diff --git a/llvm/test/CMakeLists.txt b/llvm/test/CMakeLists.txt
--- a/llvm/test/CMakeLists.txt
+++ b/llvm/test/CMakeLists.txt
@@ -89,6 +89,7 @@
           llvm-rc
           llvm-readobj
           llvm-readelf
+          llvm-reduce
           llvm-rtdyld
           llvm-size
           llvm-split
diff --git a/llvm/tools/llvm-reduce/deltas/Delta.h b/llvm/tools/llvm-reduce/deltas/Delta.h
--- a/llvm/tools/llvm-reduce/deltas/Delta.h
+++ b/llvm/tools/llvm-reduce/deltas/Delta.h
@@ -28,8 +28,8 @@
 using namespace llvm;
 
 struct Chunk {
-  int begin;
-  int end;
+  unsigned begin;
+  unsigned end;
 
   /// Operator when populating CurrentChunks in Generic Delta Pass
   friend bool operator!=(const Chunk &C1, const Chunk &C2) {
@@ -66,7 +66,7 @@
 /// Other implementations of the Delta Debugging algorithm can also be found in
 /// the CReduce, Delta, and Lithium projects.
 void runDeltaPass(
-    TestRunner &Test, int Targets,
+    TestRunner &Test, unsigned Targets,
     std::function<std::unique_ptr<Module>(std::vector<Chunk>, Module *)>
         ExtractChunksFromModule);
 
diff --git a/llvm/tools/llvm-reduce/deltas/Delta.cpp b/llvm/tools/llvm-reduce/deltas/Delta.cpp
--- a/llvm/tools/llvm-reduce/deltas/Delta.cpp
+++ b/llvm/tools/llvm-reduce/deltas/Delta.cpp
@@ -85,7 +85,7 @@
     if (C.end - C.begin == 0)
       NewChunks.push_back(C);
     else {
-      int Half = (C.begin + C.end) / 2;
+      unsigned Half = (C.begin + C.end) / 2;
       NewChunks.push_back({C.begin, Half});
       NewChunks.push_back({Half + 1, C.end});
       SplitOne = true;
@@ -100,7 +100,7 @@
 }
 
 void llvm::runDeltaPass(
-    TestRunner &Test, int Targets,
+    TestRunner &Test, unsigned Targets,
     std::function<std::unique_ptr<Module>(std::vector<Chunk>, Module *)>
         ExtractChunksFromModule) {
   if (!Targets)
diff --git a/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp b/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp
--- a/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp
+++ b/llvm/tools/llvm-reduce/deltas/RemoveFunctions.cpp
@@ -23,7 +23,7 @@
 
   // Get functions inside desired chunks
   std::set<Function *> FuncsToKeep;
-  int I = 0, FunctionCount = 1;
+  unsigned I = 0, FunctionCount = 1;
   for (auto &F : *Clone) {
     if (!F.isDeclaration() && I < ChunksToKeep.size()) {
       if (FunctionCount >= ChunksToKeep[I].begin &&
diff --git a/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp b/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp
--- a/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp
+++ b/llvm/tools/llvm-reduce/deltas/RemoveGlobalVars.cpp
@@ -21,7 +21,7 @@
 
   // Get GVs inside desired chunks
   std::set<GlobalVariable *> GVsToKeep;
-  int I = 0, GVCount = 1;
+  unsigned I = 0, GVCount = 1;
   for (auto &GV : Clone->globals()) {
     if (GV.hasInitializer() && I < ChunksToKeep.size()) {
       if (GVCount >= ChunksToKeep[I].begin && GVCount <= ChunksToKeep[I].end)