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| // RUN: %clang_profgen -mllvm --enable-value-profiling=true -mllvm -vp-static-alloc=true -mllvm -vp-counters-per-site=3 -O2 -o %t %s
// RUN: %run %t %t.profraw
// RUN: llvm-profdata merge -o %t.profdata %t.profraw
// RUN: llvm-profdata show --all-functions --counts --ic-targets %t.profdata > %t.profdump
// RUN: FileCheck --input-file %t.profdump %s --check-prefix=FOO
// RUN: FileCheck --input-file %t.profdump %s --check-prefix=BAR
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
int __llvm_profile_runtime = 0;
int __llvm_profile_write_file();
void __llvm_profile_reset_counters(void);
void __llvm_profile_merge_from_buffer(const char *, uint64_t);
void __llvm_profile_set_filename(const char *);
struct __llvm_profile_data;
struct ValueProfData;
void lprofMergeValueProfData(struct ValueProfData *, struct __llvm_profile_data *);
/* Force the vp merger module to be linked in. */
void *Dummy = &lprofMergeValueProfData;
void callee1() {}
void callee2() {}
void callee3() {}
typedef void (*FP)(void);
FP Fps[3] = {callee1, callee2, callee3};
void foo(int N) {
int I, J;
for (I = 0; I < 3; I++)
for (J = 0; J < I * 2 + 1; J++)
Fps[I]();
if (N < 2)
return;
for (I = 0; I < 3; I++)
for (J = 0; J < I * 2 + 1; J++)
Fps[2 - I]();
}
/* This function is not profiled */
void bar(void) {
int I;
for (I = 0; I < 20; I++)
Fps[I % 3]();
}
int main(int argc, const char *argv[]) {
int i;
if (argc < 2)
return 1;
const char *FileN = argv[1];
__llvm_profile_set_filename(FileN);
/* Start profiling. */
__llvm_profile_reset_counters();
foo(1);
/* End profiling by freezing counters and
* dump them to the file. */
if (__llvm_profile_write_file())
return 1;
/* Read profile data into buffer. */
FILE *File = fopen(FileN, "r");
if (!File)
return 1;
fseek(File, 0, SEEK_END);
uint64_t Size = ftell(File);
fseek(File, 0, SEEK_SET);
char *Buffer = (char *)malloc(Size);
if (Size != fread(Buffer, 1, Size, File))
return 1;
fclose(File);
/* Its profile will be discarded. */
for (i = 0; i < 10; i++)
bar();
/* Start profiling again and merge in previously
saved counters in buffer. */
__llvm_profile_reset_counters();
__llvm_profile_merge_from_buffer(Buffer, Size);
foo(2);
/* End profiling. */
truncate(FileN, 0);
if (__llvm_profile_write_file())
return 1;
/* Its profile will be discarded. */
bar();
return 0;
}
// FOO-LABEL: foo:
// FOO: Indirect Target Results:
// FOO-NEXT: [ 0, callee3, 10 ]
// FOO-NEXT: [ 0, callee2, 6 ]
// FOO-NEXT: [ 0, callee1, 2 ]
// FOO-NEXT: [ 1, callee1, 5 ]
// FOO-NEXT: [ 1, callee2, 3 ]
// FOO-NEXT: [ 1, callee3, 1 ]
// BAR-LABEL: bar:
// BAR: [ 0, callee1, 0 ]
// BAR-NEXT: [ 0, callee2, 0 ]
// BAR-NEXT: [ 0, callee3, 0 ]
|