   template<bool AddBits, bool InvertMask>
   void applyMask(const uint32_t *Mask, unsigned MaskWords) {
-    if (NumBaseBits == 64 && MaskWords >= 2) {
-      uint64_t M = Mask[0] | (uint64_t(Mask[1]) << 32);
-      if (InvertMask) M = ~M;
-      if (AddBits) setSmallBits(getSmallBits() | M);
-      else         setSmallBits(getSmallBits() & ~M);
-    } else {
-      uint32_t M = Mask[0];
-      if (InvertMask) M = ~M;
-      if (AddBits) setSmallBits(getSmallBits() | M);
-      else         setSmallBits(getSmallBits() & ~M);
-    }
+    uintptr_t M = Mask[0];
+    if (NumBaseBits == 64 && MaskWords >= 2)
+      M |= uintptr_t(Mask[1]) << 32;
+    if (InvertMask) M = ~M;
+    if (AddBits) setSmallBits(getSmallBits() | M);
+    else         setSmallBits(getSmallBits() & ~M);
   }
 };
 
Index: lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- lib/Target/X86/X86ISelLowering.cpp
+++ lib/Target/X86/X86ISelLowering.cpp
@@ -4955,7 +4955,7 @@
       return SDValue();
     if ((Offset % RequiredAlign) & 3)
       return SDValue();
-    int64_t StartOffset = Offset & ~(RequiredAlign-1);
+    int64_t StartOffset = Offset & ~int64_t(RequiredAlign-1);
     if (StartOffset) {
       SDLoc DL(Ptr);
       Ptr = DAG.getNode(ISD::ADD, DL, Ptr.getValueType(), Ptr,
Index: lib/Transforms/Instrumentation/ThreadSanitizer.cpp
===================================================================
--- lib/Transforms/Instrumentation/ThreadSanitizer.cpp
+++ lib/Transforms/Instrumentation/ThreadSanitizer.cpp
@@ -142,7 +142,7 @@
       M.getOrInsertFunction("__tsan_func_exit", IRB.getVoidTy(), nullptr));
   OrdTy = IRB.getInt32Ty();
   for (size_t i = 0; i < kNumberOfAccessSizes; ++i) {
-    const size_t ByteSize = 1 << i;
+    const size_t ByteSize = size_t(1 << i);
     const size_t BitSize = ByteSize * 8;
     SmallString<32> ReadName("__tsan_read" + itostr(ByteSize));
     TsanRead[i] = checkSanitizerInterfaceFunction(M.getOrInsertFunction(
@@ -513,7 +513,7 @@
     int Idx = getMemoryAccessFuncIndex(Addr, DL);
     if (Idx < 0)
       return false;
-    const size_t ByteSize = 1 << Idx;
+    const size_t ByteSize = size_t(1 << Idx);
     const size_t BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
@@ -527,7 +527,7 @@
     int Idx = getMemoryAccessFuncIndex(Addr, DL);
     if (Idx < 0)
       return false;
-    const size_t ByteSize = 1 << Idx;
+    const size_t ByteSize = size_t(1 << Idx);
     const size_t BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
@@ -544,7 +544,7 @@
     Function *F = TsanAtomicRMW[RMWI->getOperation()][Idx];
     if (!F)
       return false;
-    const size_t ByteSize = 1 << Idx;
+    const size_t ByteSize = size_t(1 << Idx);
     const size_t BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();
@@ -558,7 +558,7 @@
     int Idx = getMemoryAccessFuncIndex(Addr, DL);
     if (Idx < 0)
       return false;
-    const size_t ByteSize = 1 << Idx;
+    const size_t ByteSize = size_t(1 << Idx);
     const size_t BitSize = ByteSize * 8;
     Type *Ty = Type::getIntNTy(IRB.getContext(), BitSize);
     Type *PtrTy = Ty->getPointerTo();