1 ; 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 -profile-density-threshold=10 --trim-cold-profile=0 &> %t2
2 ; RUN: FileCheck %s --input-file %t2 --check-prefix=CHECK-DENSITY
3 ; RUN: llvm-profgen --format=text --unsymbolized-profile=%S/Inputs/profile-density-cs.raw.prof --binary=%S/Inputs/inline-noprobe2.perfbin --output=%t3 --show-density -profile-density-threshold=1 -profile-density-threshold=10000 &> %t4
4 ; RUN: FileCheck %s --input-file %t4 --check-prefix=CHECK-DENSITY-CS
5 ; RUN: llvm-profgen --format=text --unsymbolized-profile=%S/Inputs/profile-density-cs.raw.prof --binary=%S/Inputs/inline-noprobe2.perfbin --output=%t5 --show-density -profile-density-threshold=1 -profile-density-cutoff-hot=800000 &> %t6
6 ; RUN: FileCheck %s --input-file %t6 --check-prefix=CHECK-DENSITY-CS-80
8 ;CHECK-DENSITY: Sample PGO is estimated to optimize better with 2.9x more samples. Please consider increasing sampling rate or profiling for longer duration to get more samples.
9 ;CHECK-DENSITY: Functions with density >= 3.5 account for 99.00% total sample counts.
11 ;CHECK-DENSITY-CS: Sample PGO is estimated to optimize better with 12.5x more samples. Please consider increasing sampling rate or profiling for longer duration to get more samples.
12 ;CHECK-DENSITY-CS: Functions with density >= 800.1 account for 99.00% total sample counts.
14 ;CHECK-DENSITY-CS-80: Functions with density >= 1886.2 account for 80.00% total sample counts.
17 ; clang -O3 -g -fno-optimize-sibling-calls -fdebug-info-for-profiling qsort.c -o a.out
21 void swap(int *a, int *b) {
27 int partition_pivot_last(int* array, int low, int high) {
28 int pivot = array[high];
30 for (int j = low; j < high; j++)
32 swap(&array[++i], &array[j]);
33 swap(&array[i + 1], &array[high]);
37 int partition_pivot_first(int* array, int low, int high) {
38 int pivot = array[low];
40 for (int j = low + 1; j <= high; j++)
41 if (array[j] < pivot) { if (j != i) swap(&array[i], &array[j]); i++;}
42 swap(&array[i - 1], &array[low]);
46 void quick_sort(int* array, int low, int high, int (*partition_func)(int *, int, int)) {
48 int pi = (*partition_func)(array, low, high);
49 quick_sort(array, low, pi - 1, partition_func);
50 quick_sort(array, pi + 1, high, partition_func);
57 int *array = malloc(size * sizeof(int));
58 for(int i = 0; i < 100 * 1000; i++) {
59 for(int j = 0; j < size; j++)
60 array[j] = j % 10 ? rand() % size: j;
61 int (*fptr)(int *, int, int) = i % 3 ? partition_pivot_last : partition_pivot_first;
62 quick_sort(array, 0, size - 1, fptr);
63 sum += array[i % size];
65 printf("sum=%d\n", sum);