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// RUN: %clang_profgen -DCHECK_SYMBOLS -O3 -o %t.symbols %s
// RUN: llvm-nm %t.symbols | FileCheck %s --check-prefix=CHECK-SYMBOLS
// RUN: %clang_profgen -O3 -o %t %s
// RUN: %run %t %t.profraw
// RUN: llvm-profdata merge -o %t.profdata %t.profraw
// RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s
// This usage of llvm-nm assumes executables have symbol tables. They do not in
// an MSVC environment, so we can't make this test portable.
// UNSUPPORTED: target={{.*msvc.*}}
// The MinGW CRT init files do reference malloc etc, so this test fails.
// UNSUPPORTED: target={{.*windows-gnu.*}}
#include <stdint.h>
#include <stdlib.h>
#ifndef CHECK_SYMBOLS
#include <stdio.h>
#endif
int __llvm_profile_runtime = 0;
uint64_t __llvm_profile_get_size_for_buffer(void);
int __llvm_profile_write_buffer(char *);
int __llvm_profile_merge_from_buffer(const char *, uint64_t Size);
int write_buffer(uint64_t, const char *);
int main(int argc, const char *argv[]) {
// CHECK-LABEL: define {{.*}} @main(
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof ![[PD1:[0-9]+]]
if (argc < 2)
return 1;
const uint64_t MaxSize = 10000;
static char Buffer[MaxSize];
uint64_t Size = __llvm_profile_get_size_for_buffer();
if (Size > MaxSize)
return 1;
int Write = __llvm_profile_write_buffer(Buffer);
if (Write)
return Write;
#ifdef CHECK_SYMBOLS
// Don't write it out. Since we're checking the symbols, we don't have libc
// available.
// Call merge function to make sure it does not bring in libc deps:
__llvm_profile_merge_from_buffer(Buffer, Size);
return 0;
#else
// Actually write it out so we can FileCheck the output.
FILE *File = fopen(argv[1], "w");
if (!File)
return 1;
if (fwrite(Buffer, 1, Size, File) != Size)
return 1;
return fclose(File);
#endif
}
// CHECK: ![[PD1]] = !{!"branch_weights", i32 1, i32 2}
// CHECK-SYMBOLS-NOT: {{ }}___cxx_global_var_init
// CHECK-SYMBOLS-NOT: {{ }}___llvm_profile_register_write_file_atexit
// CHECK-SYMBOLS-NOT: {{ }}___llvm_profile_set_filename
// CHECK-SYMBOLS-NOT: {{ }}___llvm_profile_write_file
// CHECK-SYMBOLS-NOT: {{ }}_fdopen
// CHECK-SYMBOLS-NOT: {{ }}_fopen
// CHECK-SYMBOLS-NOT: {{ }}_fwrite
// CHECK-SYMBOLS-NOT: {{ }}_getenv
// CHECK-SYMBOLS-NOT: {{ }}getenv
// CHECK-SYMBOLS-NOT: {{ }}_malloc
// CHECK-SYMBOLS-NOT: {{ }}malloc
// CHECK-SYMBOLS-NOT: {{ }}_calloc
// CHECK-SYMBOLS-NOT: {{ }}calloc
// CHECK-SYMBOLS-NOT: {{ }}_free
// CHECK-SYMBOLS-NOT: {{ }}free
// CHECK-SYMBOLS-NOT: {{ }}_open
// CHECK-SYMBOLS-NOT: {{ }}_getpagesize
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