45 lines · c
1// Test that misexpect emits no warning when switch condition is non-const2 3// RUN: llvm-profdata merge %S/Inputs/misexpect-switch-nonconst.proftext -o %t.profdata4// RUN: %clang_cc1 %s -O2 -o - -disable-llvm-passes -emit-llvm -fprofile-instrument-use=clang -fprofile-instrument-use-path=%t.profdata -verify5 6// expected-no-diagnostics7 8#define inner_loop 10009#define outer_loop 2010#define arry_size 2511 12int sum(int *buff, int size);13int random_sample(int *buff, int size);14int rand();15void init_arry();16 17int arry[arry_size] = {0};18 19int main() {20 init_arry();21 int val = 0;22 23 int j, k;24 for (j = 0; j < outer_loop; ++j) {25 for (k = 0; k < inner_loop; ++k) {26 unsigned condition = rand() % 10000;27 switch (__builtin_expect(condition, rand())) {28 case 0:29 val += sum(arry, arry_size);30 break;31 case 1:32 case 2:33 case 3:34 case 4:35 val += random_sample(arry, arry_size);36 break;37 default:38 __builtin_unreachable();39 } // end switch40 } // end inner_loop41 } // end outer_loop42 43 return 0;44}45