1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 3 define i1 @test1(i16 %tmp2) { 4 ; CHECK-LABEL: @test1 5 ; CHECK-NEXT: %tmp = icmp eq i16 %tmp2, 256 6 ; CHECK-NEXT: ret i1 %tmp 7 %tmp10 = call i16 @llvm.bswap.i16( i16 %tmp2 ) 8 %tmp = icmp eq i16 %tmp10, 1 9 ret i1 %tmp 10 } 11 12 define i1 @test2(i32 %tmp) { 13 ; CHECK-LABEL: @test2 14 ; CHECK-NEXT: %tmp.upgrd.1 = icmp eq i32 %tmp, 16777216 15 ; CHECK-NEXT: ret i1 %tmp.upgrd.1 16 %tmp34 = tail call i32 @llvm.bswap.i32( i32 %tmp ) 17 %tmp.upgrd.1 = icmp eq i32 %tmp34, 1 18 ret i1 %tmp.upgrd.1 19 } 20 21 define i1 @test3(i64 %tmp) { 22 ; CHECK-LABEL: @test3 23 ; CHECK-NEXT: %tmp.upgrd.2 = icmp eq i64 %tmp, 72057594037927936 24 ; CHECK-NEXT: ret i1 %tmp.upgrd.2 25 %tmp34 = tail call i64 @llvm.bswap.i64( i64 %tmp ) 26 %tmp.upgrd.2 = icmp eq i64 %tmp34, 1 27 ret i1 %tmp.upgrd.2 28 } 29 30 ; rdar://5992453 31 ; A & 255 32 define i32 @test4(i32 %a) nounwind { 33 ; CHECK-LABEL: @test4 34 ; CHECK-NEXT: %tmp2 = and i32 %a, 255 35 ; CHECK-NEXT: ret i32 %tmp2 36 %tmp2 = tail call i32 @llvm.bswap.i32( i32 %a ) 37 %tmp4 = lshr i32 %tmp2, 24 38 ret i32 %tmp4 39 } 40 41 ; A 42 define i32 @test5(i32 %a) nounwind { 43 ; CHECK-LABEL: @test5 44 ; CHECK-NEXT: ret i32 %a 45 %tmp2 = tail call i32 @llvm.bswap.i32( i32 %a ) 46 %tmp4 = tail call i32 @llvm.bswap.i32( i32 %tmp2 ) 47 ret i32 %tmp4 48 } 49 50 ; a >> 24 51 define i32 @test6(i32 %a) nounwind { 52 ; CHECK-LABEL: @test6 53 ; CHECK-NEXT: %tmp2 = lshr i32 %a, 24 54 ; CHECK-NEXT: ret i32 %tmp2 55 %tmp2 = tail call i32 @llvm.bswap.i32( i32 %a ) 56 %tmp4 = and i32 %tmp2, 255 57 ret i32 %tmp4 58 } 59 60 ; PR5284 61 define i16 @test7(i32 %A) { 62 ; CHECK-LABEL: @test7 63 ; CHECK-NEXT: %1 = lshr i32 %A, 16 64 ; CHECK-NEXT: %D = trunc i32 %1 to i16 65 ; CHECK-NEXT: ret i16 %D 66 %B = tail call i32 @llvm.bswap.i32(i32 %A) nounwind 67 %C = trunc i32 %B to i16 68 %D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind 69 ret i16 %D 70 } 71 72 define i16 @test8(i64 %A) { 73 ; CHECK-LABEL: @test8 74 ; CHECK-NEXT: %1 = lshr i64 %A, 48 75 ; CHECK-NEXT: %D = trunc i64 %1 to i16 76 ; CHECK-NEXT: ret i16 %D 77 %B = tail call i64 @llvm.bswap.i64(i64 %A) nounwind 78 %C = trunc i64 %B to i16 79 %D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind 80 ret i16 %D 81 } 82 83 ; Misc: Fold bswap(undef) to undef. 84 define i64 @foo() { 85 ; CHECK-LABEL: @foo 86 ; CHECK-NEXT: ret i64 undef 87 %a = call i64 @llvm.bswap.i64(i64 undef) 88 ret i64 %a 89 } 90 91 ; PR15782 92 ; Fold: OP( BSWAP(x), BSWAP(y) ) -> BSWAP( OP(x, y) ) 93 ; Fold: OP( BSWAP(x), CONSTANT ) -> BSWAP( OP(x, BSWAP(CONSTANT) ) ) 94 define i16 @bs_and16i(i16 %a, i16 %b) #0 { 95 ; CHECK-LABEL: @bs_and16i 96 ; CHECK-NEXT: %1 = and i16 %a, 4391 97 ; CHECK-NEXT: %2 = call i16 @llvm.bswap.i16(i16 %1) 98 ; CHECK-NEXT: ret i16 %2 99 %1 = tail call i16 @llvm.bswap.i16(i16 %a) 100 %2 = and i16 %1, 10001 101 ret i16 %2 102 } 103 104 define i16 @bs_and16(i16 %a, i16 %b) #0 { 105 ; CHECK-LABEL: @bs_and16 106 ; CHECK-NEXT: %1 = and i16 %a, %b 107 ; CHECK-NEXT: %2 = call i16 @llvm.bswap.i16(i16 %1) 108 ; CHECK-NEXT: ret i16 %2 109 %tmp1 = tail call i16 @llvm.bswap.i16(i16 %a) 110 %tmp2 = tail call i16 @llvm.bswap.i16(i16 %b) 111 %tmp3 = and i16 %tmp1, %tmp2 112 ret i16 %tmp3 113 } 114 115 define i16 @bs_or16(i16 %a, i16 %b) #0 { 116 ; CHECK-LABEL: @bs_or16 117 ; CHECK-NEXT: %1 = or i16 %a, %b 118 ; CHECK-NEXT: %2 = call i16 @llvm.bswap.i16(i16 %1) 119 ; CHECK-NEXT: ret i16 %2 120 %tmp1 = tail call i16 @llvm.bswap.i16(i16 %a) 121 %tmp2 = tail call i16 @llvm.bswap.i16(i16 %b) 122 %tmp3 = or i16 %tmp1, %tmp2 123 ret i16 %tmp3 124 } 125 126 define i16 @bs_xor16(i16 %a, i16 %b) #0 { 127 ; CHECK-LABEL: @bs_xor16 128 ; CHECK-NEXT: %1 = xor i16 %a, %b 129 ; CHECK-NEXT: %2 = call i16 @llvm.bswap.i16(i16 %1) 130 ; CHECK-NEXT: ret i16 %2 131 %tmp1 = tail call i16 @llvm.bswap.i16(i16 %a) 132 %tmp2 = tail call i16 @llvm.bswap.i16(i16 %b) 133 %tmp3 = xor i16 %tmp1, %tmp2 134 ret i16 %tmp3 135 } 136 137 define i32 @bs_and32i(i32 %a, i32 %b) #0 { 138 ; CHECK-LABEL: @bs_and32i 139 ; CHECK-NEXT: %1 = and i32 %a, -1585053440 140 ; CHECK-NEXT: %2 = call i32 @llvm.bswap.i32(i32 %1) 141 ; CHECK-NEXT: ret i32 %2 142 %tmp1 = tail call i32 @llvm.bswap.i32(i32 %a) 143 %tmp2 = and i32 %tmp1, 100001 144 ret i32 %tmp2 145 } 146 147 define i32 @bs_and32(i32 %a, i32 %b) #0 { 148 ; CHECK-LABEL: @bs_and32 149 ; CHECK-NEXT: %1 = and i32 %a, %b 150 ; CHECK-NEXT: %2 = call i32 @llvm.bswap.i32(i32 %1) 151 ; CHECK-NEXT: ret i32 %2 152 %tmp1 = tail call i32 @llvm.bswap.i32(i32 %a) 153 %tmp2 = tail call i32 @llvm.bswap.i32(i32 %b) 154 %tmp3 = and i32 %tmp1, %tmp2 155 ret i32 %tmp3 156 } 157 158 define i32 @bs_or32(i32 %a, i32 %b) #0 { 159 ; CHECK-LABEL: @bs_or32 160 ; CHECK-NEXT: %1 = or i32 %a, %b 161 ; CHECK-NEXT: %2 = call i32 @llvm.bswap.i32(i32 %1) 162 ; CHECK-NEXT: ret i32 %2 163 %tmp1 = tail call i32 @llvm.bswap.i32(i32 %a) 164 %tmp2 = tail call i32 @llvm.bswap.i32(i32 %b) 165 %tmp3 = or i32 %tmp1, %tmp2 166 ret i32 %tmp3 167 } 168 169 define i32 @bs_xor32(i32 %a, i32 %b) #0 { 170 ; CHECK-LABEL: @bs_xor32 171 ; CHECK-NEXT: %1 = xor i32 %a, %b 172 ; CHECK-NEXT: %2 = call i32 @llvm.bswap.i32(i32 %1) 173 ; CHECK-NEXT: ret i32 %2 174 %tmp1 = tail call i32 @llvm.bswap.i32(i32 %a) 175 %tmp2 = tail call i32 @llvm.bswap.i32(i32 %b) 176 %tmp3 = xor i32 %tmp1, %tmp2 177 ret i32 %tmp3 178 } 179 180 define i64 @bs_and64i(i64 %a, i64 %b) #0 { 181 ; CHECK-LABEL: @bs_and64i 182 ; CHECK-NEXT: %1 = and i64 %a, 129085117527228416 183 ; CHECK-NEXT: %2 = call i64 @llvm.bswap.i64(i64 %1) 184 ; CHECK-NEXT: ret i64 %2 185 %tmp1 = tail call i64 @llvm.bswap.i64(i64 %a) 186 %tmp2 = and i64 %tmp1, 1000000001 187 ret i64 %tmp2 188 } 189 190 define i64 @bs_and64(i64 %a, i64 %b) #0 { 191 ; CHECK-LABEL: @bs_and64 192 ; CHECK-NEXT: %1 = and i64 %a, %b 193 ; CHECK-NEXT: %2 = call i64 @llvm.bswap.i64(i64 %1) 194 ; CHECK-NEXT: ret i64 %2 195 %tmp1 = tail call i64 @llvm.bswap.i64(i64 %a) 196 %tmp2 = tail call i64 @llvm.bswap.i64(i64 %b) 197 %tmp3 = and i64 %tmp1, %tmp2 198 ret i64 %tmp3 199 } 200 201 define i64 @bs_or64(i64 %a, i64 %b) #0 { 202 ; CHECK-LABEL: @bs_or64 203 ; CHECK-NEXT: %1 = or i64 %a, %b 204 ; CHECK-NEXT: %2 = call i64 @llvm.bswap.i64(i64 %1) 205 ; CHECK-NEXT: ret i64 %2 206 %tmp1 = tail call i64 @llvm.bswap.i64(i64 %a) 207 %tmp2 = tail call i64 @llvm.bswap.i64(i64 %b) 208 %tmp3 = or i64 %tmp1, %tmp2 209 ret i64 %tmp3 210 } 211 212 define i64 @bs_xor64(i64 %a, i64 %b) #0 { 213 ; CHECK-LABEL: @bs_xor64 214 ; CHECK-NEXT: %1 = xor i64 %a, %b 215 ; CHECK-NEXT: %2 = call i64 @llvm.bswap.i64(i64 %1) 216 ; CHECK-NEXT: ret i64 %2 217 %tmp1 = tail call i64 @llvm.bswap.i64(i64 %a) 218 %tmp2 = tail call i64 @llvm.bswap.i64(i64 %b) 219 %tmp3 = xor i64 %tmp1, %tmp2 220 ret i64 %tmp3 221 } 222 223 declare i16 @llvm.bswap.i16(i16) 224 declare i32 @llvm.bswap.i32(i32) 225 declare i64 @llvm.bswap.i64(i64) 226
