clang/test/Profile/c-captured.c

// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-captured.c %s -o - -emit-llvm -fprofile-instr-generate | FileCheck -check-prefix=PGOGEN -check-prefix=PGOALL %s

// RUN: llvm-profdata merge %S/Inputs/c-captured.proftext -o %t.profdata
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-captured.c %s -o - -emit-llvm -fprofile-instr-use=%t.profdata | FileCheck -check-prefix=PGOUSE -check-prefix=PGOALL %s

// PGOGEN: @[[DCC:__llvm_profile_counters_debug_captured]] = hidden global [3 x i64] zeroinitializer
// PGOGEN: @[[CSC:__llvm_profile_counters___captured_stmt]] = internal global [2 x i64] zeroinitializer
// PGOGEN: @[[C1C:__llvm_profile_counters___captured_stmt1]] = internal global [3 x i64] zeroinitializer

// PGOALL-LABEL: define void @debug_captured()
// PGOGEN: store {{.*}} @[[DCC]], i64 0, i64 0
void debug_captured() {
  int x = 10;

  // Check both debug_captured counters, so we can do this all in one pass
  // PGOGEN: store {{.*}} @[[DCC]], i64 0, i64 1
  // PGOUSE: br {{.*}} !prof ![[DC1:[0-9]+]]
  // PGOGEN: store {{.*}} @[[DCC]], i64 0, i64 2
  // PGOUSE: br {{.*}} !prof ![[DC2:[0-9]+]]
  // PGOALL: ret

  // PGOALL-LABEL: define internal void @__captured_stmt(
  // PGOGEN: store {{.*}} @[[CSC]], i64 0, i64 0
  #pragma clang __debug captured
  {
    // PGOGEN: store {{.*}} @[[CSC]], i64 0, i64 1
    // PGOUSE: br {{.*}} !prof ![[CS1:[0-9]+]]
    if (x) {}
    // PGOALL: ret
  }

  if (x) {} // This is DC1. Checked above.

  // PGOALL-LABEL: define internal void @__captured_stmt1(
  // PGOGEN: store {{.*}} @[[C1C]], i64 0, i64 0
  #pragma clang __debug captured
  {
    // PGOGEN: store {{.*}} @[[C1C]], i64 0, i64 1
    // PGOUSE: br {{.*}} !prof ![[C11:[0-9]+]]
    for (int i = 0; i < x; ++i) {}
    // PGOGEN: store {{.*}} @[[C1C]], i64 0, i64 2
    // PGOUSE: br {{.*}} !prof ![[C12:[0-9]+]]
    if (x) {}
    // PGOALL: ret
  }

  if (x) {} // This is DC2. Checked above.
}

// PGOUSE-DAG: ![[DC1]] = metadata !{metadata !"branch_weights", i32 2, i32 1}
// PGOUSE-DAG: ![[DC2]] = metadata !{metadata !"branch_weights", i32 2, i32 1}
// PGOUSE-DAG: ![[CS1]] = metadata !{metadata !"branch_weights", i32 2, i32 1}
// PGOUSE-DAG: ![[C11]] = metadata !{metadata !"branch_weights", i32 11, i32 2}
// PGOUSE-DAG: ![[C12]] = metadata !{metadata !"branch_weights", i32 2, i32 1}

int main(int argc, const char *argv[]) {
  debug_captured();
  return 0;
}