1 // RUN: %clang_cc1 -verify -fopenmp -x c++ -emit-llvm -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -o - %s | FileCheck %s
2 // RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -fexceptions -fcxx-exceptions -triple x86_64-unknown-unknown -emit-pch -o %t %s
3 // RUN: %clang_cc1 -fopenmp -x c++ -std=c++11 -include-pch %t -fsyntax-only -verify %s -triple x86_64-unknown-unknown -fexceptions -fcxx-exceptions -emit-llvm -o - | FileCheck %s
4 // expected-no-diagnostics
5 // REQUIRES: x86-registered-target
6 #ifndef HEADER
7 #define HEADER
8 // CHECK: [[IMPLICIT_BARRIER_SECTIONS_LOC:@.+]] = private unnamed_addr constant %{{.+}} { i32 0, i32 194, i32 0, i32 0, i8*
9 // CHECK-LABEL: foo
foo()10 void foo() {};
11 // CHECK-LABEL: bar
bar()12 void bar() {};
13
14 template <class T>
tmain()15 T tmain() {
16 #pragma omp parallel
17 #pragma omp sections
18 {
19 foo();
20 }
21 return T();
22 }
23
24 // CHECK-LABEL: @main
main()25 int main() {
26 float l = 0.0; // Used as a base point in checks.
27 // CHECK: [[GTID:%.+]] = call{{.*}} i32 @__kmpc_global_thread_num({{.*}})
28 // CHECK: store float
29 #pragma omp sections
30 {
31 // CHECK: store i32 0, i32* [[LB_PTR:%.+]],
32 // CHECK: store i32 1, i32* [[UB_PTR:%.+]],
33 // CHECK: call void @__kmpc_for_static_init_4(%{{.+}}* @{{.+}}, i32 [[GTID]], i32 34, i32* [[IS_LAST_PTR:%.+]], i32* [[LB_PTR]], i32* [[UB_PTR]], i32* [[STRIDE_PTR:%.+]], i32 1, i32 1)
34 // <<UB = min(UB, GlobalUB);>>
35 // CHECK: [[UB:%.+]] = load i32, i32* [[UB_PTR]]
36 // CHECK: [[CMP:%.+]] = icmp slt i32 [[UB]], 1
37 // CHECK: [[MIN_UB_GLOBALUB:%.+]] = select i1 [[CMP]], i32 [[UB]], i32 1
38 // CHECK: store i32 [[MIN_UB_GLOBALUB]], i32* [[UB_PTR]]
39 // <<IV = LB;>>
40 // CHECK: [[LB:%.+]] = load i32, i32* [[LB_PTR]]
41 // CHECK: store i32 [[LB]], i32* [[IV_PTR:%.+]]
42 // CHECK: br label %[[INNER_FOR_COND:.+]]
43 // CHECK: [[INNER_FOR_COND]]
44 // <<IV <= UB?>>
45 // CHECK: [[IV:%.+]] = load i32, i32* [[IV_PTR]]
46 // CHECK: [[UB:%.+]] = load i32, i32* [[UB_PTR]]
47 // CHECK: [[CMP:%.+]] = icmp sle i32 [[IV]], [[UB]]
48 // CHECK: br i1 [[CMP]], label %[[INNER_LOOP_BODY:.+]], label %[[INNER_LOOP_END:.+]]
49 // CHECK: [[INNER_LOOP_BODY]]
50 // <<TRUE>> - > <BODY>
51 // CHECK: [[IV:%.+]] = load i32, i32* [[IV_PTR]]
52 // CHECK: switch i32 [[IV]], label %[[SECTIONS_EXIT:.+]] [
53 // CHECK-NEXT: i32 0, label %[[SECTIONS_CASE0:.+]]
54 // CHECK-NEXT: i32 1, label %[[SECTIONS_CASE1:.+]]
55 #pragma omp section
56 // CHECK: [[SECTIONS_CASE0]]
57 // CHECK-NEXT: invoke void @{{.*}}foo{{.*}}()
58 // CHECK: br label %[[SECTIONS_EXIT]]
59 foo();
60 #pragma omp section
61 // CHECK: [[SECTIONS_CASE1]]
62 // CHECK-NEXT: invoke void @{{.*}}bar{{.*}}()
63 // CHECK: br label %[[SECTIONS_EXIT]]
64 bar();
65 // CHECK: [[SECTIONS_EXIT]]
66 // <<++IV;>>
67 // CHECK: [[IV:%.+]] = load i32, i32* [[IV_PTR]]
68 // CHECK-NEXT: [[INC:%.+]] = add nsw i32 [[IV]], 1
69 // CHECK-NEXT: store i32 [[INC]], i32* [[IV_PTR]]
70 // CHECK-NEXT: br label %[[INNER_FOR_COND]]
71 // CHECK: [[INNER_LOOP_END]]
72 }
73 // CHECK: call void @__kmpc_for_static_fini(%{{.+}}* @{{.+}}, i32 [[GTID]])
74 // CHECK: call void @__kmpc_barrier(%{{.+}}* [[IMPLICIT_BARRIER_SECTIONS_LOC]],
75 #pragma omp sections nowait
76 {
77 foo();
78 #pragma omp section
79 bar();
80 }
81 // CHECK-NOT: __kmpc_cancel_barrier
82 return tmain<int>();
83 }
84
85 // CHECK-LABEL: tmain
86 // CHECK: call void {{.*}} @__kmpc_fork_call(
87 // CHECK-NOT: __kmpc_global_thread_num
88 // CHECK: call void @__kmpc_for_static_init_4(
89 // CHECK: invoke void @{{.*}}foo{{.*}}()
90 // CHECK-NEXT: unwind label %[[TERM_LPAD:.+]]
91 // CHECK: call void @__kmpc_for_static_fini(
92 // CHECK: call void @__kmpc_barrier(%{{.+}}* [[IMPLICIT_BARRIER_SECTIONS_LOC]],
93 // CHECK: ret
94 // CHECK: [[TERM_LPAD]]
95 // CHECK: call void @__clang_call_terminate(i8*
96 // CHECK-NEXT: unreachable
97
98 #endif
99