Revert "[SYCL][NFC] Refactor [[intel::reqd_sub_group_size()]] attribute tests (#6243)" (#6258)

This reverts commit 4071659.

Author: Pavel Chupin

clang/test/SemaSYCL/reqd-sub-group-size-ast.cpp

@@ -0,0 +1,125 @@
+// RUN: %clang_cc1 -fsycl-is-device -internal-isystem %S/Inputs -fsyntax-only -sycl-std=2017 -Wno-sycl-2017-compat -verify -DTRIGGER_ERROR %s
+// RUN: %clang_cc1 -fsycl-is-device -internal-isystem %S/Inputs -sycl-std=2017 -Wno-sycl-2017-compat -ast-dump %s | FileCheck %s
+
+#include "sycl.hpp"
+
+using namespace cl::sycl;
+queue q;
+
+[[intel::reqd_sub_group_size(4)]] void foo() {} // expected-note {{conflicting attribute is here}}
+// expected-note@-1 {{conflicting attribute is here}}
+[[intel::reqd_sub_group_size(32)]] void baz() {} // expected-note {{conflicting attribute is here}}
+
+// No diagnostic is emitted because the arguments match.
+[[intel::reqd_sub_group_size(12)]] void bar();
+[[intel::reqd_sub_group_size(12)]] void bar() {} // OK
+
+// No diagnostic because the attributes are synonyms with identical behavior.
+[[sycl::reqd_sub_group_size(12)]] void bar(); // OK
+
+// Diagnostic is emitted because the arguments mismatch.
+[[intel::reqd_sub_group_size(12)]] void quux(); // expected-note {{previous attribute is here}}
+[[intel::reqd_sub_group_size(100)]] void quux(); // expected-warning {{attribute 'reqd_sub_group_size' is already applied with different arguments}} expected-note {{previous attribute is here}}
+[[sycl::reqd_sub_group_size(200)]] void quux(); // expected-warning {{attribute 'reqd_sub_group_size' is already applied with different arguments}}
+
+#ifdef TRIGGER_ERROR
+// Make sure there's at least one argument passed.
+[[sycl::reqd_sub_group_size]] void quibble(); // expected-error {{'reqd_sub_group_size' attribute takes one argument}}
+#endif // TRIGGER_ERROR
+
+class Functor16 {
+public:
+  [[intel::reqd_sub_group_size(16)]] void operator()() const {}
+};
+
+class Functor8 { // expected-error {{conflicting attributes applied to a SYCL kernel}}
+public:
+  [[intel::reqd_sub_group_size(8)]] void operator()() const { // expected-note {{conflicting attribute is here}}
+    foo();
+  }
+};
+
+class Functor4 {
+public:
+  [[intel::reqd_sub_group_size(12)]] void operator()() const {}
+};
+
+class Functor {
+public:
+  void operator()() const {
+    foo();
+  }
+};
+
+int main() {
+  q.submit([&](handler &h) {
+    Functor16 f16;
+    h.single_task<class kernel_name1>(f16);
+
+    Functor f;
+    h.single_task<class kernel_name2>(f);
+
+#ifdef TRIGGER_ERROR
+    Functor8 f8;
+    h.single_task<class kernel_name3>(f8);
+
+    h.single_task<class kernel_name4>([]() { // expected-error {{conflicting attributes applied to a SYCL kernel}}
+      foo();
+      baz();
+    });
+#endif
+
+    h.single_task<class kernel_name5>([]() [[intel::reqd_sub_group_size(2)]]{});
+    h.single_task<class kernel_name6>([]() [[intel::reqd_sub_group_size(4)]] { foo(); });
+    h.single_task<class kernel_name7>([]() [[intel::reqd_sub_group_size(6)]]{});
+
+    Functor4 f4;
+    h.single_task<class kernel_name8>(f4);
+  });
+  return 0;
+}
+
+[[intel::reqd_sub_group_size(16)]] SYCL_EXTERNAL void B();
+[[intel::reqd_sub_group_size(16)]] void A() {
+}
+
+[[intel::reqd_sub_group_size(16)]] SYCL_EXTERNAL void B() {
+  A();
+}
+
+#ifdef TRIGGER_ERROR
+// expected-note@+1 {{conflicting attribute is here}}
+[[intel::reqd_sub_group_size(2)]] void sg_size2() {}
+
+// expected-note@+2 {{conflicting attribute is here}}
+// expected-error@+1 {{conflicting attributes applied to a SYCL kernel}}
+[[intel::reqd_sub_group_size(4)]] __attribute__((sycl_device)) void sg_size4() {
+  sg_size2();
+}
+#endif
+
+// CHECK: FunctionDecl {{.*}} {{.*}}kernel_name1
+// CHECK: IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT: ConstantExpr {{.*}} 'int'
+// CHECK-NEXT: value: Int 16
+// CHECK-NEXT: IntegerLiteral{{.*}}16{{$}}
+// CHECK: FunctionDecl {{.*}} {{.*}}kernel_name2
+// CHECK: IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT: ConstantExpr {{.*}} 'int'
+// CHECK-NEXT: value: Int 4
+// CHECK-NEXT: IntegerLiteral{{.*}}4{{$}}
+// CHECK: FunctionDecl {{.*}} {{.*}}kernel_name5
+// CHECK: IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT: ConstantExpr {{.*}} 'int'
+// CHECK-NEXT: value: Int 2
+// CHECK-NEXT: IntegerLiteral{{.*}}2{{$}}
+// CHECK: FunctionDecl {{.*}} {{.*}}kernel_name7
+// CHECK: IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT: ConstantExpr {{.*}} 'int'
+// CHECK-NEXT: value: Int 6
+// CHECK-NEXT: IntegerLiteral{{.*}}6{{$}}
+// CHECK: FunctionDecl {{.*}} {{.*}}kernel_name8
+// CHECK: IntelReqdSubGroupSizeAttr {{.*}}
+// CHECK-NEXT: ConstantExpr {{.*}} 'int'
+// CHECK-NEXT: value: Int 12
+// CHECK-NEXT: IntegerLiteral{{.*}}12{{$}}