1 // RUN: %clang_profgen -DCHECK_SYMBOLS -O3 -o %t.symbols %s
2 // RUN: llvm-nm %t.symbols | FileCheck %s --check-prefix=CHECK-SYMBOLS
3 // RUN: %clang_profgen -O3 -o %t %s
4 // RUN: %run %t %t.profraw
5 // RUN: llvm-profdata merge -o %t.profdata %t.profraw
6 // RUN: %clang_profuse=%t.profdata -o - -S -emit-llvm %s | FileCheck %s
7
8 #include <stdint.h>
9 #include <stdlib.h>
10
11 #ifndef CHECK_SYMBOLS
12 #include <stdio.h>
13 #endif
14
15 int __llvm_profile_runtime = 0;
16 uint64_t __llvm_profile_get_size_for_buffer(void);
17 int __llvm_profile_write_buffer(char *);
18 int write_buffer(uint64_t, const char *);
main(int argc,const char * argv[])19 int main(int argc, const char *argv[]) {
20 // CHECK-LABEL: define i32 @main(
21 // CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}, !prof !1
22 if (argc < 2)
23 return 1;
24
25 const uint64_t MaxSize = 10000;
26 static char Buffer[MaxSize];
27
28 uint64_t Size = __llvm_profile_get_size_for_buffer();
29 if (Size > MaxSize)
30 return 1;
31 int Write = __llvm_profile_write_buffer(Buffer);
32 if (__llvm_profile_write_buffer(Buffer))
33 return Write;
34
35 #ifdef CHECK_SYMBOLS
36 // Don't write it out. Since we're checking the symbols, we don't have libc
37 // available.
38 return 0;
39 #else
40 // Actually write it out so we can FileCheck the output.
41 FILE *File = fopen(argv[1], "w");
42 if (!File)
43 return 1;
44 if (fwrite(Buffer, 1, Size, File) != Size)
45 return 1;
46 return fclose(File);
47 #endif
48 }
49 // CHECK: !1 = metadata !{metadata !"branch_weights", i32 1, i32 2}
50
51 // CHECK-SYMBOLS-NOT: ___cxx_global_var_init
52 // CHECK-SYMBOLS-NOT: ___llvm_profile_register_write_file_atexit
53 // CHECK-SYMBOLS-NOT: ___llvm_profile_set_filename
54 // CHECK-SYMBOLS-NOT: ___llvm_profile_write_file
55 // CHECK-SYMBOLS-NOT: _fdopen
56 // CHECK-SYMBOLS-NOT: _fopen
57 // CHECK-SYMBOLS-NOT: _fwrite
58 // CHECK-SYMBOLS-NOT: _getenv
59 // CHECK-SYMBOLS-NOT: _malloc
60 // CHECK-SYMBOLS-NOT: _open
61