1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test that the strpbrk library call simplifier works correctly.
4 ; RUN: opt < %s -instcombine -S | FileCheck %s
6 target 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"
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
12 declare i8* @strpbrk(i8*, i8*)
14 ; Check strpbrk(s, "") -> NULL.
16 define i8* @test_simplify1(i8* %str) {
17 ; CHECK-LABEL: @test_simplify1(
18 ; CHECK-NEXT: ret i8* null
20 %pat = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
22 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
26 ; Check strpbrk("", s) -> NULL.
28 define i8* @test_simplify2(i8* %pat) {
29 ; CHECK-LABEL: @test_simplify2(
30 ; CHECK-NEXT: ret i8* null
32 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0
34 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
38 ; Check strpbrk(s1, s2), where s1 and s2 are constants.
40 define 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)
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
47 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
51 ; Check strpbrk(s, "a") -> strchr(s, 'a').
53 define i8* @test_simplify4(i8* %str) {
54 ; CHECK-LABEL: @test_simplify4(
55 ; CHECK-NEXT: [[STRCHR:%.*]] = call i8* @strchr(i8* noundef nonnull dereferenceable(1) [[STR:%.*]], i32 119)
56 ; CHECK-NEXT: ret i8* [[STRCHR]]
58 %pat = getelementptr [2 x i8], [2 x i8]* @w, i32 0, i32 0
60 %ret = call i8* @strpbrk(i8* %str, i8* %pat)
64 ; Check cases that shouldn't be simplified.
66 define 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]]
72 %ret = call i8* @strpbrk(i8* %str, i8* %pat)