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

   1 // RUN: rm -rf %t1.profraw %t2.profraw
   2 // RUN: %clang_profgen -o %t -O3 %s
   3 // RUN: env LLVM_PROFILE_FILE=%t1.profraw %run %t %t2.profraw
   4 // RUN: llvm-profdata merge -o %t1.profdata %t1.profraw
   5 // RUN: %clang_profuse=%t1.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK
   6 // RUN: llvm-profdata merge -o %t2.profdata %t2.profraw
   7 // RUN: %clang_profuse=%t2.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK
   8
   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 < 2)
  16     return 1;
  17
  18   // Write out the profile.
  19   __llvm_profile_write_file();
  20
  21   // Change the profile.
  22   int Ret = foo(0);
  23
  24   // It'll write out again at exit; change the filename so we get two files.
  25   __llvm_profile_set_filename(argv[1]);
  26   return Ret;
  27 }
  28 int foo(int X) {
  29   // CHECK-LABEL: define {{.*}} @foo(
  30   // CHECK1: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
  31   // CHECK2: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD2:[0-9]+]]
  32   return X <= 0 ? -X : X;
  33 }
  34 // CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2}
  35 // CHECK2: ![[PD2]] = !{!"branch_weights", i32 2, i32 1}