external/bsd/llvm/dist/clang/test/Profile/c-attributes.c

   1 // Test that instrumentation based profiling sets function attributes correctly.
   2
   3 // RUN: llvm-profdata merge %S/Inputs/c-attributes.proftext -o %t.profdata
   4 // RUN: %clang %s -o - -mllvm -disable-llvm-optzns -emit-llvm -S -fprofile-instr-use=%t.profdata | FileCheck %s
   5
   6 extern int atoi(const char *);
   7
   8 // CHECK: hot_100_percent(i32{{.*}}%i) [[HOT:#[0-9]+]]
   9 void hot_100_percent(int i) {
  10   while (i > 0)
  11     i--;
  12 }
  13
  14 // CHECK: hot_40_percent(i32{{.*}}%i) [[HOT]]
  15 void hot_40_percent(int i) {
  16   while (i > 0)
  17     i--;
  18 }
  19
  20 // CHECK: normal_func(i32{{.*}}%i) [[NORMAL:#[0-9]+]]
  21 void normal_func(int i) {
  22   while (i > 0)
  23     i--;
  24 }
  25
  26 // CHECK: cold_func(i32{{.*}}%i) [[COLD:#[0-9]+]]
  27 void cold_func(int i) {
  28   while (i > 0)
  29     i--;
  30 }
  31
  32 // CHECK: attributes [[HOT]] = { inlinehint nounwind {{.*}} }
  33 // CHECK: attributes [[NORMAL]] = { nounwind {{.*}} }
  34 // CHECK: attributes [[COLD]] = { cold nounwind {{.*}} }
  35
  36 int main(int argc, const char *argv[]) {
  37   int max = atoi(argv[1]);
  38   int i;
  39   for (i = 0; i < max; i++)
  40     hot_100_percent(i);
  41   for (i = 0; i < max * 4 / 10; i++)
  42     hot_40_percent(i);
  43   for (i = 0; i < max * 2 / 10; i++)
  44     normal_func(i);
  45   for (i = 0; i < max / 200; i++)
  46     cold_func(i);
  47   return 0;
  48 }