1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; Test that the strpbrk library call simplifier works correctly.
3;
4; RUN: opt < %s -instcombine -S | FileCheck %s
5
6target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
7
8@hello = constant [12 x i8] c"hello world\00"
9@w = constant [2 x i8] c"w\00"
10@null = constant [1 x i8] zeroinitializer
11
12declare i8* @strpbrk(i8*, i8*)
13
14; Check strpbrk(s, "") -> NULL.
15
16define i8* @test_simplify1(i8* %str) {
17; CHECK-LABEL: @test_simplify1(
18; CHECK-NEXT:    ret i8* null
19;
20  %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
21
22  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
23  ret i8* %ret
24}
25
26; Check strpbrk("", s) -> NULL.
27
28define i8* @test_simplify2(i8* %pat) {
29; CHECK-LABEL: @test_simplify2(
30; CHECK-NEXT:    ret i8* null
31;
32  %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
33
34  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
35  ret i8* %ret
36}
37
38; Check strpbrk(s1, s2), where s1 and s2 are constants.
39
40define i8* @test_simplify3() {
41; CHECK-LABEL: @test_simplify3(
42; CHECK-NEXT:    ret i8* getelementptr inbounds ([12 x i8], [12 x i8]* @hello, i32 0, i32 6)
43;
44  %str = getelementptr [12 x i8], [12 x i8]* @hello, i32 0, i32 0
45  %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
46
47  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
48  ret i8* %ret
49}
50
51; Check strpbrk(s, "a") -> strchr(s, 'a').
52
53define i8* @test_simplify4(i8* %str) {
54; CHECK-LABEL: @test_simplify4(
55; CHECK-NEXT:    [[STRCHR:%.*]] = call i8* @strchr(i8* nonnull dereferenceable(1) [[STR:%.*]], i32 119)
56; CHECK-NEXT:    ret i8* [[STRCHR]]
57;
58  %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
59
60  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
61  ret i8* %ret
62}
63
64; Check cases that shouldn't be simplified.
65
66define i8* @test_no_simplify1(i8* %str, i8* %pat) {
67; CHECK-LABEL: @test_no_simplify1(
68; CHECK-NEXT:    [[RET:%.*]] = call i8* @strpbrk(i8* [[STR:%.*]], i8* [[PAT:%.*]])
69; CHECK-NEXT:    ret i8* [[RET]]
70;
71
72  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
73  ret i8* %ret
74}
75