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; RUN: llvm-profgen --format=text --perfscript=%s --binary=%S/Inputs/fs-discriminator-probe.perfbin --output=%t --show-pseudo-probe --show-disassembly-only | FileCheck %s
; CHECK: <quick_sort>:
; CHECK: [Probe]: FUNC: quick_sort Index: 1 Type: Block
; CHECK: [Probe]: FUNC: quick_sort Index: 1 Discriminator: 15360 Type: Block
; CHECK: [Probe]: FUNC: quick_sort Index: 4 Type: IndirectCall
; CHECK: [Probe]: FUNC: quick_sort Index: 5 Type: DirectCall
; original code:
; clang -O3 -g -mllvm --enable-fs-discriminator -fdebug-info-for-profiling -fpseudo-probe-for-profiling qsort.c -o a.out
#include <stdio.h>
#include <stdlib.h>
void swap(int *a, int *b) {
int t = *a;
*a = *b;
*b = t;
}
int partition_pivot_last(int* array, int low, int high) {
int pivot = array[high];
int i = low - 1;
for (int j = low; j < high; j++)
if (array[j] < pivot)
swap(&array[++i], &array[j]);
swap(&array[i + 1], &array[high]);
return (i + 1);
}
int partition_pivot_first(int* array, int low, int high) {
int pivot = array[low];
int i = low + 1;
for (int j = low + 1; j <= high; j++)
if (array[j] < pivot) { if (j != i) swap(&array[i], &array[j]); i++;}
swap(&array[i - 1], &array[low]);
return i - 1;
}
void quick_sort(int* array, int low, int high, int (*partition_func)(int *, int, int)) {
if (low < high) {
int pi = (*partition_func)(array, low, high);
quick_sort(array, low, pi - 1, partition_func);
quick_sort(array, pi + 1, high, partition_func);
}
}
int main() {
const int size = 200;
int sum = 0;
int *array = malloc(size * sizeof(int));
for(int i = 0; i < 100 * 1000; i++) {
for(int j = 0; j < size; j++)
array[j] = j % 10 ? rand() % size: j;
int (*fptr)(int *, int, int) = i % 3 ? partition_pivot_last : partition_pivot_first;
quick_sort(array, 0, size - 1, fptr);
sum += array[i % size];
}
printf("sum=%d\n", sum);
return 0;
}
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