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 -instcombine -S | FileCheck %s 4 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" 6 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 i8* zeroinitializer 15 16 declare i8* @memchr(i8*, i32, i32) 17 18 define void @test1() { 19 ; CHECK-LABEL: @test1( 20 ; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 6), i8** @chp, align 4 21 ; CHECK-NEXT: ret void 22 ; 23 %str = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 24 %dst = call i8* @memchr(i8* %str, i32 119, i32 14) 25 store i8* %dst, i8** @chp 26 ret void 27 } 28 29 define void @test2() { 30 ; CHECK-LABEL: @test2( 31 ; CHECK-NEXT: store i8* null, i8** @chp, align 4 32 ; CHECK-NEXT: ret void 33 ; 34 %str = getelementptr [1 x i8], [1 x i8]* @null, i32 0, i32 0 35 %dst = call i8* @memchr(i8* %str, i32 119, i32 1) 36 store i8* %dst, i8** @chp 37 ret void 38 } 39 40 define void @test3() { 41 ; CHECK-LABEL: @test3( 42 ; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 13), i8** @chp, align 4 43 ; CHECK-NEXT: ret void 44 ; 45 %src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 46 %dst = call i8* @memchr(i8* %src, i32 0, i32 14) 47 store i8* %dst, i8** @chp 48 ret void 49 } 50 51 define void @test4(i32 %chr) { 52 ; CHECK-LABEL: @test4( 53 ; CHECK-NEXT: [[DST:%.*]] = call i8* @memchr(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 0), i32 %chr, i32 14) 54 ; CHECK-NEXT: store i8* [[DST]], i8** @chp, align 4 55 ; CHECK-NEXT: ret void 56 ; 57 %src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 58 %dst = call i8* @memchr(i8* %src, i32 %chr, i32 14) 59 store i8* %dst, i8** @chp 60 ret void 61 } 62 63 define void @test5() { 64 ; CHECK-LABEL: @test5( 65 ; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 13), i8** @chp, align 4 66 ; CHECK-NEXT: ret void 67 ; 68 %src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 69 %dst = call i8* @memchr(i8* %src, i32 65280, i32 14) 70 store i8* %dst, i8** @chp 71 ret void 72 } 73 74 define void @test6() { 75 ; CHECK-LABEL: @test6( 76 ; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hello, i32 0, i32 6), i8** @chp, align 4 77 ; CHECK-NEXT: ret void 78 ; 79 %src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 80 ; Overflow, but we still find the right thing. 81 %dst = call i8* @memchr(i8* %src, i32 119, i32 100) 82 store i8* %dst, i8** @chp 83 ret void 84 } 85 86 define void @test7() { 87 ; CHECK-LABEL: @test7( 88 ; CHECK-NEXT: store i8* null, i8** @chp, align 4 89 ; CHECK-NEXT: ret void 90 ; 91 %src = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 92 ; Overflow 93 %dst = call i8* @memchr(i8* %src, i32 120, i32 100) 94 store i8* %dst, i8** @chp 95 ret void 96 } 97 98 define void @test8() { 99 ; CHECK-LABEL: @test8( 100 ; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hellonull, i32 0, i32 6), i8** @chp, align 4 101 ; CHECK-NEXT: ret void 102 ; 103 %str = getelementptr [14 x i8], [14 x i8]* @hellonull, i32 0, i32 0 104 %dst = call i8* @memchr(i8* %str, i32 119, i32 14) 105 store i8* %dst, i8** @chp 106 ret void 107 } 108 109 define void @test9() { 110 ; CHECK-LABEL: @test9( 111 ; CHECK-NEXT: store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @hellonull, i32 0, i32 6), i8** @chp, align 4 112 ; CHECK-NEXT: ret void 113 ; 114 %str = getelementptr [14 x i8], [14 x i8]* @hellonull, i32 0, i32 2 115 %dst = call i8* @memchr(i8* %str, i32 119, i32 12) 116 store i8* %dst, i8** @chp 117 ret void 118 } 119 120 define void @test10() { 121 ; CHECK-LABEL: @test10( 122 ; CHECK-NEXT: store i8* null, i8** @chp, align 4 123 ; CHECK-NEXT: ret void 124 ; 125 %str = getelementptr [14 x i8], [14 x i8]* @hello, i32 0, i32 0 126 %dst = call i8* @memchr(i8* %str, i32 119, i32 6) 127 store i8* %dst, i8** @chp 128 ret void 129 } 130 131 ; Check transformation memchr("\r\n", C, 2) != nullptr -> (C & 9216) != 0 132 define i1 @test11(i32 %C) { 133 ; CHECK-LABEL: @test11( 134 ; CHECK-NEXT: [[TMP1:%.*]] = trunc i32 %C to i16 135 ; CHECK-NEXT: [[MEMCHR_BOUNDS:%.*]] = icmp ult i16 [[TMP1]], 16 136 ; CHECK-NEXT: [[TMP2:%.*]] = shl i16 1, [[TMP1]] 137 ; CHECK-NEXT: [[TMP3:%.*]] = and i16 [[TMP2]], 9216 138 ; CHECK-NEXT: [[MEMCHR_BITS:%.*]] = icmp ne i16 [[TMP3]], 0 139 ; CHECK-NEXT: [[MEMCHR:%.*]] = and i1 [[MEMCHR:%.*]].bounds, [[MEMCHR:%.*]].bits 140 ; CHECK-NEXT: ret i1 [[MEMCHR]] 141 ; 142 %dst = call i8* @memchr(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @newlines, i64 0, i64 0), i32 %C, i32 2) 143 %cmp = icmp ne i8* %dst, null 144 ret i1 %cmp 145 } 146 147 ; No 64 bits here 148 define i1 @test12(i32 %C) { 149 ; CHECK-LABEL: @test12( 150 ; CHECK-NEXT: [[DST:%.*]] = call i8* @memchr(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @spaces, i32 0, i32 0), i32 %C, i32 3) 151 ; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[DST]], null 152 ; CHECK-NEXT: ret i1 [[CMP]] 153 ; 154 %dst = call i8* @memchr(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @spaces, i64 0, i64 0), i32 %C, i32 3) 155 %cmp = icmp ne i8* %dst, null 156 ret i1 %cmp 157 } 158 159 define i1 @test13(i32 %C) { 160 ; CHECK-LABEL: @test13( 161 ; CHECK-NEXT: [[MEMCHR_BOUNDS:%.*]] = icmp ult i32 %C, 32 162 ; CHECK-NEXT: [[TMP1:%.*]] = shl i32 1, %C 163 ; CHECK-NEXT: [[TMP2:%.*]] = and i32 [[TMP1]], -2147483647 164 ; CHECK-NEXT: [[MEMCHR_BITS:%.*]] = icmp ne i32 [[TMP2]], 0 165 ; CHECK-NEXT: [[MEMCHR:%.*]] = and i1 [[MEMCHR:%.*]].bounds, [[MEMCHR:%.*]].bits 166 ; CHECK-NEXT: ret i1 [[MEMCHR]] 167 ; 168 %dst = call i8* @memchr(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @single, i64 0, i64 0), i32 %C, i32 2) 169 %cmp = icmp ne i8* %dst, null 170 ret i1 %cmp 171 } 172 173 define i1 @test14(i32 %C) { 174 ; CHECK-LABEL: @test14( 175 ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 %C, 31 176 ; CHECK-NEXT: ret i1 [[TMP1]] 177 ; 178 %dst = call i8* @memchr(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @single, i64 0, i64 0), i32 %C, i32 1) 179 %cmp = icmp ne i8* %dst, null 180 ret i1 %cmp 181 } 182 183 define i1 @test15(i32 %C) { 184 ; CHECK-LABEL: @test15( 185 ; CHECK-NEXT: [[DST:%.*]] = call i8* @memchr(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @negative, i32 0, i32 0), i32 %C, i32 3) 186 ; CHECK-NEXT: [[CMP:%.*]] = icmp ne i8* [[DST]], null 187 ; CHECK-NEXT: ret i1 [[CMP]] 188 ; 189 %dst = call i8* @memchr(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @negative, i64 0, i64 0), i32 %C, i32 3) 190 %cmp = icmp ne i8* %dst, null 191 ret i1 %cmp 192 } 193
