1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Test that the memchr library call simplifier works correctly.
3 ; RUN: opt < %s -passes=instcombine -S | FileCheck %s
5 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-n8:16:32"
7 @hello = constant [14 x i8] c"hello world\5Cn\00"
8 @hellonull = constant [14 x i8] c"hello\00world\5Cn\00"
9 @null = constant [1 x i8] zeroinitializer
10 @newlines = constant [3 x i8] c"\0D\0A\00"
11 @single = constant [2 x i8] c"\1F\00"
12 @spaces = constant [4 x i8] c" \0D\0A\00"
13 @negative = constant [3 x i8] c"\FF\FE\00"
14 @chp = global ptr zeroinitializer
16 declare ptr @memchr(ptr, i32, i32)
18 define void @test1() {
19 ; CHECK-LABEL: @test1(
20 ; CHECK-NEXT: store ptr getelementptr inbounds (i8, ptr @hello, i32 6), ptr @chp, align 4
21 ; CHECK-NEXT: ret void
23 %dst = call ptr @memchr(ptr @hello, i32 119, i32 14)
24 store ptr %dst, ptr @chp
28 define void @test2() {
29 ; CHECK-LABEL: @test2(
30 ; CHECK-NEXT: store ptr null, ptr @chp, align 4
31 ; CHECK-NEXT: ret void
33 %dst = call ptr @memchr(ptr @null, i32 119, i32 1)
34 store ptr %dst, ptr @chp
38 define void @test3() {
39 ; CHECK-LABEL: @test3(
40 ; CHECK-NEXT: store ptr getelementptr inbounds (i8, ptr @hello, i32 13), ptr @chp, align 4
41 ; CHECK-NEXT: ret void
43 %dst = call ptr @memchr(ptr @hello, i32 0, i32 14)
44 store ptr %dst, ptr @chp
48 define void @test4(i32 %chr) {
49 ; CHECK-LABEL: @test4(
50 ; CHECK-NEXT: [[DST:%.*]] = call ptr @memchr(ptr noundef nonnull dereferenceable(1) @hello, i32 [[CHR:%.*]], i32 14)
51 ; CHECK-NEXT: store ptr [[DST]], ptr @chp, align 4
52 ; CHECK-NEXT: ret void
54 %dst = call ptr @memchr(ptr @hello, i32 %chr, i32 14)
55 store ptr %dst, ptr @chp
59 define void @test5() {
60 ; CHECK-LABEL: @test5(
61 ; CHECK-NEXT: store ptr getelementptr inbounds (i8, ptr @hello, i32 13), ptr @chp, align 4
62 ; CHECK-NEXT: ret void
64 %dst = call ptr @memchr(ptr @hello, i32 65280, i32 14)
65 store ptr %dst, ptr @chp
69 define void @test6() {
70 ; CHECK-LABEL: @test6(
71 ; CHECK-NEXT: store ptr getelementptr inbounds (i8, ptr @hello, i32 6), ptr @chp, align 4
72 ; CHECK-NEXT: ret void
74 ; Overflow, but we still find the right thing.
75 %dst = call ptr @memchr(ptr @hello, i32 119, i32 100)
76 store ptr %dst, ptr @chp
80 define void @test7() {
81 ; CHECK-LABEL: @test7(
82 ; CHECK-NEXT: store ptr null, ptr @chp, align 4
83 ; CHECK-NEXT: ret void
86 %dst = call ptr @memchr(ptr @hello, i32 120, i32 100)
87 store ptr %dst, ptr @chp
91 define void @test8() {
92 ; CHECK-LABEL: @test8(
93 ; CHECK-NEXT: store ptr getelementptr inbounds (i8, ptr @hellonull, i32 6), ptr @chp, align 4
94 ; CHECK-NEXT: ret void
96 %dst = call ptr @memchr(ptr @hellonull, i32 119, i32 14)
97 store ptr %dst, ptr @chp
101 define void @test9() {
102 ; CHECK-LABEL: @test9(
103 ; CHECK-NEXT: store ptr getelementptr inbounds (i8, ptr @hellonull, i32 6), ptr @chp, align 4
104 ; CHECK-NEXT: ret void
106 %str = getelementptr [14 x i8], ptr @hellonull, i32 0, i32 2
107 %dst = call ptr @memchr(ptr %str, i32 119, i32 12)
108 store ptr %dst, ptr @chp
112 define void @test10() {
113 ; CHECK-LABEL: @test10(
114 ; CHECK-NEXT: store ptr null, ptr @chp, align 4
115 ; CHECK-NEXT: ret void
117 %dst = call ptr @memchr(ptr @hello, i32 119, i32 6)
118 store ptr %dst, ptr @chp
122 ; Check transformation memchr("\r\n", C, 3) != nullptr -> (C & 9217) != 0
123 define i1 @test11(i32 %C) {
124 ; CHECK-LABEL: @test11(
125 ; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[C:%.*]] to i16
126 ; CHECK-NEXT: [[TMP2:%.*]] = and i16 [[TMP1]], 255
127 ; CHECK-NEXT: [[MEMCHR_BOUNDS:%.*]] = icmp samesign ult i16 [[TMP2]], 16
128 ; CHECK-NEXT: [[TMP3:%.*]] = shl nuw i16 1, [[TMP2]]
129 ; CHECK-NEXT: [[TMP4:%.*]] = and i16 [[TMP3]], 9217
130 ; CHECK-NEXT: [[MEMCHR_BITS:%.*]] = icmp ne i16 [[TMP4]], 0
131 ; CHECK-NEXT: [[MEMCHR:%.*]] = select i1 [[MEMCHR_BOUNDS]], i1 [[MEMCHR_BITS]], i1 false
132 ; CHECK-NEXT: ret i1 [[MEMCHR]]
134 %dst = call ptr @memchr(ptr @newlines, i32 %C, i32 3)
135 %cmp = icmp ne ptr %dst, null
140 define i1 @test12(i32 %C) {
141 ; CHECK-LABEL: @test12(
142 ; CHECK-NEXT: [[DST:%.*]] = call ptr @memchr(ptr noundef nonnull dereferenceable(1) @spaces, i32 [[C:%.*]], i32 3)
143 ; CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[DST]], null
144 ; CHECK-NEXT: ret i1 [[CMP]]
146 %dst = call ptr @memchr(ptr @spaces, i32 %C, i32 3)
147 %cmp = icmp ne ptr %dst, null
151 define i1 @test13(i32 %C) {
152 ; CHECK-LABEL: @test13(
153 ; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 [[C:%.*]] to i8
154 ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i8 [[TMP1]], 0
155 ; CHECK-NEXT: [[TMP3:%.*]] = icmp eq i8 [[TMP1]], 31
156 ; CHECK-NEXT: [[CMP:%.*]] = or i1 [[TMP3]], [[TMP2]]
157 ; CHECK-NEXT: ret i1 [[CMP]]
159 %dst = call ptr @memchr(ptr @single, i32 %C, i32 2)
160 %cmp = icmp ne ptr %dst, null
164 define i1 @test14(i32 %C) {
165 ; CHECK-LABEL: @test14(
166 ; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[C:%.*]], 255
167 ; CHECK-NEXT: [[MEMCHR_CHAR0CMP:%.*]] = icmp eq i32 [[TMP1]], 31
168 ; CHECK-NEXT: ret i1 [[MEMCHR_CHAR0CMP]]
170 %dst = call ptr @memchr(ptr @single, i32 %C, i32 1)
171 %cmp = icmp ne ptr %dst, null
175 define i1 @test15(i32 %C, i32 %n) {
176 ; CHECK-LABEL: @test15(
177 ; CHECK-NEXT: [[DST:%.*]] = call ptr @memchr(ptr nonnull @negative, i32 [[C:%.*]], i32 [[N:%.*]])
178 ; CHECK-NEXT: [[CMP:%.*]] = icmp ne ptr [[DST]], null
179 ; CHECK-NEXT: ret i1 [[CMP]]
181 %dst = call ptr @memchr(ptr @negative, i32 %C, i32 %n)
182 %cmp = icmp ne ptr %dst, null
186 @s = internal constant [1 x i8] [i8 0], align 1
187 define ptr @pr32124() {
188 ; CHECK-LABEL: @pr32124(
189 ; CHECK-NEXT: ret ptr @s
191 %res = tail call ptr @memchr(ptr @s, i32 0, i32 1)
195 define ptr @test16(ptr %str, i32 %c, i32 %n) {
196 ; CHECK-LABEL: @test16(
197 ; CHECK-NEXT: [[RET:%.*]] = call ptr @memchr(ptr [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
198 ; CHECK-NEXT: ret ptr [[RET]]
201 %ret = call ptr @memchr(ptr %str, i32 %c, i32 %n)
205 define ptr @test17(ptr %str, i32 %c, i32 %n) {
206 ; CHECK-LABEL: @test17(
207 ; CHECK-NEXT: [[RET:%.*]] = call ptr @memchr(ptr nonnull [[STR:%.*]], i32 [[C:%.*]], i32 [[N:%.*]])
208 ; CHECK-NEXT: ret ptr [[RET]]
211 %ret = call ptr @memchr(ptr nonnull %str, i32 %c, i32 %n)
215 define ptr @test18(ptr %str, i32 %c) {
216 ; CHECK-LABEL: @test18(
217 ; CHECK-NEXT: [[RET:%.*]] = call ptr @memchr(ptr noundef nonnull dereferenceable(1) [[STR:%.*]], i32 [[C:%.*]], i32 5)
218 ; CHECK-NEXT: ret ptr [[RET]]
221 %ret = call ptr @memchr(ptr %str, i32 %c, i32 5)
225 define ptr @test19(ptr %str, i32 %c) null_pointer_is_valid {
226 ; CHECK-LABEL: @test19(
227 ; CHECK-NEXT: [[RET:%.*]] = call ptr @memchr(ptr noundef [[STR:%.*]], i32 [[C:%.*]], i32 5)
228 ; CHECK-NEXT: ret ptr [[RET]]
231 %ret = call ptr @memchr(ptr %str, i32 %c, i32 5)