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

   1 // XFAIL: target={{.*}}-aix{{.*}}
   2 // RUN: %clang_profgen -o %t -O3 %s
   3 // RUN: env LLVM_PROFILE_FILE=%t.profraw %run %t
   4 // RUN: llvm-profdata merge -o %t.profdata %t.profraw
   5 // RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s
   6
   7 int __llvm_profile_runtime = 0;
   8 void __llvm_profile_initialize_file(void);
   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 > 42)
  16     return 1;
  17
  18   // Since the runtime has been suppressed, initialize the file name, as the
  19   // writing will fail below as the file name has not been specified.
  20   __llvm_profile_initialize_file();
  21
  22   // Write out the profile.
  23   __llvm_profile_write_file();
  24
  25   // Change the profile.
  26   return foo(0);
  27 }
  28 int foo(int X) {
  29   // There should be no profiling information for @foo, since it was called
  30   // after the profile was written (and the atexit was suppressed by defining
  31   // profile_runtime).
  32   // CHECK-LABEL: define {{.*}} @foo(
  33   // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
  34   return X <= 0 ? -X : X;
  35 }
  36 // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2}