1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - %s | FileCheck %s 2 3 // Check that passing -fno-unroll-loops does not impact the decision made using pragmas. 4 // RUN: %clang_cc1 -triple x86_64-apple-darwin -std=c++11 -emit-llvm -o - -O1 -disable-llvm-optzns -fno-unroll-loops %s | FileCheck %s 5 6 // Verify while loop is recognized after unroll pragma. 7 void while_test(int *List, int Length) { 8 // CHECK: define {{.*}} @_Z10while_test 9 int i = 0; 10 11 #pragma unroll 12 while (i < Length) { 13 // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_1:.*]] 14 List[i] = i * 2; 15 i++; 16 } 17 } 18 19 // Verify do loop is recognized after multi-option pragma clang loop directive. 20 void do_test(int *List, int Length) { 21 // CHECK: define {{.*}} @_Z7do_test 22 int i = 0; 23 24 #pragma nounroll 25 do { 26 // CHECK: br i1 {{.*}}, label {{.*}}, label {{.*}}, !llvm.loop ![[LOOP_2:.*]] 27 List[i] = i * 2; 28 i++; 29 } while (i < Length); 30 } 31 32 // Verify for loop is recognized after unroll pragma. 33 void for_test(int *List, int Length) { 34 // CHECK: define {{.*}} @_Z8for_test 35 #pragma unroll 8 36 for (int i = 0; i < Length; i++) { 37 // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_3:.*]] 38 List[i] = i * 2; 39 } 40 } 41 42 // Verify c++11 for range loop is recognized after unroll pragma. 43 void for_range_test() { 44 // CHECK: define {{.*}} @_Z14for_range_test 45 double List[100]; 46 47 #pragma unroll(4) 48 for (int i : List) { 49 // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_4:.*]] 50 List[i] = i; 51 } 52 } 53 54 #define UNROLLCOUNT 8 55 56 // Verify defines are correctly resolved in unroll pragmas. 57 void for_define_test(int *List, int Length, int Value) { 58 // CHECK: define {{.*}} @_Z15for_define_test 59 #pragma unroll(UNROLLCOUNT) 60 for (int i = 0; i < Length; i++) { 61 // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_5:.*]] 62 List[i] = i * Value; 63 } 64 } 65 66 // Verify metadata is generated when template is used. 67 template <typename A> 68 void for_template_test(A *List, int Length, A Value) { 69 // CHECK: define {{.*}} @_Z13template_test 70 #pragma unroll 8 71 for (int i = 0; i < Length; i++) { 72 // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_6:.*]] 73 List[i] = i * Value; 74 } 75 } 76 77 // Verify define is resolved correctly when template is used. 78 template <typename A> 79 void for_template_define_test(A *List, int Length, A Value) { 80 // CHECK: define {{.*}} @_Z24for_template_define_test 81 82 #pragma unroll(UNROLLCOUNT) 83 for (int i = 0; i < Length; i++) { 84 // CHECK: br label {{.*}}, !llvm.loop ![[LOOP_7:.*]] 85 List[i] = i * Value; 86 } 87 } 88 89 #undef UNROLLCOUNT 90 91 // Use templates defined above. Test verifies metadata is generated correctly. 92 void template_test(double *List, int Length) { 93 double Value = 10; 94 95 for_template_test<double>(List, Length, Value); 96 for_template_define_test<double>(List, Length, Value); 97 } 98 99 // CHECK: ![[LOOP_1]] = distinct !{![[LOOP_1]], [[MP:![0-9]+]], ![[UNROLL_ENABLE:.*]]} 100 // CHECK: ![[UNROLL_ENABLE]] = !{!"llvm.loop.unroll.enable"} 101 // CHECK: ![[LOOP_2]] = distinct !{![[LOOP_2:.*]], ![[UNROLL_DISABLE:.*]]} 102 // CHECK: ![[UNROLL_DISABLE]] = !{!"llvm.loop.unroll.disable"} 103 // CHECK: ![[LOOP_3]] = distinct !{![[LOOP_3]], [[MP]], ![[UNROLL_8:.*]]} 104 // CHECK: ![[UNROLL_8]] = !{!"llvm.loop.unroll.count", i32 8} 105 // CHECK: ![[LOOP_4]] = distinct !{![[LOOP_4]], ![[UNROLL_4:.*]]} 106 // CHECK: ![[UNROLL_4]] = !{!"llvm.loop.unroll.count", i32 4} 107 // CHECK: ![[LOOP_5]] = distinct !{![[LOOP_5]], ![[UNROLL_8:.*]]} 108 // CHECK: ![[LOOP_6]] = distinct !{![[LOOP_6]], ![[UNROLL_8:.*]]} 109 // CHECK: ![[LOOP_7]] = distinct !{![[LOOP_7]], ![[UNROLL_8:.*]]} 110