diff --git a/include/llvm/Instructions.h b/include/llvm/Instructions.h
index 877e46fe9f9..a1a2bd53c82 100644
--- a/include/llvm/Instructions.h
+++ b/include/llvm/Instructions.h
@@ -1280,50 +1280,56 @@ public:
 
   /// @brief Return true if the call should not be inlined.
   bool isNoInline() const { return hasFnAttr(Attributes::NoInline); }
-  void setIsNoInline(bool Value = true) {
-    if (Value) addAttribute(~0, Attribute::NoInline);
-    else removeAttribute(~0, Attribute::NoInline);
+  void setIsNoInline() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::NoInline);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Return true if the call can return twice
   bool canReturnTwice() const {
     return hasFnAttr(Attributes::ReturnsTwice);
   }
-  void setCanReturnTwice(bool Value = true) {
-    if (Value) addAttribute(~0, Attribute::ReturnsTwice);
-    else removeAttribute(~0, Attribute::ReturnsTwice);
+  void setCanReturnTwice() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::ReturnsTwice);
+    addAttribute(~0U, Attributes::get(B));
   }
 
   /// @brief Determine if the call does not access memory.
   bool doesNotAccessMemory() const {
     return hasFnAttr(Attributes::ReadNone);
   }
-  void setDoesNotAccessMemory(bool NotAccessMemory = true) {
-    if (NotAccessMemory) addAttribute(~0, Attribute::ReadNone);
-    else removeAttribute(~0, Attribute::ReadNone);
+  void setDoesNotAccessMemory() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::ReadNone);
+    addAttribute(~0U, Attributes::get(B));
   }
 
   /// @brief Determine if the call does not access or only reads memory.
   bool onlyReadsMemory() const {
     return doesNotAccessMemory() || hasFnAttr(Attributes::ReadOnly);
   }
-  void setOnlyReadsMemory(bool OnlyReadsMemory = true) {
-    if (OnlyReadsMemory) addAttribute(~0, Attribute::ReadOnly);
-    else removeAttribute(~0, Attribute::ReadOnly | Attribute::ReadNone);
+  void setOnlyReadsMemory() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::ReadOnly);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call cannot return.
   bool doesNotReturn() const { return hasFnAttr(Attributes::NoReturn); }
-  void setDoesNotReturn(bool DoesNotReturn = true) {
-    if (DoesNotReturn) addAttribute(~0, Attribute::NoReturn);
-    else removeAttribute(~0, Attribute::NoReturn);
+  void setDoesNotReturn() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::NoReturn);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call cannot unwind.
   bool doesNotThrow() const { return hasFnAttr(Attributes::NoUnwind); }
   void setDoesNotThrow(bool DoesNotThrow = true) {
-    if (DoesNotThrow) addAttribute(~0, Attribute::NoUnwind);
-    else removeAttribute(~0, Attribute::NoUnwind);
+    Attributes::Builder B;
+    B.addAttribute(Attributes::NoUnwind);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call returns a structure through first
@@ -3043,41 +3049,46 @@ public:
 
   /// @brief Return true if the call should not be inlined.
   bool isNoInline() const { return hasFnAttr(Attributes::NoInline); }
-  void setIsNoInline(bool Value = true) {
-    if (Value) addAttribute(~0, Attribute::NoInline);
-    else removeAttribute(~0, Attribute::NoInline);
+  void setIsNoInline() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::NoInline);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call does not access memory.
   bool doesNotAccessMemory() const {
     return hasFnAttr(Attributes::ReadNone);
   }
-  void setDoesNotAccessMemory(bool NotAccessMemory = true) {
-    if (NotAccessMemory) addAttribute(~0, Attribute::ReadNone);
-    else removeAttribute(~0, Attribute::ReadNone);
+  void setDoesNotAccessMemory() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::ReadNone);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call does not access or only reads memory.
   bool onlyReadsMemory() const {
     return doesNotAccessMemory() || hasFnAttr(Attributes::ReadOnly);
   }
-  void setOnlyReadsMemory(bool OnlyReadsMemory = true) {
-    if (OnlyReadsMemory) addAttribute(~0, Attribute::ReadOnly);
-    else removeAttribute(~0, Attribute::ReadOnly | Attribute::ReadNone);
+  void setOnlyReadsMemory() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::ReadOnly);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call cannot return.
   bool doesNotReturn() const { return hasFnAttr(Attributes::NoReturn); }
-  void setDoesNotReturn(bool DoesNotReturn = true) {
-    if (DoesNotReturn) addAttribute(~0, Attribute::NoReturn);
-    else removeAttribute(~0, Attribute::NoReturn);
+  void setDoesNotReturn() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::NoReturn);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call cannot unwind.
   bool doesNotThrow() const { return hasFnAttr(Attributes::NoUnwind); }
-  void setDoesNotThrow(bool DoesNotThrow = true) {
-    if (DoesNotThrow) addAttribute(~0, Attribute::NoUnwind);
-    else removeAttribute(~0, Attribute::NoUnwind);
+  void setDoesNotThrow() {
+    Attributes::Builder B;
+    B.addAttribute(Attributes::NoUnwind);
+    addAttribute(~0, Attributes::get(B));
   }
 
   /// @brief Determine if the call returns a structure through first
diff --git a/include/llvm/Support/CallSite.h b/include/llvm/Support/CallSite.h
index 1b258976469..ad8d6d41fc4 100644
--- a/include/llvm/Support/CallSite.h
+++ b/include/llvm/Support/CallSite.h
@@ -211,32 +211,32 @@ public:
   bool doesNotAccessMemory() const {
     CALLSITE_DELEGATE_GETTER(doesNotAccessMemory());
   }
-  void setDoesNotAccessMemory(bool doesNotAccessMemory = true) {
-    CALLSITE_DELEGATE_SETTER(setDoesNotAccessMemory(doesNotAccessMemory));
+  void setDoesNotAccessMemory() {
+    CALLSITE_DELEGATE_SETTER(setDoesNotAccessMemory());
   }
 
   /// @brief Determine if the call does not access or only reads memory.
   bool onlyReadsMemory() const {
     CALLSITE_DELEGATE_GETTER(onlyReadsMemory());
   }
-  void setOnlyReadsMemory(bool onlyReadsMemory = true) {
-    CALLSITE_DELEGATE_SETTER(setOnlyReadsMemory(onlyReadsMemory));
+  void setOnlyReadsMemory() {
+    CALLSITE_DELEGATE_SETTER(setOnlyReadsMemory());
   }
 
   /// @brief Determine if the call cannot return.
   bool doesNotReturn() const {
     CALLSITE_DELEGATE_GETTER(doesNotReturn());
   }
-  void setDoesNotReturn(bool doesNotReturn = true) {
-    CALLSITE_DELEGATE_SETTER(setDoesNotReturn(doesNotReturn));
+  void setDoesNotReturn() {
+    CALLSITE_DELEGATE_SETTER(setDoesNotReturn());
   }
 
   /// @brief Determine if the call cannot unwind.
   bool doesNotThrow() const {
     CALLSITE_DELEGATE_GETTER(doesNotThrow());
   }
-  void setDoesNotThrow(bool doesNotThrow = true) {
-    CALLSITE_DELEGATE_SETTER(setDoesNotThrow(doesNotThrow));
+  void setDoesNotThrow() {
+    CALLSITE_DELEGATE_SETTER(setDoesNotThrow());
   }
 
 #undef CALLSITE_DELEGATE_GETTER