diff --git a/clang/lib/Sema/ParsedAttr.cpp b/clang/lib/Sema/ParsedAttr.cpp
--- a/clang/lib/Sema/ParsedAttr.cpp
+++ b/clang/lib/Sema/ParsedAttr.cpp
@@ -111,7 +111,7 @@
 
 const ParsedAttrInfo &ParsedAttrInfo::get(const AttributeCommonInfo &A) {
   // If we have a ParsedAttrInfo for this ParsedAttr then return that.
-  if (A.getParsedKind() < llvm::array_lengthof(AttrInfoMap))
+  if ((size_t)A.getParsedKind() < llvm::array_lengthof(AttrInfoMap))
     return *AttrInfoMap[A.getParsedKind()];
 
   // If this is an ignored attribute then return an appropriate ParsedAttrInfo.
diff --git a/llvm/lib/ProfileData/InstrProfReader.cpp b/llvm/lib/ProfileData/InstrProfReader.cpp
--- a/llvm/lib/ProfileData/InstrProfReader.cpp
+++ b/llvm/lib/ProfileData/InstrProfReader.cpp
@@ -423,11 +423,11 @@
 
   // Check bounds. Note that the counter pointer embedded in the data record
   // may itself be corrupt.
-  if (NumCounters > MaxNumCounters)
+  if (MaxNumCounters < 0 || NumCounters > (uint32_t)MaxNumCounters)
     return error(instrprof_error::malformed);
   ptrdiff_t CounterOffset = getCounterOffset(CounterPtr);
   if (CounterOffset < 0 || CounterOffset > MaxNumCounters ||
-      (CounterOffset + NumCounters) > MaxNumCounters)
+      ((uint32_t)CounterOffset + NumCounters) > (uint32_t)MaxNumCounters)
     return error(instrprof_error::malformed);
 
   auto RawCounts = makeArrayRef(getCounter(CounterOffset), NumCounters);