65 lines
2.3 KiB
Plaintext
65 lines
2.3 KiB
Plaintext
; RUN: llvm-profgen --format=text --unsymbolized-profile=%S/Inputs/profile-density.raw.prof --binary=%S/Inputs/inline-noprobe2.perfbin --output=%t1 --use-offset=0 --show-density -hot-function-density-threshold=10 --trim-cold-profile=0 &> %t2
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; RUN: FileCheck %s --input-file %t2 --check-prefix=CHECK-DENSITY
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; RUN: llvm-profgen --format=text --unsymbolized-profile=%S/Inputs/profile-density-cs.raw.prof --binary=%S/Inputs/inline-noprobe2.perfbin --output=%t3 --show-density -hot-function-density-threshold=1 &> %t4
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; RUN: FileCheck %s --input-file %t4 --check-prefix=CHECK-DENSITY-CS
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;CHECK-DENSITY: AutoFDO is estimated to optimize better with 3.1x more samples. Please consider increasing sampling rate or profiling for longer duration to get more samples.
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;CHECK-DENSITY: Minimum profile density for hot functions with top 99.00% total samples: 3.2
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;CHECK-DENSITY-CS: Minimum profile density for hot functions with top 99.00% total samples: 128.3
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; original code:
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; clang -O3 -g -fno-optimize-sibling-calls -fdebug-info-for-profiling qsort.c -o a.out
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#include <stdio.h>
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#include <stdlib.h>
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void swap(int *a, int *b) {
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int t = *a;
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*a = *b;
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*b = t;
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}
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int partition_pivot_last(int* array, int low, int high) {
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int pivot = array[high];
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int i = low - 1;
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for (int j = low; j < high; j++)
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if (array[j] < pivot)
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swap(&array[++i], &array[j]);
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swap(&array[i + 1], &array[high]);
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return (i + 1);
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}
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int partition_pivot_first(int* array, int low, int high) {
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int pivot = array[low];
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int i = low + 1;
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for (int j = low + 1; j <= high; j++)
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if (array[j] < pivot) { if (j != i) swap(&array[i], &array[j]); i++;}
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swap(&array[i - 1], &array[low]);
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return i - 1;
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}
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void quick_sort(int* array, int low, int high, int (*partition_func)(int *, int, int)) {
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if (low < high) {
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int pi = (*partition_func)(array, low, high);
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quick_sort(array, low, pi - 1, partition_func);
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quick_sort(array, pi + 1, high, partition_func);
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}
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}
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int main() {
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const int size = 200;
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int sum = 0;
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int *array = malloc(size * sizeof(int));
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for(int i = 0; i < 100 * 1000; i++) {
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for(int j = 0; j < size; j++)
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array[j] = j % 10 ? rand() % size: j;
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int (*fptr)(int *, int, int) = i % 3 ? partition_pivot_last : partition_pivot_first;
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quick_sort(array, 0, size - 1, fptr);
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sum += array[i % size];
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}
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printf("sum=%d\n", sum);
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return 0;
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}
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