Index: clang/include/clang/Basic/BuiltinsAMDGPU.def
===================================================================
--- clang/include/clang/Basic/BuiltinsAMDGPU.def
+++ clang/include/clang/Basic/BuiltinsAMDGPU.def
@@ -44,6 +44,8 @@
 BUILTIN(__builtin_amdgcn_mbcnt_hi, "UiUiUi", "nc")
 BUILTIN(__builtin_amdgcn_mbcnt_lo, "UiUiUi", "nc")
 
+TARGET_BUILTIN(__builtin_amdgcn_s_memtime, "LUi", "n", "s-memtime-inst")
+
 //===----------------------------------------------------------------------===//
 // Instruction builtins.
 //===----------------------------------------------------------------------===//
@@ -105,7 +107,6 @@
 BUILTIN(__builtin_amdgcn_cubesc, "ffff", "nc")
 BUILTIN(__builtin_amdgcn_cubetc, "ffff", "nc")
 BUILTIN(__builtin_amdgcn_cubema, "ffff", "nc")
-BUILTIN(__builtin_amdgcn_s_memtime, "LUi", "n")
 BUILTIN(__builtin_amdgcn_s_sleep, "vIi", "n")
 BUILTIN(__builtin_amdgcn_s_incperflevel, "vIi", "n")
 BUILTIN(__builtin_amdgcn_s_decperflevel, "vIi", "n")
Index: clang/test/CodeGenOpenCL/builtins-amdgcn-ci.cl
===================================================================
--- clang/test/CodeGenOpenCL/builtins-amdgcn-ci.cl
+++ clang/test/CodeGenOpenCL/builtins-amdgcn-ci.cl
@@ -5,6 +5,7 @@
 // RUN: %clang_cc1 -cl-std=CL2.0 -O0 -triple amdgcn-unknown-unknown -target-cpu gfx1010 -S -emit-llvm -o - %s | FileCheck %s
 
 typedef unsigned int uint;
+typedef unsigned long ulong;
 
 // CHECK-LABEL: @test_s_dcache_inv_vol
 // CHECK: call void @llvm.amdgcn.s.dcache.inv.vol(
@@ -27,6 +28,13 @@
   __builtin_amdgcn_ds_gws_sema_release_all(id);
 }
 
+// CHECK-LABEL: @test_s_memtime
+// CHECK: call i64 @llvm.amdgcn.s.memtime()
+void test_s_memtime(global ulong* out)
+{
+  *out = __builtin_amdgcn_s_memtime();
+}
+
 // CHECK-LABEL: @test_is_shared(
 // CHECK: [[CAST:%[0-9]+]] = bitcast i32* %{{[0-9]+}} to i8*
 // CHECK: call i1 @llvm.amdgcn.is.shared(i8* [[CAST]]
Index: clang/test/CodeGenOpenCL/builtins-amdgcn-gfx10.cl
===================================================================
--- clang/test/CodeGenOpenCL/builtins-amdgcn-gfx10.cl
+++ clang/test/CodeGenOpenCL/builtins-amdgcn-gfx10.cl
@@ -4,6 +4,7 @@
 // RUN: %clang_cc1 -triple amdgcn-unknown-unknown -target-cpu gfx1012 -S -emit-llvm -o - %s | FileCheck %s
 
 typedef unsigned int uint;
+typedef unsigned long ulong;
 
 // CHECK-LABEL: @test_permlane16(
 // CHECK: call i32 @llvm.amdgcn.permlane16(i32 %a, i32 %b, i32 %c, i32 %d, i1 false, i1 false)
@@ -22,3 +23,10 @@
 void test_mov_dpp8(global uint* out, uint a) {
   *out = __builtin_amdgcn_mov_dpp8(a, 1);
 }
+
+// CHECK-LABEL: @test_s_memtime
+// CHECK: call i64 @llvm.amdgcn.s.memtime()
+void test_s_memtime(global ulong* out)
+{
+  *out = __builtin_amdgcn_s_memtime();
+}
Index: clang/test/CodeGenOpenCL/builtins-amdgcn-gfx9.cl
===================================================================
--- clang/test/CodeGenOpenCL/builtins-amdgcn-gfx9.cl
+++ clang/test/CodeGenOpenCL/builtins-amdgcn-gfx9.cl
@@ -3,6 +3,7 @@
 // RUN: %clang_cc1 -triple amdgcn-unknown-unknown -target-cpu gfx1010 -S -emit-llvm -o - %s | FileCheck %s
 
 #pragma OPENCL EXTENSION cl_khr_fp16 : enable
+typedef unsigned long ulong;
 
 // CHECK-LABEL: @test_fmed3_f16
 // CHECK: call half @llvm.amdgcn.fmed3.f16(half %a, half %b, half %c)
@@ -10,3 +11,10 @@
 {
   *out = __builtin_amdgcn_fmed3h(a, b, c);
 }
+
+// CHECK-LABEL: @test_s_memtime
+// CHECK: call i64 @llvm.amdgcn.s.memtime()
+void test_s_memtime(global ulong* out)
+{
+  *out = __builtin_amdgcn_s_memtime();
+}
Index: clang/test/CodeGenOpenCL/builtins-amdgcn-vi.cl
===================================================================
--- clang/test/CodeGenOpenCL/builtins-amdgcn-vi.cl
+++ clang/test/CodeGenOpenCL/builtins-amdgcn-vi.cl
@@ -130,3 +130,10 @@
 void test_ds_fmaxf(local float *out, float src) {
   *out = __builtin_amdgcn_ds_fmaxf(out, src, 0, 0, false);
 }
+
+// CHECK-LABEL: @test_s_memtime
+// CHECK: call i64 @llvm.amdgcn.s.memtime()
+void test_s_memtime(global ulong* out)
+{
+  *out = __builtin_amdgcn_s_memtime();
+}
Index: clang/test/CodeGenOpenCL/builtins-amdgcn.cl
===================================================================
--- clang/test/CodeGenOpenCL/builtins-amdgcn.cl
+++ clang/test/CodeGenOpenCL/builtins-amdgcn.cl
@@ -396,13 +396,6 @@
   __builtin_amdgcn_wave_barrier();
 }
 
-// CHECK-LABEL: @test_s_memtime
-// CHECK: call i64 @llvm.amdgcn.s.memtime()
-void test_s_memtime(global ulong* out)
-{
-  *out = __builtin_amdgcn_s_memtime();
-}
-
 // CHECK-LABEL: @test_s_sleep
 // CHECK: call void @llvm.amdgcn.s.sleep(i32 1)
 // CHECK: call void @llvm.amdgcn.s.sleep(i32 15)
Index: clang/test/SemaOpenCL/builtins-amdgcn-error-gfx1030.cl
===================================================================
--- /dev/null
+++ clang/test/SemaOpenCL/builtins-amdgcn-error-gfx1030.cl
@@ -0,0 +1,7 @@
+// REQUIRES: amdgpu-registered-target
+// RUN: %clang_cc1 -triple amdgcn-- -target-cpu gfx1030 -verify -S -o - %s
+
+void test_gfx1030_s_memtime()
+{
+  __builtin_amdgcn_s_memtime(); // expected-error {{'__builtin_amdgcn_s_memtime' needs target feature s-memtime-inst}}
+}