compiler-rt/test/profile/instrprof-write-file-only.c

   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}