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 6 int __llvm_profile_runtime = 0; 7 void __llvm_profile_initialize_file(void); 8 int __llvm_profile_write_file(void); 9 void __llvm_profile_set_filename(const char *); 10 int foo(int); 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 > 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 } 27 int 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
