compiler-rt/test/profile/instrprof-dump.c

   1 /*
   2 RUN: rm -fr %t.profdir
   3 RUN: %clang_profgen=%t.profdir/default_%m.profraw -o %t -O2 %s
   4 RUN: %run %t  2>&1 | FileCheck %s --check-prefix=NO_EXIT_WRITE
   5 RUN: llvm-profdata merge -o %t.profdata %t.profdir
   6 RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s  --check-prefix=PROF
   7
   8 NO_EXIT_WRITE: Profile data not written to file: already written
   9 */
  10
  11 int __llvm_profile_dump(void);
  12 void __llvm_profile_reset_counters(void);
  13 int foo(int);
  14 int bar(int);
  15 int skip(int);
  16
  17 int main(int argc, const char *argv[]) {
  18   int Ret = foo(0); /* region 1 */
  19   __llvm_profile_dump();
  20
  21   /* not profiled -- cleared later. */
  22   skip(0);   /* skipped region */
  23
  24   __llvm_profile_reset_counters();
  25   Ret += bar(0);  /* region 2 */
  26   __llvm_profile_dump();
  27
  28   skip(1);
  29
  30   __llvm_profile_reset_counters();
  31   /* foo's profile will be merged.  */
  32   foo(1);  /* region 3 */
  33   __llvm_profile_dump();
  34
  35   return Ret;
  36 }
  37
  38 __attribute__((noinline)) int foo(int X) {
  39   /* PROF: define {{.*}} @foo({{.*}}!prof ![[ENT:[0-9]+]]
  40      PROF: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]]
  41   */
  42   return X <= 0 ? -X : X;
  43 }
  44
  45 __attribute__((noinline)) int skip(int X) {
  46   /* PROF: define {{.*}} @skip(
  47      PROF: br i1 %{{.*}}, label %{{.*}}, label %{{[^,]+$}}
  48   */
  49   return X <= 0 ? -X : X;
  50 }
  51
  52 __attribute__((noinline)) int bar(int X) {
  53   /* PROF-LABEL: define {{.*}} @bar(
  54      PROF: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD2:[0-9]+]]
  55   */
  56   return X <= 0 ? -X : X;
  57 }
  58
  59 /*
  60 PROF: ![[ENT]] = !{!"function_entry_count", i64 2}
  61 PROF: ![[PD1]] = !{!"branch_weights", i32 2, i32 2}
  62 */