1 // Test that misexpect detects mis-annotated switch statements 2 3 // RUN: llvm-profdata merge %S/Inputs/misexpect-switch.proftext -o %t.profdata 4 // RUN: %clang_cc1 %s -O2 -o - -emit-llvm -fprofile-instrument-use-path=%t.profdata -verify -Wmisexpect -debug-info-kind=line-tables-only 5 6 #define inner_loop 1000 7 #define outer_loop 20 8 #define arry_size 25 9 10 int arry[arry_size] = {0}; 11 12 int rand(); 13 int sum(int *buff, int size); 14 int random_sample(int *buff, int size); 15 main()16int main() { 17 int val = 0; 18 19 int j, k; 20 for (j = 0; j < outer_loop; ++j) { 21 for (k = 0; k < inner_loop; ++k) { 22 unsigned condition = rand() % 10000; 23 switch (__builtin_expect(condition, 0)) { // expected-warning-re {{potential performance regression from use of __builtin_expect(): annotation was correct on {{.+}}% ({{[0-9]+ / [0-9]+}}) of profiled executions}} 24 case 0: 25 val += sum(arry, arry_size); 26 break; 27 case 1: 28 case 2: 29 case 3: 30 break; 31 default: 32 val += random_sample(arry, arry_size); 33 break; 34 } // end switch 35 } // end inner_loop 36 } // end outer_loop 37 38 return 0; 39 } 40