1// RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s
2
3// Verify while loop is recognized after unroll pragma.
4void while_test(int *List, int Length) {
5  // CHECK: define {{.*}} @_Z10while_test
6  int i = 0;
7
8#pragma unroll
9  while (i < Length) {
10    // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_1:.*]]
11    List[i] = i * 2;
12    i++;
13  }
14}
15
16// Verify do loop is recognized after multi-option pragma clang loop directive.
17void do_test(int *List, int Length) {
18  // CHECK: define {{.*}} @_Z7do_test
19  int i = 0;
20
21#pragma nounroll
22  do {
23    // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]]
24    List[i] = i * 2;
25    i++;
26  } while (i < Length);
27}
28
29// Verify for loop is recognized after unroll pragma.
30void for_test(int *List, int Length) {
31// CHECK: define {{.*}} @_Z8for_test
32#pragma unroll 8
33  for (int i = 0; i < Length; i++) {
34    // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_3:.*]]
35    List[i] = i * 2;
36  }
37}
38
39// Verify c++11 for range loop is recognized after unroll pragma.
40void for_range_test() {
41  // CHECK: define {{.*}} @_Z14for_range_test
42  double List[100];
43
44#pragma unroll(4)
45  for (int i : List) {
46    // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_4:.*]]
47    List[i] = i;
48  }
49}
50
51#define UNROLLCOUNT 8
52
53// Verify defines are correctly resolved in unroll pragmas.
54void for_define_test(int *List, int Length, int Value) {
55// CHECK: define {{.*}} @_Z15for_define_test
56#pragma unroll(UNROLLCOUNT)
57  for (int i = 0; i < Length; i++) {
58    // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_5:.*]]
59    List[i] = i * Value;
60  }
61}
62
63// Verify metadata is generated when template is used.
64template <typename A>
65void for_template_test(A *List, int Length, A Value) {
66// CHECK: define {{.*}} @_Z13template_test
67#pragma unroll 8
68  for (int i = 0; i < Length; i++) {
69    // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_6:.*]]
70    List[i] = i * Value;
71  }
72}
73
74// Verify define is resolved correctly when template is used.
75template <typename A>
76void for_template_define_test(A *List, int Length, A Value) {
77// CHECK: define {{.*}} @_Z24for_template_define_test
78
79#pragma unroll(UNROLLCOUNT)
80  for (int i = 0; i < Length; i++) {
81    // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_7:.*]]
82    List[i] = i * Value;
83  }
84}
85
86#undef UNROLLCOUNT
87
88// Use templates defined above. Test verifies metadata is generated correctly.
89void template_test(double *List, int Length) {
90  double Value = 10;
91
92  for_template_test<double>(List, Length, Value);
93  for_template_define_test<double>(List, Length, Value);
94}
95
96// CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], ![[UNROLL_ENABLE:.*]]}
97// CHECK: ![[UNROLL_ENABLE]] = !{!"llvm.loop.unroll.enable"}
98// CHECK: ![[LOOP_2]] = distinct !{![[LOOP_2:.*]], ![[UNROLL_DISABLE:.*]]}
99// CHECK: ![[UNROLL_DISABLE]] = !{!"llvm.loop.unroll.disable"}
100// CHECK: ![[LOOP_3]] = distinct !{![[LOOP_3]], ![[UNROLL_8:.*]]}
101// CHECK: ![[UNROLL_8]] = !{!"llvm.loop.unroll.count", i32 8}
102// CHECK: ![[LOOP_4]] = distinct !{![[LOOP_4]], ![[UNROLL_4:.*]]}
103// CHECK: ![[UNROLL_4]] = !{!"llvm.loop.unroll.count", i32 4}
104// CHECK: ![[LOOP_5]] = distinct !{![[LOOP_5]], ![[UNROLL_8:.*]]}
105// CHECK: ![[LOOP_6]] = distinct !{![[LOOP_6]], ![[UNROLL_8:.*]]}
106// CHECK: ![[LOOP_7]] = distinct !{![[LOOP_7]], ![[UNROLL_8:.*]]}
107