1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -instcombine -S < %s | FileCheck %s
3
4define i32 @cttz_neg_value(i32 %x) {
5; CHECK-LABEL: @cttz_neg_value(
6; CHECK-NEXT:    [[B:%.*]] = call i32 @llvm.cttz.i32(i32 [[X:%.*]], i1 false), !range !0
7; CHECK-NEXT:    ret i32 [[B]]
8;
9  %a = sub i32 0, %x
10  %b = tail call i32 @llvm.cttz.i32(i32 %a)
11  ret i32 %b
12}
13
14define i32 @cttz_neg_value_multiuse(i32 %x) {
15; CHECK-LABEL: @cttz_neg_value_multiuse(
16; CHECK-NEXT:    [[A:%.*]] = sub i32 0, [[X:%.*]]
17; CHECK-NEXT:    call void @use(i32 [[A]])
18; CHECK-NEXT:    [[B:%.*]] = call i32 @llvm.cttz.i32(i32 [[X]], i1 false), !range !0
19; CHECK-NEXT:    ret i32 [[B]]
20;
21  %a = sub i32 0, %x
22  call void @use(i32 %a)
23  %b = tail call i32 @llvm.cttz.i32(i32 %a)
24  ret i32 %b
25}
26
27define i64 @cttz_neg_value_64(i64 %x) {
28; CHECK-LABEL: @cttz_neg_value_64(
29; CHECK-NEXT:    [[B:%.*]] = tail call i64 @llvm.cttz.i64(i64 [[X:%.*]], i1 true), !range !1
30; CHECK-NEXT:    ret i64 [[B]]
31;
32  %a = sub i64 0, %x
33  %b = tail call i64 @llvm.cttz.i64(i64 %a, i1 true)
34  ret i64 %b
35}
36
37define i64 @cttz_neg_value2_64(i64 %x) {
38; CHECK-LABEL: @cttz_neg_value2_64(
39; CHECK-NEXT:    [[B:%.*]] = tail call i64 @llvm.cttz.i64(i64 [[X:%.*]], i1 false), !range !1
40; CHECK-NEXT:    ret i64 [[B]]
41;
42  %a = sub i64 0, %x
43  %b = tail call i64 @llvm.cttz.i64(i64 %a, i1 false)
44  ret i64 %b
45}
46
47define <2 x i64> @cttz_neg_value_vec(<2 x i64> %x) {
48; CHECK-LABEL: @cttz_neg_value_vec(
49; CHECK-NEXT:    [[B:%.*]] = call <2 x i64> @llvm.cttz.v2i64(<2 x i64> [[X:%.*]], i1 false)
50; CHECK-NEXT:    ret <2 x i64> [[B]]
51;
52  %a = sub  <2 x i64> zeroinitializer, %x
53  %b = tail call <2 x i64> @llvm.cttz.v2i64(<2 x i64> %a)
54  ret <2 x i64> %b
55}
56
57; Negative tests
58
59define i32 @cttz_nonneg_value(i32 %x) {
60; CHECK-LABEL: @cttz_nonneg_value(
61; CHECK-NEXT:    [[A:%.*]] = sub i32 1, [[X:%.*]]
62; CHECK-NEXT:    [[B:%.*]] = call i32 @llvm.cttz.i32(i32 [[A]], i1 false), !range !0
63; CHECK-NEXT:    ret i32 [[B]]
64;
65  %a = sub i32 1, %x
66  %b = tail call i32 @llvm.cttz.i32(i32 %a)
67  ret i32 %b
68}
69
70define <2 x i64> @cttz_nonneg_value_vec(<2 x i64> %x) {
71; CHECK-LABEL: @cttz_nonneg_value_vec(
72; CHECK-NEXT:    [[A:%.*]] = sub <2 x i64> <i64 1, i64 0>, [[X:%.*]]
73; CHECK-NEXT:    [[B:%.*]] = call <2 x i64> @llvm.cttz.v2i64(<2 x i64> [[A]], i1 false)
74; CHECK-NEXT:    ret <2 x i64> [[B]]
75;
76  %a = sub  <2 x i64> <i64 1, i64 0>, %x
77  %b = tail call <2 x i64> @llvm.cttz.v2i64(<2 x i64> %a)
78  ret <2 x i64> %b
79}
80
81declare void @use(i32 %a)
82declare i32 @llvm.cttz.i32(i32)
83declare i64 @llvm.cttz.i64(i64, i1)
84declare <2 x i64> @llvm.cttz.v2i64(<2 x i64>)
85