1 // RUN: %clang_profgen -o %t -O3 %s
2 // RUN: env LLVM_PROFILE_FILE=%t1.profraw %run %t %t2.profraw
3 // RUN: llvm-profdata merge -o %t1.profdata %t1.profraw
4 // RUN: %clang_profuse=%t1.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK
5 // RUN: llvm-profdata merge -o %t2.profdata %t2.profraw
6 // RUN: %clang_profuse=%t2.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK
7
8 int __llvm_profile_write_file(void);
9 void __llvm_profile_set_filename(const char *);
10 int foo(int);
main(int argc,const char * argv[])11 int main(int argc, const char *argv[]) {
12 // CHECK-LABEL: define {{.*}} @main(
13 // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]]
14 if (argc < 2)
15 return 1;
16
17 // Write out the profile.
18 __llvm_profile_write_file();
19
20 // Change the profile.
21 int Ret = foo(0);
22
23 // It'll write out again at exit; change the filename so we get two files.
24 __llvm_profile_set_filename(argv[1]);
25 return Ret;
26 }
foo(int X)27 int foo(int X) {
28 // CHECK-LABEL: define {{.*}} @foo(
29 // CHECK1: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
30 // CHECK2: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD2:[0-9]+]]
31 return X <= 0 ? -X : X;
32 }
33 // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2}
34 // CHECK2: ![[PD2]] = !{!"branch_weights", i32 2, i32 1}
35