1// RUN: %clang_profgen -o %t -O3 %s
2// RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
3// RUN: llvm-profdata merge -o %t.profdata %t.profraw
4// RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s
5
6int __llvm_profile_runtime = 0;
7void __llvm_profile_initialize_file(void);
8int __llvm_profile_write_file(void);
9void __llvm_profile_set_filename(const char *);
10int foo(int);
11int main(int argc, const char *argv[]) {
12 // CHECK-LABEL: define {{.*}} @main(
13 // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]]
14 if (argc > 42)
15 return 1;
16
17 // Since the runtime has been suppressed, initialize the file name, as the
18 // writing will fail below as the file name has not been specified.
19 __llvm_profile_initialize_file();
20
21 // Write out the profile.
22 __llvm_profile_write_file();
23
24 // Change the profile.
25 return foo(0);
26}
27int foo(int X) {
28 // There should be no profiling information for @foo, since it was called
29 // after the profile was written (and the atexit was suppressed by defining
30 // profile_runtime).
31 // CHECK-LABEL: define {{.*}} @foo(
32 // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
33 return X <= 0 ? -X : X;
34}
35// CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2}
36