| // RUN: %clang_profgen -o %t -O3 %s |
| // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t |
| // RUN: llvm-profdata merge -o %t.profdata %t.profraw |
| // RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s |
| |
| int __llvm_profile_runtime = 0; |
| void __llvm_profile_initialize_file(void); |
| 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 > 1) |
| return 1; |
| |
| // Since the runtime has been suppressed, initialize the file name, as the |
| // writing will fail below as the file name has not been specified. |
| __llvm_profile_initialize_file(); |
| |
| // Write out the profile. |
| __llvm_profile_write_file(); |
| |
| // Change the profile. |
| return foo(0); |
| } |
| int foo(int X) { |
| // There should be no profiling information for @foo, since it was called |
| // after the profile was written (and the atexit was suppressed by defining |
| // profile_runtime). |
| // CHECK-LABEL: define {{.*}} @foo( |
| // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}} |
| return X <= 0 ? -X : X; |
| } |
| // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2} |
