clang/test/CodeGen/count-builtins.c

   1 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
   2
   3 int leading, trailing, pop;
   4
   5 void test_i16(short P) {
   6   leading = __builtin_clzs(P);
   7   trailing = __builtin_ctzs(P);
   8
   9 // CHECK: @test_i16
  10 // CHECK: call i16 @llvm.ctlz.i16
  11 // CHECK: call i16 @llvm.cttz.i16
  12 }
  13
  14 void test_i32(int P) {
  15   leading = __builtin_clz(P);
  16   trailing = __builtin_ctz(P);
  17   pop = __builtin_popcount(P);
  18
  19 // CHECK: @test_i32
  20 // CHECK: call i32 @llvm.ctlz.i32
  21 // CHECK: call i32 @llvm.cttz.i32
  22 // CHECK: call i32 @llvm.ctpop.i32
  23 }
  24
  25 void test_i64(float P) {
  26   leading = __builtin_clzll(P);
  27   trailing = __builtin_ctzll(P);
  28   pop = __builtin_popcountll(P);
  29 // CHECK: @test_i64
  30 // CHECK: call i64 @llvm.ctlz.i64
  31 // CHECK: call i64 @llvm.cttz.i64
  32 // CHECK: call i64 @llvm.ctpop.i64
  33 }