[AMDGPU] add s_incperflevel/s_decperflevel intrinsics

[vpykhtin]

Summary

Clang part of changes related to https://reviews.llvm.org/D23666

[arsenm]

LGTM

cfe/trunk/include/clang/Basic/BuiltinsAMDGPU.def

 BUILTIN(__builtin_amdgcn_class, "bdi", "nc")
 BUILTIN(__builtin_amdgcn_classf, "bfi", "nc")
 BUILTIN(__builtin_amdgcn_cubeid, "ffff", "nc")
 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")
 BUILTIN(__builtin_amdgcn_uicmp, "LUiUiUiIi", "nc")
 BUILTIN(__builtin_amdgcn_uicmpl, "LUiLUiLUiIi", "nc")
 BUILTIN(__builtin_amdgcn_sicmp, "LUiiiIi", "nc")
 BUILTIN(__builtin_amdgcn_sicmpl, "LUiLiLiIi", "nc")
 BUILTIN(__builtin_amdgcn_fcmp, "LUiddIi", "nc")
 BUILTIN(__builtin_amdgcn_fcmpf, "LUiffIi", "nc")
 BUILTIN(__builtin_amdgcn_ds_swizzle, "iiIi", "nc")
 

cfe/trunk/test/CodeGenOpenCL/builtins-amdgcn-error.cl

ulong test_s_memrealtime()
   return __builtin_amdgcn_s_memrealtime(); // expected-error {{'__builtin_amdgcn_s_memrealtime' needs target feature s-memrealtime}}
 }
 
 void test_s_sleep(int x)
 {
   __builtin_amdgcn_s_sleep(x); // expected-error {{argument to '__builtin_amdgcn_s_sleep' must be a constant integer}}
 }
 
+void test_s_incperflevel(int x)
+{
+  __builtin_amdgcn_s_incperflevel(x); // expected-error {{argument to '__builtin_amdgcn_s_incperflevel' must be a constant integer}}
+}
+
+void test_s_decperflevel(int x)
+{
+  __builtin_amdgcn_s_decperflevel(x); // expected-error {{argument to '__builtin_amdgcn_s_decperflevel' must be a constant integer}}
+}
+
 void test_sicmp_i32(global ulong* out, int a, int b, uint c)
 {
   *out = __builtin_amdgcn_sicmp(a, b, c); // expected-error {{argument to '__builtin_amdgcn_sicmp' must be a constant integer}}
 }
 
 void test_uicmp_i32(global ulong* out, uint a, uint b, uint c)
 {
   *out = __builtin_amdgcn_uicmp(a, b, c); // expected-error {{argument to '__builtin_amdgcn_uicmp' must be a constant integer}}

cfe/trunk/test/CodeGenOpenCL/builtins-amdgcn.cl

 // CHECK: call void @llvm.amdgcn.s.sleep(i32 1)
 // CHECK: call void @llvm.amdgcn.s.sleep(i32 15)
 void test_s_sleep()
 {
   __builtin_amdgcn_s_sleep(1);
   __builtin_amdgcn_s_sleep(15);
 }
 
+// CHECK-LABEL: @test_s_incperflevel
+// CHECK: call void @llvm.amdgcn.s.incperflevel(i32 1)
+// CHECK: call void @llvm.amdgcn.s.incperflevel(i32 15)
+void test_s_incperflevel()
+{
+  __builtin_amdgcn_s_incperflevel(1);
+  __builtin_amdgcn_s_incperflevel(15);
+}
+
+// CHECK-LABEL: @test_s_decperflevel
+// CHECK: call void @llvm.amdgcn.s.decperflevel(i32 1)
+// CHECK: call void @llvm.amdgcn.s.decperflevel(i32 15)
+void test_s_decperflevel()
+{
+  __builtin_amdgcn_s_decperflevel(1);
+  __builtin_amdgcn_s_decperflevel(15);
+}
+
 // CHECK-LABEL: @test_cubeid(
 // CHECK: call float @llvm.amdgcn.cubeid(float %a, float %b, float %c)
 void test_cubeid(global float* out, float a, float b, float c) {
   *out = __builtin_amdgcn_cubeid(a, b, c);
 }
 
 // CHECK-LABEL: @test_cubesc(
 // CHECK: call float @llvm.amdgcn.cubesc(float %a, float %b, float %c)