llvm/benchmarks/GetIntrinsicForClangBuiltin.cpp

   1 #include "benchmark/benchmark.h"
   2 #include "llvm/IR/Intrinsics.h"
   3
   4 using namespace llvm;
   5 using namespace Intrinsic;
   6
   7 // Benchmark intrinsic lookup from a variety of targets.
   8 static void BM_GetIntrinsicForClangBuiltin(benchmark::State &state) {
   9   static const char *Builtins[] = {
  10       "__builtin_adjust_trampoline",
  11       "__builtin_trap",
  12       "__builtin_arm_ttest",
  13       "__builtin_amdgcn_cubetc",
  14       "__builtin_amdgcn_udot2",
  15       "__builtin_arm_stc",
  16       "__builtin_bpf_compare",
  17       "__builtin_HEXAGON_A2_max",
  18       "__builtin_lasx_xvabsd_b",
  19       "__builtin_mips_dlsa",
  20       "__nvvm_floor_f",
  21       "__builtin_altivec_vslb",
  22       "__builtin_r600_read_tgid_x",
  23       "__builtin_riscv_aes64im",
  24       "__builtin_s390_vcksm",
  25       "__builtin_ve_vl_pvfmksge_Mvl",
  26       "__builtin_ia32_axor64",
  27       "__builtin_bitrev",
  28   };
  29   static const char *Targets[] = {"",     "aarch64", "amdgcn", "mips",
  30                                   "nvvm", "r600",    "riscv"};
  31
  32   for (auto _ : state) {
  33     for (auto Builtin : Builtins)
  34       for (auto Target : Targets)
  35         getIntrinsicForClangBuiltin(Target, Builtin);
  36   }
  37 }
  38
  39 static void
  40 BM_GetIntrinsicForClangBuiltinHexagonFirst(benchmark::State &state) {
  41   // Exercise the worst case by looking for the first builtin for a target
  42   // that has a lot of builtins.
  43   for (auto _ : state)
  44     getIntrinsicForClangBuiltin("hexagon", "__builtin_HEXAGON_A2_abs");
  45 }
  46
  47 BENCHMARK(BM_GetIntrinsicForClangBuiltin);
  48 BENCHMARK(BM_GetIntrinsicForClangBuiltinHexagonFirst);
  49
  50 BENCHMARK_MAIN();