| // RUN: %clang_profgen -o %t -O3 %s |
| // RUN: env LLVM_PROFILE_FILE=%t1.profraw %run %t %t2.profraw |
| // RUN: llvm-profdata merge -o %t1.profdata %t1.profraw |
| // RUN: %clang_profuse=%t1.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK |
| // RUN: llvm-profdata merge -o %t2.profdata %t2.profraw |
| // RUN: %clang_profuse=%t2.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK |
| |
| int __llvm_profile_write_file(void); |
| void __llvm_profile_set_filename(const char *); |
| int foo(int); |
| int main(int argc, const char *argv[]) { |
| // CHECK-LABEL: define {{.*}} @main( |
| // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]] |
| if (argc < 2) |
| return 1; |
| |
| // Write out the profile. |
| __llvm_profile_write_file(); |
| |
| // Change the profile. |
| int Ret = foo(0); |
| |
| // It'll write out again at exit; change the filename so we get two files. |
| __llvm_profile_set_filename(argv[1]); |
| return Ret; |
| } |
| int foo(int X) { |
| // CHECK-LABEL: define {{.*}} @foo( |
| // CHECK1: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}} |
| // CHECK2: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD2:[0-9]+]] |
| return X <= 0 ? -X : X; |
| } |
| // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2} |
| // CHECK2: ![[PD2]] = !{!"branch_weights", i32 2, i32 1} |
