diff --git a/docs/ClangCommandLineReference.rst b/docs/ClangCommandLineReference.rst
index b8b3407bfe03268e5962d9a77e210b57918e05cc..0e055c16802a52d4aee69713de3960cd3ae24eb4 100644
--- a/docs/ClangCommandLineReference.rst
+++ b/docs/ClangCommandLineReference.rst
@@ -2181,6 +2181,8 @@ X86
 
 .. option:: -mmmx, -mno-mmx
 
+.. option:: -mmpx, -mno-mpx
+
 .. option:: -mmwaitx, -mno-mwaitx
 
 .. option:: -mpclmul, -mno-pclmul
diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 3ac9283305e90bc3b2eb316ca9c956b9febd93d1..62bee0b4dd7751ed0adaf883d8a8939e7e17fd1d 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -1718,6 +1718,7 @@ def mno_pku : Flag<["-"], "mno-pku">, Group<m_x86_Features_Group>;
 def mno_clflushopt : Flag<["-"], "mno-clflushopt">, Group<m_x86_Features_Group>;
 def mno_clwb : Flag<["-"], "mno-clwb">, Group<m_x86_Features_Group>;
 def mno_movbe : Flag<["-"], "mno-movbe">, Group<m_x86_Features_Group>;
+def mno_mpx : Flag<["-"], "mno-mpx">, Group<m_x86_Features_Group>;
 
 def munaligned_access : Flag<["-"], "munaligned-access">, Group<m_arm_Features_Group>,
   HelpText<"Allow memory accesses to be unaligned (AArch32/AArch64 only)">;
@@ -1913,6 +1914,7 @@ def mmwaitx : Flag<["-"], "mmwaitx">, Group<m_x86_Features_Group>;
 def mclflushopt : Flag<["-"], "mclflushopt">, Group<m_x86_Features_Group>;
 def mclwb : Flag<["-"], "mclwb">, Group<m_x86_Features_Group>;
 def mmovbe : Flag<["-"], "mmovbe">, Group<m_x86_Features_Group>;
+def mmpx : Flag<["-"], "mmpx">, Group<m_x86_Features_Group>;
 def mips16 : Flag<["-"], "mips16">, Group<m_Group>;
 def mno_mips16 : Flag<["-"], "mno-mips16">, Group<m_Group>;
 def mmicromips : Flag<["-"], "mmicromips">, Group<m_Group>;
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 45ce531e7465dc907a077ec4db29cceeadbbfd72..6124bdb5fd9c8103054e6de18cb35eaf26d443ce 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -3881,6 +3881,8 @@ void X86TargetInfo::getTargetDefines(const LangOptions &Opts,
     Builder.defineMacro("__CLFLUSHOPT__");
   if (HasCLWB)
     Builder.defineMacro("__CLWB__");
+  if (HasMPX)
+    Builder.defineMacro("__MPX__");
 
   // Each case falls through to the previous one here.
   switch (SSELevel) {
diff --git a/test/Driver/x86-target-features.c b/test/Driver/x86-target-features.c
index d78bc28b8ba83d86ed9e9b3f9069defdc4f69de2..5d0c9faee74d507d16c712a535d1ef4439293b05 100644
--- a/test/Driver/x86-target-features.c
+++ b/test/Driver/x86-target-features.c
@@ -64,3 +64,8 @@
 // RUN: %clang -target i386-unknown-linux-gnu -march=i386 -mno-movbe %s -### -o %t.o 2>&1 | FileCheck -check-prefix=NO-MOVBE %s
 // MOVBE: "-target-feature" "+movbe"
 // NO-MOVBE: "-target-feature" "-movbe"
+
+// RUN: %clang -target i386-unknown-linux-gnu -march=i386 -mmpx %s -### -o %t.o 2>&1 | FileCheck -check-prefix=MPX %s
+// RUN: %clang -target i386-unknown-linux-gnu -march=i386 -mno-mpx %s -### -o %t.o 2>&1 | FileCheck -check-prefix=NO-MPX %s
+// MPX: "-target-feature" "+mpx"
+// NO-MPX: "-target-feature" "-mpx"
diff --git a/test/Preprocessor/predefined-arch-macros.c b/test/Preprocessor/predefined-arch-macros.c
index f32482297d8ffd83d16ecbdffbd9fb3db905ad61..0ead8eaefdce4c5b32b718bdf2980b3dbb35ebac 100644
--- a/test/Preprocessor/predefined-arch-macros.c
+++ b/test/Preprocessor/predefined-arch-macros.c
@@ -656,6 +656,7 @@
 // CHECK_SKL_M32: #define __FMA__ 1
 // CHECK_SKL_M32: #define __LZCNT__ 1
 // CHECK_SKL_M32: #define __MMX__ 1
+// CHECK_SKL_M32: #define __MPX__ 1
 // CHECK_SKL_M32: #define __PCLMUL__ 1
 // CHECK_SKL_M32: #define __POPCNT__ 1
 // CHECK_SKL_M32: #define __RDRND__ 1
@@ -687,6 +688,7 @@
 // CHECK_SKL_M64: #define __FMA__ 1
 // CHECK_SKL_M64: #define __LZCNT__ 1
 // CHECK_SKL_M64: #define __MMX__ 1
+// CHECK_SKL_M64: #define __MPX__ 1
 // CHECK_SKL_M64: #define __PCLMUL__ 1
 // CHECK_SKL_M64: #define __POPCNT__ 1
 // CHECK_SKL_M64: #define __RDRND__ 1
@@ -801,6 +803,7 @@
 // CHECK_SKX_M32: #define __FMA__ 1
 // CHECK_SKX_M32: #define __LZCNT__ 1
 // CHECK_SKX_M32: #define __MMX__ 1
+// CHECK_SKX_M32: #define __MPX__ 1
 // CHECK_SKX_M32: #define __PCLMUL__ 1
 // CHECK_SKX_M32: #define __POPCNT__ 1
 // CHECK_SKX_M32: #define __RDRND__ 1
@@ -841,6 +844,7 @@
 // CHECK_SKX_M64: #define __FMA__ 1
 // CHECK_SKX_M64: #define __LZCNT__ 1
 // CHECK_SKX_M64: #define __MMX__ 1
+// CHECK_SKX_M64: #define __MPX__ 1
 // CHECK_SKX_M64: #define __PCLMUL__ 1
 // CHECK_SKX_M64: #define __POPCNT__ 1
 // CHECK_SKX_M64: #define __RDRND__ 1
@@ -885,6 +889,7 @@
 // CHECK_CNL_M32: #define __FMA__ 1
 // CHECK_CNL_M32: #define __LZCNT__ 1
 // CHECK_CNL_M32: #define __MMX__ 1
+// CHECK_CNL_M32: #define __MPX__ 1
 // CHECK_CNL_M32: #define __PCLMUL__ 1
 // CHECK_CNL_M32: #define __POPCNT__ 1
 // CHECK_CNL_M32: #define __RDRND__ 1
@@ -924,6 +929,7 @@
 // CHECK_CNL_M64: #define __FMA__ 1
 // CHECK_CNL_M64: #define __LZCNT__ 1
 // CHECK_CNL_M64: #define __MMX__ 1
+// CHECK_CNL_M64: #define __MPX__ 1
 // CHECK_CNL_M64: #define __PCLMUL__ 1
 // CHECK_CNL_M64: #define __POPCNT__ 1
 // CHECK_CNL_M64: #define __RDRND__ 1