1; RUN: llc < %s -mtriple=arm64-apple-ios7.0.0 |  FileCheck %s
2; RUN: llc < %s -mtriple=arm64-apple-ios7.0.0 -O0 -pass-remarks-missed=gisel* -global-isel-abort=2 |  FileCheck %s --check-prefixes=GISEL,FALLBACK
3
4target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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
11; FALLBACK-NOT: remark{{.*}}clrsb32
12define i32 @clrsb32(i32 %x) #2 {
13entry:
14  %shr = ashr i32 %x, 31
15  %xor = xor i32 %shr, %x
16  %mul = shl i32 %xor, 1
17  %add = or i32 %mul, 1
18  %0 = tail call i32 @llvm.ctlz.i32(i32 %add, i1 false)
19
20  ret i32 %0
21; CHECK-LABEL: clrsb32
22; CHECK:   cls [[TEMP:w[0-9]+]], [[TEMP]]
23
24; GISEL-LABEL: clrsb32
25; GISEL: cls [[TEMP:w[0-9]+]], [[TEMP]]
26}
27
28; Function Attrs: nounwind ssp
29; FALLBACK-NOT: remark{{.*}}clrsb64
30define i64 @clrsb64(i64 %x) #3 {
31entry:
32  %shr = ashr i64 %x, 63
33  %xor = xor i64 %shr, %x
34  %mul = shl nsw i64 %xor, 1
35  %add = or i64 %mul, 1
36  %0 = tail call i64 @llvm.ctlz.i64(i64 %add, i1 false)
37
38  ret i64 %0
39; CHECK-LABEL: clrsb64
40; CHECK:   cls [[TEMP:x[0-9]+]], [[TEMP]]
41; GISEL-LABEL: clrsb64
42; GISEL:   cls [[TEMP:x[0-9]+]], [[TEMP]]
43}
44