1 | // RUN: rm -rf %t1.profraw %t2.profraw |
2 | // RUN: %clang_profgen -o %t -O3 %s |
3 | // RUN: env LLVM_PROFILE_FILE=%t1.profraw %run %t %t2.profraw |
4 | // RUN: llvm-profdata merge -o %t1.profdata %t1.profraw |
5 | // RUN: %clang_profuse=%t1.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK |
6 | // RUN: llvm-profdata merge -o %t2.profdata %t2.profraw |
7 | // RUN: %clang_profuse=%t2.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK |
8 | |
9 | int __llvm_profile_write_file(void); |
10 | void __llvm_profile_set_filename(const char *); |
11 | int foo(int); |
12 | int main(int argc, const char *argv[]) { |
13 | // CHECK-LABEL: define {{.*}} @main( |
14 | // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]] |
15 | if (argc < 2) |
16 | return 1; |
17 | |
18 | // Write out the profile. |
19 | __llvm_profile_write_file(); |
20 | |
21 | // Change the profile. |
22 | int Ret = foo(0); |
23 | |
24 | // It'll write out again at exit; change the filename so we get two files. |
25 | __llvm_profile_set_filename(argv[1]); |
26 | return Ret; |
27 | } |
28 | int foo(int X) { |
29 | // CHECK-LABEL: define {{.*}} @foo( |
30 | // CHECK1: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}} |
31 | // CHECK2: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD2:[0-9]+]] |
32 | return X <= 0 ? -X : X; |
33 | } |
34 | // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2} |
35 | // CHECK2: ![[PD2]] = !{!"branch_weights", i32 2, i32 1} |
36 | |