diff --git a/clang/include/clang/Basic/LangOptions.def b/clang/include/clang/Basic/LangOptions.def
--- a/clang/include/clang/Basic/LangOptions.def
+++ b/clang/include/clang/Basic/LangOptions.def
@@ -224,7 +224,7 @@
 LANGOPT(OpenCLCPlusPlus   , 1, 0, "C++ for OpenCL")
 LANGOPT(OpenCLCPlusPlusVersion     , 32, 0, "C++ for OpenCL version")
 LANGOPT(OpenCLGenericAddressSpace, 1, 0, "OpenCL generic keyword")
-LANGOPT(OpenCLPipe               , 1, 0, "OpenCL pipe keyword")
+LANGOPT(OpenCLPipes              , 1, 0, "OpenCL pipes language constructs and built-ins")
 LANGOPT(NativeHalfType    , 1, 0, "Native half type support")
 LANGOPT(NativeHalfArgsAndReturns, 1, 0, "Native half args and returns")
 LANGOPT(HalfArgsAndReturns, 1, 0, "half args and returns")
diff --git a/clang/lib/Basic/OpenCLOptions.cpp b/clang/lib/Basic/OpenCLOptions.cpp
--- a/clang/lib/Basic/OpenCLOptions.cpp
+++ b/clang/lib/Basic/OpenCLOptions.cpp
@@ -112,7 +112,8 @@
   // supported.
   static const llvm::StringMap<llvm::StringRef> DependentFeaturesMap = {
       {"__opencl_c_read_write_images", "__opencl_c_images"},
-      {"__opencl_c_3d_image_writes", "__opencl_c_images"}};
+      {"__opencl_c_3d_image_writes", "__opencl_c_images"},
+      {"__opencl_c_pipes", "__opencl_c_generic_address_space"}};
 
   auto OpenCLFeaturesMap = TI.getSupportedOpenCLOpts();
 
diff --git a/clang/lib/Basic/TargetInfo.cpp b/clang/lib/Basic/TargetInfo.cpp
--- a/clang/lib/Basic/TargetInfo.cpp
+++ b/clang/lib/Basic/TargetInfo.cpp
@@ -400,14 +400,18 @@
     // OpenCL C v3.0 s6.7.5 - The generic address space requires support for
     // OpenCL C 2.0 or OpenCL C 3.0 with the __opencl_c_generic_address_space
     // feature
-    // FIXME: OpenCLGenericAddressSpace is also defined in setLangDefaults()
+    // OpenCL C v3.0 s6.2.1 - OpenCL pipes require support of OpenCL C 2.0
+    // or later and __opencl_c_pipes feature
+    // FIXME: These language options are also defined in setLangDefaults()
     // for OpenCL C 2.0 but with no access to target capabilities. Target
-    // should be immutable once created and thus this language option needs
+    // should be immutable once created and thus these language options need
     // to be defined only once.
-    if (Opts.OpenCLVersion >= 300) {
+    if (Opts.OpenCLVersion == 300) {
       const auto &OpenCLFeaturesMap = getSupportedOpenCLOpts();
       Opts.OpenCLGenericAddressSpace = hasFeatureEnabled(
           OpenCLFeaturesMap, "__opencl_c_generic_address_space");
+      Opts.OpenCLPipes =
+          hasFeatureEnabled(OpenCLFeaturesMap, "__opencl_c_pipes");
     }
   }
 
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -3173,7 +3173,7 @@
     Opts.ZVector = 0;
     Opts.setDefaultFPContractMode(LangOptions::FPM_On);
     Opts.OpenCLCPlusPlus = Opts.CPlusPlus;
-    Opts.OpenCLPipe = Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
+    Opts.OpenCLPipes = Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
     Opts.OpenCLGenericAddressSpace =
         Opts.OpenCLCPlusPlus || Opts.OpenCLVersion == 200;
 
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -3952,8 +3952,12 @@
         Tok.getIdentifierInfo()->revertTokenIDToIdentifier();
         Tok.setKind(tok::identifier);
         goto DoneWithDeclSpec;
-      }
-      isInvalid = DS.SetTypePipe(true, Loc, PrevSpec, DiagID, Policy);
+      } else if (!getLangOpts().OpenCLPipes) {
+        DiagID = diag::err_opencl_unknown_type_specifier;
+        PrevSpec = Tok.getIdentifierInfo()->getNameStart();
+        isInvalid = true;
+      } else
+        isInvalid = DS.SetTypePipe(true, Loc, PrevSpec, DiagID, Policy);
       break;
 // We only need to enumerate each image type once.
 #define IMAGE_READ_WRITE_TYPE(Type, Id, Ext)
@@ -5126,8 +5130,10 @@
   switch (Tok.getKind()) {
   default: return false;
 
+  // OpenCL 2.0 and later define this keyword.
   case tok::kw_pipe:
-    return getLangOpts().OpenCLPipe;
+    return (getLangOpts().OpenCL && getLangOpts().OpenCLVersion >= 200) ||
+           getLangOpts().OpenCLCPlusPlus;
 
   case tok::identifier:   // foo::bar
     // Unfortunate hack to support "Class.factoryMethod" notation.
@@ -5656,7 +5662,9 @@
   if (Kind == tok::star || Kind == tok::caret)
     return true;
 
-  if (Kind == tok::kw_pipe && Lang.OpenCLPipe)
+  // OpenCL 2.0 and later define this keyword.
+  if (Kind == tok::kw_pipe &&
+      ((Lang.OpenCL && Lang.OpenCLVersion >= 200) || Lang.OpenCLCPlusPlus))
     return true;
 
   if (!Lang.CPlusPlus)
diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -333,7 +333,8 @@
     if (getLangOpts().OpenCLCPlusPlus || getLangOpts().OpenCLVersion >= 200) {
       addImplicitTypedef("clk_event_t", Context.OCLClkEventTy);
       addImplicitTypedef("queue_t", Context.OCLQueueTy);
-      addImplicitTypedef("reserve_id_t", Context.OCLReserveIDTy);
+      if (getLangOpts().OpenCLPipes)
+        addImplicitTypedef("reserve_id_t", Context.OCLReserveIDTy);
       addImplicitTypedef("atomic_int", Context.getAtomicType(Context.IntTy));
       addImplicitTypedef("atomic_uint",
                          Context.getAtomicType(Context.UnsignedIntTy));
diff --git a/clang/test/CodeGenOpenCL/address-spaces-mangling.cl b/clang/test/CodeGenOpenCL/address-spaces-mangling.cl
--- a/clang/test/CodeGenOpenCL/address-spaces-mangling.cl
+++ b/clang/test/CodeGenOpenCL/address-spaces-mangling.cl
@@ -9,7 +9,7 @@
 // RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL2.0 -emit-llvm -o - | FileCheck -check-prefix=OCL-20 %s
 // RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL1.2 -emit-llvm -o - | FileCheck -check-prefix=OCL-12 %s
 // RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL3.0 -cl-ext=+__opencl_c_generic_address_space -emit-llvm -o - | FileCheck -check-prefix=OCL-20 %s
-// RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL3.0 -cl-ext=-__opencl_c_generic_address_space -emit-llvm -o - | FileCheck -check-prefix=OCL-12 %s
+// RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL3.0 -cl-ext=-__opencl_c_generic_address_space,-__opencl_c_pipes -emit-llvm -o - | FileCheck -check-prefix=OCL-12 %s
 
 // We can't name this f as private is equivalent to default
 // no specifier given address space so we get multiple definition
diff --git a/clang/test/CodeGenOpenCL/address-spaces.cl b/clang/test/CodeGenOpenCL/address-spaces.cl
--- a/clang/test/CodeGenOpenCL/address-spaces.cl
+++ b/clang/test/CodeGenOpenCL/address-spaces.cl
@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 %s -O0 -ffake-address-space-map -emit-llvm -o - | FileCheck %s --check-prefixes=CHECK,SPIR
-// RUN: %clang_cc1 %s -O0 -cl-std=CL3.0 -cl-ext=-__opencl_c_generic_address_space -ffake-address-space-map -emit-llvm -o - | FileCheck %s --check-prefixes=CHECK,SPIR
+// RUN: %clang_cc1 %s -O0 -cl-std=CL3.0 -cl-ext=-__opencl_c_generic_address_space,-__opencl_c_pipes -ffake-address-space-map -emit-llvm -o - | FileCheck %s --check-prefixes=CHECK,SPIR
 // RUN: %clang_cc1 %s -O0 -DCL20 -cl-std=CL2.0 -ffake-address-space-map -emit-llvm -o - | FileCheck %s --check-prefixes=CL20,CL20SPIR
 // RUN: %clang_cc1 %s -O0 -triple amdgcn-amd-amdhsa -emit-llvm -o - | FileCheck --check-prefixes=CHECK,AMDGCN %s
 // RUN: %clang_cc1 %s -O0 -triple amdgcn-amd-amdhsa -cl-std=CL3.0 -emit-llvm -o - | FileCheck --check-prefixes=CHECK,AMDGCN %s
diff --git a/clang/test/CodeGenOpenCL/pipe_builtin.cl b/clang/test/CodeGenOpenCL/pipe_builtin.cl
--- a/clang/test/CodeGenOpenCL/pipe_builtin.cl
+++ b/clang/test/CodeGenOpenCL/pipe_builtin.cl
@@ -71,3 +71,16 @@
   // CHECK: call i32 @__get_pipe_max_packets_wo(%opencl.pipe_wo_t* %{{.*}}, i32 4, i32 4)
   *ptr = get_pipe_max_packets(p);
 }
+
+struct Person {
+  const char *Name;
+  bool isFemale;
+  int ID;
+};
+
+void test9(global struct Person *SDst, read_only pipe struct Person SPipe) {
+  // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
+  read_pipe (SPipe, SDst);
+  // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
+  read_pipe (SPipe, SDst);
+}
diff --git a/clang/test/CodeGenOpenCL/pipe_types.cl b/clang/test/CodeGenOpenCL/pipe_types.cl
--- a/clang/test/CodeGenOpenCL/pipe_types.cl
+++ b/clang/test/CodeGenOpenCL/pipe_types.cl
@@ -1,4 +1,6 @@
 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL2.0 -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space,+__opencl_c_program_scope_global_variables -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space,-__opencl_c_program_scope_global_variables -o - %s | FileCheck %s
 
 // CHECK: %opencl.pipe_ro_t = type opaque
 // CHECK: %opencl.pipe_wo_t = type opaque
@@ -31,18 +33,3 @@
 kernel void test6(MyPipe p) {
 // CHECK: define{{.*}} spir_kernel void @test6(%opencl.pipe_ro_t* %p)
 }
-
-struct Person {
-  const char *Name;
-  bool isFemale;
-  int ID;
-};
-
-void test_reserved_read_pipe(global struct Person *SDst,
-                             read_only pipe struct Person SPipe) {
-// CHECK: define{{.*}} void @test_reserved_read_pipe
-  read_pipe (SPipe, SDst);
-  // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
-  read_pipe (SPipe, SDst);
-  // CHECK: call i32 @__read_pipe_2(%opencl.pipe_ro_t* %{{.*}}, i8* %{{.*}}, i32 16, i32 8)
-}
diff --git a/clang/test/CodeGenOpenCL/pipe_types_mangling.cl b/clang/test/CodeGenOpenCL/pipe_types_mangling.cl
--- a/clang/test/CodeGenOpenCL/pipe_types_mangling.cl
+++ b/clang/test/CodeGenOpenCL/pipe_types_mangling.cl
@@ -2,6 +2,10 @@
 // RUN: %clang_cc1 -triple x86_64-unknown-windows-pc -emit-llvm -O0 -cl-std=clc++ -o - %s -DWIN| FileCheck %s --check-prefixes=WINDOWS
 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL2.0 -o - %s | FileCheck %s --check-prefixes=LINUX
 // RUN: %clang_cc1 -triple x86_64-unknown-windows-pc -emit-llvm -O0 -cl-std=CL2.0 -o - %s -DWIN| FileCheck %s --check-prefixes=OCLWINDOWS
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space -o - %s | FileCheck %s --check-prefixes=LINUX
+// RUN: %clang_cc1 -triple x86_64-unknown-windows-pc -emit-llvm -O0 -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space -o - %s -DWIN | FileCheck %s --check-prefixes=OCLWINDOWS
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -O0 -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space,+__opencl_c_program_scope_global_variables -o - %s | FileCheck %s --check-prefixes=LINUX
+// RUN: %clang_cc1 -triple x86_64-unknown-windows-pc -emit-llvm -O0 -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space,-__opencl_c_program_scope_global_variables -o - %s -DWIN | FileCheck %s --check-prefixes=OCLWINDOWS
 
 typedef unsigned char __attribute__((ext_vector_type(3))) uchar3;
 typedef int __attribute__((ext_vector_type(4))) int4;
diff --git a/clang/test/Misc/opencl-c-3.0.incorrect_options.cl b/clang/test/Misc/opencl-c-3.0.incorrect_options.cl
--- a/clang/test/Misc/opencl-c-3.0.incorrect_options.cl
+++ b/clang/test/Misc/opencl-c-3.0.incorrect_options.cl
@@ -1,8 +1,7 @@
 // RUN: not %clang_cc1 -cl-std=CL3.0 -triple spir-unknown-unknown -cl-ext=-__opencl_c_fp64,+cl_khr_fp64 %s 2>&1 | FileCheck -check-prefix=CHECK-FP64 %s
 // RUN: not %clang_cc1 -cl-std=CL3.0 -triple spir-unknown-unknown -cl-ext=+__opencl_c_fp64,-cl_khr_fp64 %s 2>&1 | FileCheck -check-prefix=CHECK-FP64 %s
-
 // RUN: not %clang_cc1 -cl-std=CL3.0 -triple spir-unknown-unknown -cl-ext=+__opencl_c_read_write_images,-__opencl_c_images %s 2>&1 | FileCheck -check-prefix=CHECK-READ-WRITE-IMAGES %s
-
+// RUN: not %clang_cc1 -cl-std=CL3.0 -triple spir-unknown-unknown -cl-ext=+__opencl_c_pipes,-__opencl_c_generic_address_space %s 2>&1 | FileCheck -check-prefix=CHECK-PIPES %s
 // RUN: not %clang_cc1 -cl-std=CL3.0 -triple spir-unknown-unknown -cl-ext=+__opencl_c_3d_image_writes,+__opencl_c_images,-cl_khr_3d_image_writes %s 2>&1 | FileCheck -check-prefix=CHECK-3D-WRITE-IMAGES-DIFF %s
 // RUN: not %clang_cc1 -cl-std=CL3.0 -triple spir-unknown-unknown -cl-ext=+__opencl_c_3d_image_writes,-__opencl_c_images %s 2>&1 | FileCheck -check-prefix=CHECK-3D-WRITE-IMAGES-DEPS %s
 
@@ -12,3 +11,5 @@
 
 // CHECK-3D-WRITE-IMAGES-DIFF: options cl_khr_3d_image_writes and __opencl_c_3d_image_writes are set to different values
 // CHECK-3D-WRITE-IMAGES-DEPS: error: feature __opencl_c_3d_image_writes requires support of __opencl_c_images feature
+
+// CHECK-PIPES: error: feature __opencl_c_pipes requires support of __opencl_c_generic_address_space feature
diff --git a/clang/test/SemaOpenCL/invalid-pipes-cl1.2.cl b/clang/test/SemaOpenCL/invalid-pipes-cl1.2.cl
--- a/clang/test/SemaOpenCL/invalid-pipes-cl1.2.cl
+++ b/clang/test/SemaOpenCL/invalid-pipes-cl1.2.cl
@@ -1,9 +1,23 @@
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL1.2
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=-__opencl_c_pipes,-__opencl_c_generic_address_space
 
 void foo(read_only pipe int p);
-// expected-warning@-1 {{type specifier missing, defaults to 'int'}}
-// expected-error@-2 {{access qualifier can only be used for pipe and image type}}
-// expected-error@-3 {{expected ')'}} expected-note@-3 {{to match this '('}}
+#if __OPENCL_C_VERSION__ > 120
+// expected-error@-2 {{OpenCL C version 3.0 does not support the 'pipe' type qualifier}}
+// expected-error@-3 {{access qualifier can only be used for pipe and image type}}
+#else
+// expected-warning@-5 {{type specifier missing, defaults to 'int'}}
+// expected-error@-6 {{access qualifier can only be used for pipe and image type}}
+// expected-error@-7 {{expected ')'}} expected-note@-7 {{to match this '('}}
+#endif
 
 // 'pipe' should be accepted as an identifier.
 typedef int pipe;
+#if __OPENCL_C_VERSION__ > 120
+// expected-error@-2 {{OpenCL C version 3.0 does not support the 'pipe' type qualifier}}
+// expected-warning@-3 {{typedef requires a name}}
+#endif
+
+void bar() {
+ reserve_id_t r; // expected-error {{use of undeclared identifier 'reserve_id_t'}}
+}
diff --git a/clang/test/SemaOpenCL/invalid-pipes-cl2.0.cl b/clang/test/SemaOpenCL/invalid-pipes-cl2.0.cl
--- a/clang/test/SemaOpenCL/invalid-pipes-cl2.0.cl
+++ b/clang/test/SemaOpenCL/invalid-pipes-cl2.0.cl
@@ -1,10 +1,18 @@
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL2.0
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space,+__opencl_c_program_scope_global_variables
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=+__opencl_c_pipes,+__opencl_c_generic_address_space,-__opencl_c_program_scope_global_variables
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=clc++
 
 global pipe int gp;            // expected-error {{type '__global read_only pipe int' can only be used as a function parameter in OpenCL}}
 global reserve_id_t rid;          // expected-error {{the '__global reserve_id_t' type cannot be used to declare a program scope variable}}
 
-extern pipe write_only int get_pipe(); // expected-error-re{{type '__global write_only pipe int ({{(void)?}})' can only be used as a function parameter in OpenCL}} expected-error{{'write_only' attribute only applies to parameters and typedefs}}
+extern pipe write_only int get_pipe(); // expected-error {{'write_only' attribute only applies to parameters and typedefs}}
+#if defined(__OPENCL_CPP_VERSION__) || (__OPENCL_C_VERSION__ == 200) || (__OPENCL_C_VERSION__ == 300 && defined(__opencl_c_program_scope_global_variables))
+// expected-error-re@-2{{type '__global write_only pipe int ({{(void)?}})' can only be used as a function parameter in OpenCL}}
+#else
+// FIXME: '__private' here makes no sense since program scope variables feature is not supported, should diagnose as '__global' probably
+// expected-error-re@-5{{type '__private write_only pipe int ({{(void)?}})' can only be used as a function parameter in OpenCL}}
+#endif
 
 kernel void test_invalid_reserved_id(reserve_id_t ID) { // expected-error {{'__private reserve_id_t' cannot be used as the type of a kernel parameter}}
 }
diff --git a/clang/test/SemaOpenCL/storageclass.cl b/clang/test/SemaOpenCL/storageclass.cl
--- a/clang/test/SemaOpenCL/storageclass.cl
+++ b/clang/test/SemaOpenCL/storageclass.cl
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL1.2
-// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=-__opencl_c_program_scope_global_variables,-__opencl_c_generic_address_space
-// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=+__opencl_c_program_scope_global_variables,-__opencl_c_generic_address_space
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=-__opencl_c_program_scope_global_variables,-__opencl_c_generic_address_space,-__opencl_c_pipes
+// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=+__opencl_c_program_scope_global_variables,-__opencl_c_generic_address_space,-__opencl_c_pipes
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=-__opencl_c_program_scope_global_variables,+__opencl_c_generic_address_space
 // RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only -cl-std=CL3.0 -cl-ext=+__opencl_c_program_scope_global_variables,+__opencl_c_generic_address_space
 static constant int G1 = 0;