63 lines · c
1/*2RUN: rm -fr %t.profdir3RUN: %clang_profgen=%t.profdir/default_%m.profraw -o %t -O2 %s4RUN: %run %t 2>&1 | FileCheck %s --check-prefix=NO_EXIT_WRITE5RUN: llvm-profdata merge -o %t.profdata %t.profdir6RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s --check-prefix=PROF7 8NO_EXIT_WRITE: Profile data not written to file: already written9*/10 11int __llvm_profile_dump(void);12void __llvm_profile_reset_counters(void);13int foo(int);14int bar(int);15int skip(int);16 17int 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/*60PROF: ![[ENT]] = !{!"function_entry_count", i64 2} 61PROF: ![[PD1]] = !{!"branch_weights", i32 2, i32 2}62*/63