sys/external/bsd/compiler_rt/dist/test/profile/instrprof-write-file.c

   1 // RUN: %clang_profgen -o %t -O3 %s
   2 // RUN: env LLVM_PROFILE_FILE=%t1.profraw %run %t %t2.profraw
   3 // RUN: llvm-profdata merge -o %t1.profdata %t1.profraw
   4 // RUN: %clang_profuse=%t1.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK
   5 // RUN: llvm-profdata merge -o %t2.profdata %t2.profraw
   6 // RUN: %clang_profuse=%t2.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK
   7
   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 i32 @main
  13   // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof !1
  14   if (argc < 2)
  15     return 1;
  16
  17   // Write out the profile.
  18   __llvm_profile_write_file();
  19
  20   // Change the profile.
  21   int Ret = foo(0);
  22
  23   // It'll write out again at exit; change the filename so we get two files.
  24   __llvm_profile_set_filename(argv[1]);
  25   return Ret;
  26 }
  27 int foo(int X) {
  28   // CHECK-LABEL: define i32 @foo
  29   // CHECK1: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
  30   // CHECK2: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof !2
  31   return X <= 0 ? -X : X;
  32 }
  33 // CHECK: !1 = metadata !{metadata !"branch_weights", i32 1, i32 2}
  34 // CHECK2: !2 = metadata !{metadata !"branch_weights", i32 2, i32 1}