1; Test that the strpbrk library call simplifier works correctly.
2;
3; RUN: opt < %s -instcombine -S | FileCheck %s
4
5target 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"
6
7@hello = constant [12 x i8] c"hello world\00"
8@w = constant [2 x i8] c"w\00"
9@null = constant [1 x i8] zeroinitializer
10
11declare i8* @strpbrk(i8*, i8*)
12
13; Check strpbrk(s, "") -> NULL.
14
15define i8* @test_simplify1(i8* %str) {
16; CHECK-LABEL: @test_simplify1(
17  %pat = getelementptr [1 x i8]* @null, i32 0, i32 0
18
19  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
20  ret i8* %ret
21; CHECK-NEXT: ret i8* null
22}
23
24; Check strpbrk("", s) -> NULL.
25
26define i8* @test_simplify2(i8* %pat) {
27; CHECK-LABEL: @test_simplify2(
28  %str = getelementptr [1 x i8]* @null, i32 0, i32 0
29
30  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
31  ret i8* %ret
32; CHECK-NEXT: ret i8* null
33}
34
35; Check strpbrk(s1, s2), where s1 and s2 are constants.
36
37define i8* @test_simplify3() {
38; CHECK-LABEL: @test_simplify3(
39  %str = getelementptr [12 x i8]* @hello, i32 0, i32 0
40  %pat = getelementptr [2 x i8]* @w, i32 0, i32 0
41
42  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
43  ret i8* %ret
44; CHECK-NEXT: ret i8* getelementptr inbounds ([12 x i8]* @hello, i32 0, i32 6)
45}
46
47; Check strpbrk(s, "a") -> strchr(s, 'a').
48
49define i8* @test_simplify4(i8* %str) {
50; CHECK-LABEL: @test_simplify4(
51  %pat = getelementptr [2 x i8]* @w, i32 0, i32 0
52
53  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
54; CHECK-NEXT: [[VAR:%[a-z]+]] = call i8* @strchr(i8* %str, i32 119)
55  ret i8* %ret
56; CHECK-NEXT: ret i8* [[VAR]]
57}
58
59; Check cases that shouldn't be simplified.
60
61define i8* @test_no_simplify1(i8* %str, i8* %pat) {
62; CHECK-LABEL: @test_no_simplify1(
63
64  %ret = call i8* @strpbrk(i8* %str, i8* %pat)
65; CHECK-NEXT: %ret = call i8* @strpbrk(i8* %str, i8* %pat)
66  ret i8* %ret
67; CHECK-NEXT: ret i8* %ret
68}
69