1// RUN: %clang_profgen -O2 -o %t %s
2// RUN: %run %t %t.profraw 1 1
3// RUN: llvm-profdata show --all-functions --counts %t.profraw | FileCheck %s
4
5// FIXME: llvm-profdata exits with "Malformed instrumentation profile data"
6// XFAIL: msvc
7
8#include <stdint.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include "profile_test.h"
12
13int __llvm_profile_runtime = 0;
14uint64_t __llvm_profile_get_size_for_buffer(void);
15int __llvm_profile_write_buffer(char *);
16void __llvm_profile_reset_counters(void);
17void __llvm_profile_merge_from_buffer(const char *, uint64_t);
18
19int dumpBuffer(const char *FileN, const char *Buffer, uint64_t Size) {
20 FILE *File = fopen(FileN, "w");
21 if (!File)
22 return 1;
23 if (fwrite(Buffer, 1, Size, File) != Size)
24 return 1;
25 return fclose(File);
26}
27
28int g = 0;
29void foo(char c) {
30 if (c == '1')
31 g++;
32 else
33 g--;
34}
35
36/* This function is not profiled */
37void bar(int M) { g += M; }
38
39int main(int argc, const char *argv[]) {
40 int i;
41 if (argc < 4)
42 return 1;
43
44 const uint64_t MaxSize = 10000;
45 static ALIGNED(sizeof(uint64_t)) char Buffer[MaxSize];
46
47 uint64_t Size = __llvm_profile_get_size_for_buffer();
48 if (Size > MaxSize)
49 return 1;
50
51 /* Start profiling. */
52 __llvm_profile_reset_counters();
53 foo(argv[2][0]);
54 /* End profiling by freezing counters. */
55 if (__llvm_profile_write_buffer(Buffer))
56 return 1;
57
58 /* Its profile will be discarded. */
59 for (i = 0; i < 10; i++)
60 bar(1);
61
62 /* Start profiling again and merge in previously
63 saved counters in buffer. */
64 __llvm_profile_reset_counters();
65 __llvm_profile_merge_from_buffer(Buffer, Size);
66 foo(argv[3][0]);
67 /* End profiling */
68 if (__llvm_profile_write_buffer(Buffer))
69 return 1;
70
71 /* Its profile will be discarded. */
72 bar(2);
73
74 /* Now it is time to dump the profile to file. */
75 return dumpBuffer(argv[1], Buffer, Size);
76}
77
78// Not profiled
79// CHECK-LABEL: dumpBuffer:
80// CHECK: Counters: 3
81// CHECK-NEXT: Function count: 0
82// CHECK-NEXT: Block counts: [0, 0]
83
84// Profiled with entry count == 2
85// CHECK-LABEL: foo:
86// CHECK: Counters: 2
87// CHECK-NEXT: Function count: 2
88// CHECK-NEXT: Block counts: [2]
89
90// Not profiled
91// CHECK-LABEL: bar:
92// CHECK: Counters: 1
93// CHECK-NEXT: Function count: 0
94// CHECK-NEXT: Block counts: []
95
96// Not profiled
97// CHECK-LABEL: main:
98// CHECK: Counters: 6
99// CHECK-NEXT: Function count: 0
100// CHECK-NEXT: Block counts: [0, 0, 0, 0, 0]
101