llvm-project/clang/test/Profile/misexpect-switch-nonconst.c

45 lines
1.0 KiB
C

// Test that misexpect emits no warning when switch condition is non-const
// RUN: llvm-profdata merge %S/Inputs/misexpect-switch-nonconst.proftext -o %t.profdata
// RUN: %clang_cc1 %s -O2 -o - -disable-llvm-passes -emit-llvm -fprofile-instrument-use-path=%t.profdata -verify
// expected-no-diagnostics
#define inner_loop 1000
#define outer_loop 20
#define arry_size 25
int sum(int *buff, int size);
int random_sample(int *buff, int size);
int rand();
void init_arry();
int arry[arry_size] = {0};
int main() {
init_arry();
int val = 0;
int j, k;
for (j = 0; j < outer_loop; ++j) {
for (k = 0; k < inner_loop; ++k) {
unsigned condition = rand() % 10000;
switch (__builtin_expect(condition, rand())) {
case 0:
val += sum(arry, arry_size);
break;
case 1:
case 2:
case 3:
case 4:
val += random_sample(arry, arry_size);
break;
default:
__builtin_unreachable();
} // end switch
} // end inner_loop
} // end outer_loop
return 0;
}