Index: include/clang/Basic/BuiltinsAMDGPU.def
===================================================================
--- include/clang/Basic/BuiltinsAMDGPU.def
+++ include/clang/Basic/BuiltinsAMDGPU.def
@@ -61,6 +61,7 @@
 BUILTIN(__builtin_amdgcn_frexp_expf, "if", "nc")
 BUILTIN(__builtin_amdgcn_fract, "dd", "nc")
 BUILTIN(__builtin_amdgcn_fractf, "ff", "nc")
+BUILTIN(__builtin_amdgcn_lerp, "UiUiUiUi", "nc")
 BUILTIN(__builtin_amdgcn_class, "bdi", "nc")
 BUILTIN(__builtin_amdgcn_classf, "bfi", "nc")
 BUILTIN(__builtin_amdgcn_cubeid, "ffff", "nc")
Index: lib/CodeGen/CGBuiltin.cpp
===================================================================
--- lib/CodeGen/CGBuiltin.cpp
+++ lib/CodeGen/CGBuiltin.cpp
@@ -7659,6 +7659,8 @@
   case AMDGPU::BI__builtin_amdgcn_fract:
   case AMDGPU::BI__builtin_amdgcn_fractf:
     return emitUnaryBuiltin(*this, E, Intrinsic::amdgcn_fract);
+  case AMDGPU::BI__builtin_amdgcn_lerp:
+    return emitTernaryBuiltin(*this, E, Intrinsic::amdgcn_lerp);
   case AMDGPU::BI__builtin_amdgcn_class:
   case AMDGPU::BI__builtin_amdgcn_classf:
     return emitFPIntBuiltin(*this, E, Intrinsic::amdgcn_class);
Index: test/CodeGenOpenCL/builtins-amdgcn.cl
===================================================================
--- test/CodeGenOpenCL/builtins-amdgcn.cl
+++ test/CodeGenOpenCL/builtins-amdgcn.cl
@@ -192,6 +192,13 @@
   *out = __builtin_amdgcn_fract(a);
 }
 
+// CHECK-LABEL: @test_lerp
+// CHECK: call i32 @llvm.amdgcn.lerp
+void test_lerp(global int* out, int a, int b, int c)
+{
+  *out = __builtin_amdgcn_lerp(a, b, c);
+}
+
 // CHECK-LABEL: @test_class_f32
 // CHECK: call i1 @llvm.amdgcn.class.f32
 void test_class_f32(global float* out, float a, int b)