1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt < %s -instcombine -S | FileCheck %s
3
4@hello = constant [6 x i8] c"hello\00"
5@null = constant [1 x i8] zeroinitializer
6
7declare i8* @strndup(i8*, i32)
8
9define i8* @test1() {
10; CHECK-LABEL: @test1(
11; CHECK-NEXT:    [[STRDUP:%.*]] = call dereferenceable_or_null(1) i8* @strdup(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @null, i64 0, i64 0))
12; CHECK-NEXT:    ret i8* [[STRDUP]]
13;
14  %src = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
15  %ret = call i8* @strndup(i8* %src, i32 0)
16  ret i8* %ret
17}
18
19define i8* @test2() {
20; CHECK-LABEL: @test2(
21; CHECK-NEXT:    [[RET:%.*]] = call dereferenceable_or_null(5) i8* @strndup(i8* dereferenceable(6) getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0), i32 4)
22; CHECK-NEXT:    ret i8* [[RET]]
23;
24  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
25  %ret = call i8* @strndup(i8* %src, i32 4)
26  ret i8* %ret
27}
28
29define i8* @test3() {
30; CHECK-LABEL: @test3(
31; CHECK-NEXT:    [[STRDUP:%.*]] = call dereferenceable_or_null(6) i8* @strdup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0))
32; CHECK-NEXT:    ret i8* [[STRDUP]]
33;
34  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
35  %ret = call i8* @strndup(i8* %src, i32 5)
36  ret i8* %ret
37}
38
39define i8* @test4() {
40; CHECK-LABEL: @test4(
41; CHECK-NEXT:    [[STRDUP:%.*]] = call dereferenceable_or_null(6) i8* @strdup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0))
42; CHECK-NEXT:    ret i8* [[STRDUP]]
43;
44  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
45  %ret = call i8* @strndup(i8* %src, i32 6)
46  ret i8* %ret
47}
48
49define i8* @test5() {
50; CHECK-LABEL: @test5(
51; CHECK-NEXT:    [[STRDUP:%.*]] = call dereferenceable_or_null(6) i8* @strdup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0))
52; CHECK-NEXT:    ret i8* [[STRDUP]]
53;
54  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
55  %ret = call i8* @strndup(i8* %src, i32 7)
56  ret i8* %ret
57}
58
59define i8* @test6(i32 %n) {
60; CHECK-LABEL: @test6(
61; CHECK-NEXT:    [[RET:%.*]] = call i8* @strndup(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @hello, i64 0, i64 0), i32 [[N:%.*]])
62; CHECK-NEXT:    ret i8* [[RET]]
63;
64  %src = getelementptr [6 x i8], [6 x i8]* @hello, i32 0, i32 0
65  %ret = call i8* @strndup(i8* %src, i32 %n)
66  ret i8* %ret
67}
68