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// RUN: %clang_profgen -O2 -o %t %s
// RUN: %run %t %t.profraw 1 1
// RUN: llvm-profdata show --all-functions --counts %t.profraw | FileCheck %s
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
int __llvm_profile_runtime = 0;
uint64_t __llvm_profile_get_size_for_buffer(void);
int __llvm_profile_write_buffer(char *);
void __llvm_profile_reset_counters(void);
void __llvm_profile_merge_from_buffer(const char *, uint64_t);
int dumpBuffer(const char *FileN, const char *Buffer, uint64_t Size) {
FILE *File = fopen(FileN, "w");
if (!File)
return 1;
if (fwrite(Buffer, 1, Size, File) != Size)
return 1;
return fclose(File);
}
int g = 0;
void foo(char c) {
if (c == '1')
g++;
else
g--;
}
/* This function is not profiled */
void bar(int M) { g += M; }
int main(int argc, const char *argv[]) {
int i;
if (argc < 4)
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;
/* Start profiling. */
__llvm_profile_reset_counters();
foo(argv[2][0]);
/* End profiling by freezing counters. */
if (__llvm_profile_write_buffer(Buffer))
return 1;
/* Its profile will be discarded. */
for (i = 0; i < 10; i++)
bar(1);
/* Start profiling again and merge in previously
saved counters in buffer. */
__llvm_profile_reset_counters();
__llvm_profile_merge_from_buffer(Buffer, Size);
foo(argv[3][0]);
/* End profiling */
if (__llvm_profile_write_buffer(Buffer))
return 1;
/* Its profile will be discarded. */
bar(2);
/* Now it is time to dump the profile to file. */
return dumpBuffer(argv[1], Buffer, Size);
}
// Not profiled
// CHECK-LABEL: dumpBuffer:
// CHECK: Counters: 3
// CHECK-NEXT: Function count: 0
// CHECK-NEXT: Block counts: [0, 0]
// Profiled with entry count == 2
// CHECK-LABEL: foo:
// CHECK: Counters: 2
// CHECK-NEXT: Function count: 2
// CHECK-NEXT: Block counts: [2]
// Not profiled
// CHECK-LABEL: bar:
// CHECK: Counters: 1
// CHECK-NEXT Function count: 0
// CHECK-NEXT Block counts: []
// Not profiled
// CHECK-LABEL: main:
// CHECK: Counters: 6
// CHECK-NEXT: Function count: 0
// CHECK-NEXT: Block counts: [0, 0, 0, 0, 0]
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