diff --git a/llvm/include/llvm/IR/Intrinsics.td b/llvm/include/llvm/IR/Intrinsics.td
--- a/llvm/include/llvm/IR/Intrinsics.td
+++ b/llvm/include/llvm/IR/Intrinsics.td
@@ -134,10 +134,14 @@
 // Parallels the cold attribute on LLVM IR functions.
 def IntrCold : IntrinsicProperty;
 
-// IntrNoduplicate - Calls to this intrinsic cannot be duplicated.
+// IntrNoDuplicate - Calls to this intrinsic cannot be duplicated.
 // Parallels the noduplicate attribute on LLVM IR functions.
 def IntrNoDuplicate : IntrinsicProperty;
 
+// IntrNoMerge - Calls to this intrinsic cannot be merged
+// Parallels the nomerge attribute on LLVM IR functions.
+def IntrNoMerge : IntrinsicProperty;
+
 // IntrConvergent - Calls to this intrinsic are convergent and may not be made
 // control-dependent on any additional values.
 // Parallels the convergent attribute on LLVM IR functions.
diff --git a/llvm/test/TableGen/intrin-properties.td b/llvm/test/TableGen/intrin-properties.td
new file mode 100644
--- /dev/null
+++ b/llvm/test/TableGen/intrin-properties.td
@@ -0,0 +1,24 @@
+// RUN: sed -e 's/<PROP>/ArgMemOnly/;s/<ATTR>/ArgMemOnly/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/Cold/;s/<ATTR>/Cold/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/Convergent/;s/<ATTR>/Convergent/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/InaccessibleMemOnly/;s/<ATTR>/InaccessibleMemOnly/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/InaccessibleMemOrArgMemOnly/;s/<ATTR>/InaccessibleMemOrArgMemOnly/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/NoDuplicate/;s/<ATTR>/NoDuplicate/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/NoFree/;s/<ATTR>/NoFree/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/NoMem/;s/<ATTR>/ReadNone/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/NoMerge/;s/<ATTR>/NoMerge/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/NoReturn/;s/<ATTR>/NoReturn/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/NoSync/;s/<ATTR>/NoSync/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/ReadMem/;s/<ATTR>/ReadOnly/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/Speculatable/;s/<ATTR>/Speculatable/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/WillReturn/;s/<ATTR>/WillReturn/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+// RUN: sed -e 's/<PROP>/WriteMem/;s/<ATTR>/WriteOnly/' < %s > %t; llvm-tblgen -gen-intrinsic-impl -I %p/../../include %t | FileCheck %t
+
+include "llvm/IR/Intrinsics.td"
+
+// CHECK: [[I:[0-9]+]], // llvm.tgtest.Intr<PROP>
+// CHECK: case [[I]]:
+// CHECK-NEXT: Atts[] = {{.*}}Attribute::<ATTR>
+def int_tgtest_Intr<PROP>:
+  Intrinsic<[llvm_i32_ty], [llvm_ptr_ty], [Intr<PROP>]>;
+
diff --git a/llvm/utils/TableGen/CodeGenIntrinsics.h b/llvm/utils/TableGen/CodeGenIntrinsics.h
--- a/llvm/utils/TableGen/CodeGenIntrinsics.h
+++ b/llvm/utils/TableGen/CodeGenIntrinsics.h
@@ -120,6 +120,9 @@
   /// True if the intrinsic is marked as noduplicate.
   bool isNoDuplicate;
 
+  /// True if the intrinsic is marked as nomerge.
+  bool isNoMerge;
+
   /// True if the intrinsic is no-return.
   bool isNoReturn;
 
diff --git a/llvm/utils/TableGen/CodeGenTarget.cpp b/llvm/utils/TableGen/CodeGenTarget.cpp
--- a/llvm/utils/TableGen/CodeGenTarget.cpp
+++ b/llvm/utils/TableGen/CodeGenTarget.cpp
@@ -656,6 +656,7 @@
   isWillReturn = false;
   isCold = false;
   isNoDuplicate = false;
+  isNoMerge = false;
   isConvergent = false;
   isSpeculatable = false;
   hasSideEffects = false;
@@ -845,6 +846,8 @@
     canThrow = true;
   else if (R->getName() == "IntrNoDuplicate")
     isNoDuplicate = true;
+  else if (R->getName() == "IntrNoMerge")
+    isNoMerge = true;
   else if (R->getName() == "IntrConvergent")
     isConvergent = true;
   else if (R->getName() == "IntrNoReturn")
diff --git a/llvm/utils/TableGen/IntrinsicEmitter.cpp b/llvm/utils/TableGen/IntrinsicEmitter.cpp
--- a/llvm/utils/TableGen/IntrinsicEmitter.cpp
+++ b/llvm/utils/TableGen/IntrinsicEmitter.cpp
@@ -584,6 +584,9 @@
     if (L->isNoDuplicate != R->isNoDuplicate)
       return R->isNoDuplicate;
 
+    if (L->isNoMerge != R->isNoMerge)
+      return R->isNoMerge;
+
     if (L->isNoReturn != R->isNoReturn)
       return R->isNoReturn;
 
@@ -739,7 +742,8 @@
          !intrinsic.hasSideEffects) ||
         intrinsic.isNoReturn || intrinsic.isNoSync || intrinsic.isNoFree ||
         intrinsic.isWillReturn || intrinsic.isCold || intrinsic.isNoDuplicate ||
-        intrinsic.isConvergent || intrinsic.isSpeculatable) {
+        intrinsic.isNoMerge || intrinsic.isConvergent ||
+        intrinsic.isSpeculatable) {
       OS << "      const Attribute::AttrKind Atts[] = {";
       ListSeparator LS(",");
       if (!intrinsic.canThrow)
@@ -756,6 +760,8 @@
         OS << LS << "Attribute::Cold";
       if (intrinsic.isNoDuplicate)
         OS << LS << "Attribute::NoDuplicate";
+      if (intrinsic.isNoMerge)
+        OS << LS << "Attribute::NoMerge";
       if (intrinsic.isConvergent)
         OS << LS << "Attribute::Convergent";
       if (intrinsic.isSpeculatable)