1// Tests for instrumentation of C++11 range-for
2
3// RUN: %clang_cc1 -x c++ %s -triple %itanium_abi_triple -main-file-name cxx-rangefor.cpp -std=c++11 -o - -emit-llvm -fprofile-instrument=clang > %tgen
4// RUN: FileCheck --input-file=%tgen -check-prefix=CHECK -check-prefix=PGOGEN %s
5
6// RUN: llvm-profdata merge %S/Inputs/cxx-rangefor.proftext -o %t.profdata
7// RUN: %clang_cc1 -x c++ %s -triple %itanium_abi_triple -main-file-name cxx-rangefor.cpp -std=c++11 -o - -emit-llvm -fprofile-instrument-use-path=%t.profdata > %tuse
8// RUN: FileCheck --input-file=%tuse -check-prefix=CHECK -check-prefix=PGOUSE %s
9
10// PGOGEN: @[[RFC:__profc__Z9range_forv]] = private global [5 x i64] zeroinitializer
11
12// CHECK-LABEL: define {{.*}}void @_Z9range_forv()
13// PGOGEN: store {{.*}} @[[RFC]], i64 0, i64 0
14void range_for() {
15  int arr[] = {1, 2, 3, 4, 5};
16  int sum = 0;
17  // PGOGEN: store {{.*}} @[[RFC]], i64 0, i64 1
18  // PGOUSE: br {{.*}} !prof ![[RF1:[0-9]+]]
19  for (auto i : arr) {
20    // PGOGEN: store {{.*}} @[[RFC]], i64 0, i64 2
21    // PGOUSE: br {{.*}} !prof ![[RF2:[0-9]+]]
22    if (i == 3)
23      continue;
24    sum += i;
25    // PGOGEN: store {{.*}} @[[RFC]], i64 0, i64 3
26    // PGOUSE: br {{.*}} !prof ![[RF3:[0-9]+]]
27    if (sum >= 7)
28      break;
29  }
30
31  // PGOGEN: store {{.*}} @[[RFC]], i64 0, i64 4
32  // PGOUSE: br {{.*}} !prof ![[RF4:[0-9]+]]
33  if (sum) {}
34}
35
36// PGOUSE-DAG: ![[RF1]] = !{!"branch_weights", i32 5, i32 1}
37// PGOUSE-DAG: ![[RF2]] = !{!"branch_weights", i32 2, i32 4}
38// PGOUSE-DAG: ![[RF3]] = !{!"branch_weights", i32 2, i32 3}
39// PGOUSE-DAG: ![[RF4]] = !{!"branch_weights", i32 2, i32 1}
40
41int main(int argc, const char *argv[]) {
42  range_for();
43  return 0;
44}
45