1; RUN: llc < %s -march=arm64 |  FileCheck %s
2
3target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
4target triple = "arm64-apple-ios7.0.0"
5
6; Function Attrs: nounwind readnone
7declare i32 @llvm.ctlz.i32(i32, i1) #0
8declare i64 @llvm.ctlz.i64(i64, i1) #1
9
10; Function Attrs: nounwind ssp
11define i32 @clrsb32(i32 %x) #2 {
12entry:
13  %shr = ashr i32 %x, 31
14  %xor = xor i32 %shr, %x
15  %mul = shl i32 %xor, 1
16  %add = or i32 %mul, 1
17  %0 = tail call i32 @llvm.ctlz.i32(i32 %add, i1 false)
18
19  ret i32 %0
20; CHECK-LABEL: clrsb32
21; CHECK:   cls [[TEMP:w[0-9]+]], [[TEMP]]
22}
23
24; Function Attrs: nounwind ssp
25define i64 @clrsb64(i64 %x) #3 {
26entry:
27  %shr = ashr i64 %x, 63
28  %xor = xor i64 %shr, %x
29  %mul = shl nsw i64 %xor, 1
30  %add = or i64 %mul, 1
31  %0 = tail call i64 @llvm.ctlz.i64(i64 %add, i1 false)
32
33  ret i64 %0
34; CHECK-LABEL: clrsb64
35; CHECK:   cls [[TEMP:x[0-9]+]], [[TEMP]]
36}
37