1 // RUN: %clang_profgen -O2 -o %t %s 2 // RUN: %run %t %t.profraw 1 1 3 // RUN: llvm-profdata show --all-functions --counts %t.profraw | FileCheck %s 4 5 #include <stdint.h> 6 #include <stdio.h> 7 #include <stdlib.h> 8 9 int __llvm_profile_runtime = 0; 10 uint64_t __llvm_profile_get_size_for_buffer(void); 11 int __llvm_profile_write_buffer(char *); 12 void __llvm_profile_reset_counters(void); 13 void __llvm_profile_merge_from_buffer(const char *, uint64_t); 14 15 int dumpBuffer(const char *FileN, const char *Buffer, uint64_t Size) { 16 FILE *File = fopen(FileN, "w"); 17 if (!File) 18 return 1; 19 if (fwrite(Buffer, 1, Size, File) != Size) 20 return 1; 21 return fclose(File); 22 } 23 24 int g = 0; 25 void foo(char c) { 26 if (c == '1') 27 g++; 28 else 29 g--; 30 } 31 32 /* This function is not profiled */ 33 void bar(int M) { g += M; } 34 35 int main(int argc, const char *argv[]) { 36 int i; 37 if (argc < 4) 38 return 1; 39 40 const uint64_t MaxSize = 10000; 41 static char Buffer[MaxSize]; 42 43 uint64_t Size = __llvm_profile_get_size_for_buffer(); 44 if (Size > MaxSize) 45 return 1; 46 47 /* Start profiling. */ 48 __llvm_profile_reset_counters(); 49 foo(argv[2][0]); 50 /* End profiling by freezing counters. */ 51 if (__llvm_profile_write_buffer(Buffer)) 52 return 1; 53 54 /* Its profile will be discarded. */ 55 for (i = 0; i < 10; i++) 56 bar(1); 57 58 /* Start profiling again and merge in previously 59 saved counters in buffer. */ 60 __llvm_profile_reset_counters(); 61 __llvm_profile_merge_from_buffer(Buffer, Size); 62 foo(argv[3][0]); 63 /* End profiling */ 64 if (__llvm_profile_write_buffer(Buffer)) 65 return 1; 66 67 /* Its profile will be discarded. */ 68 bar(2); 69 70 /* Now it is time to dump the profile to file. */ 71 return dumpBuffer(argv[1], Buffer, Size); 72 } 73 74 // Not profiled 75 // CHECK-LABEL: dumpBuffer: 76 // CHECK: Counters: 3 77 // CHECK-NEXT: Function count: 0 78 // CHECK-NEXT: Block counts: [0, 0] 79 80 // Profiled with entry count == 2 81 // CHECK-LABEL: foo: 82 // CHECK: Counters: 2 83 // CHECK-NEXT: Function count: 2 84 // CHECK-NEXT: Block counts: [2] 85 86 // Not profiled 87 // CHECK-LABEL: bar: 88 // CHECK: Counters: 1 89 // CHECK-NEXT Function count: 0 90 // CHECK-NEXT Block counts: [] 91 92 // Not profiled 93 // CHECK-LABEL: main: 94 // CHECK: Counters: 6 95 // CHECK-NEXT: Function count: 0 96 // CHECK-NEXT: Block counts: [0, 0, 0, 0, 0] 97
