1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc -mtriple=aarch64-unknown-linux-gnu < %s | FileCheck %s 3 4 ; https://bugs.llvm.org/show_bug.cgi?id=37104 5 6 ; X: [bit2] [bit0] 7 ; Y: [bit3] [bit1] 8 9 define i8 @out8_constmask(i8 %x, i8 %y) { 10 ; CHECK-LABEL: out8_constmask: 11 ; CHECK: // %bb.0: 12 ; CHECK-NEXT: mov w8, #85 13 ; CHECK-NEXT: mov w9, #-86 14 ; CHECK-NEXT: and w8, w0, w8 15 ; CHECK-NEXT: and w9, w1, w9 16 ; CHECK-NEXT: orr w0, w8, w9 17 ; CHECK-NEXT: ret 18 %mx = and i8 %x, 85 19 %my = and i8 %y, -86 20 %r = or i8 %mx, %my 21 ret i8 %r 22 } 23 24 define i16 @out16_constmask(i16 %x, i16 %y) { 25 ; CHECK-LABEL: out16_constmask: 26 ; CHECK: // %bb.0: 27 ; CHECK-NEXT: mov w8, #21845 28 ; CHECK-NEXT: mov w9, #-21846 29 ; CHECK-NEXT: and w8, w0, w8 30 ; CHECK-NEXT: and w9, w1, w9 31 ; CHECK-NEXT: orr w0, w8, w9 32 ; CHECK-NEXT: ret 33 %mx = and i16 %x, 21845 34 %my = and i16 %y, -21846 35 %r = or i16 %mx, %my 36 ret i16 %r 37 } 38 39 define i32 @out32_constmask(i32 %x, i32 %y) { 40 ; CHECK-LABEL: out32_constmask: 41 ; CHECK: // %bb.0: 42 ; CHECK-NEXT: and w8, w0, #0x55555555 43 ; CHECK-NEXT: and w9, w1, #0xaaaaaaaa 44 ; CHECK-NEXT: orr w0, w8, w9 45 ; CHECK-NEXT: ret 46 %mx = and i32 %x, 1431655765 47 %my = and i32 %y, -1431655766 48 %r = or i32 %mx, %my 49 ret i32 %r 50 } 51 52 define i64 @out64_constmask(i64 %x, i64 %y) { 53 ; CHECK-LABEL: out64_constmask: 54 ; CHECK: // %bb.0: 55 ; CHECK-NEXT: and x8, x0, #0x5555555555555555 56 ; CHECK-NEXT: and x9, x1, #0xaaaaaaaaaaaaaaaa 57 ; CHECK-NEXT: orr x0, x8, x9 58 ; CHECK-NEXT: ret 59 %mx = and i64 %x, 6148914691236517205 60 %my = and i64 %y, -6148914691236517206 61 %r = or i64 %mx, %my 62 ret i64 %r 63 } 64 65 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 66 ; Should be the same as the previous one. 67 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; 68 69 define i8 @in8_constmask(i8 %x, i8 %y) { 70 ; CHECK-LABEL: in8_constmask: 71 ; CHECK: // %bb.0: 72 ; CHECK-NEXT: eor w8, w0, w1 73 ; CHECK-NEXT: mov w9, #85 74 ; CHECK-NEXT: and w8, w8, w9 75 ; CHECK-NEXT: eor w0, w8, w1 76 ; CHECK-NEXT: ret 77 %n0 = xor i8 %x, %y 78 %n1 = and i8 %n0, 85 79 %r = xor i8 %n1, %y 80 ret i8 %r 81 } 82 83 define i16 @in16_constmask(i16 %x, i16 %y) { 84 ; CHECK-LABEL: in16_constmask: 85 ; CHECK: // %bb.0: 86 ; CHECK-NEXT: eor w8, w0, w1 87 ; CHECK-NEXT: mov w9, #21845 88 ; CHECK-NEXT: and w8, w8, w9 89 ; CHECK-NEXT: eor w0, w8, w1 90 ; CHECK-NEXT: ret 91 %n0 = xor i16 %x, %y 92 %n1 = and i16 %n0, 21845 93 %r = xor i16 %n1, %y 94 ret i16 %r 95 } 96 97 define i32 @in32_constmask(i32 %x, i32 %y) { 98 ; CHECK-LABEL: in32_constmask: 99 ; CHECK: // %bb.0: 100 ; CHECK-NEXT: eor w8, w0, w1 101 ; CHECK-NEXT: and w8, w8, #0x55555555 102 ; CHECK-NEXT: eor w0, w8, w1 103 ; CHECK-NEXT: ret 104 %n0 = xor i32 %x, %y 105 %n1 = and i32 %n0, 1431655765 106 %r = xor i32 %n1, %y 107 ret i32 %r 108 } 109 110 define i64 @in64_constmask(i64 %x, i64 %y) { 111 ; CHECK-LABEL: in64_constmask: 112 ; CHECK: // %bb.0: 113 ; CHECK-NEXT: eor x8, x0, x1 114 ; CHECK-NEXT: and x8, x8, #0x5555555555555555 115 ; CHECK-NEXT: eor x0, x8, x1 116 ; CHECK-NEXT: ret 117 %n0 = xor i64 %x, %y 118 %n1 = and i64 %n0, 6148914691236517205 119 %r = xor i64 %n1, %y 120 ret i64 %r 121 } 122 123 ; ============================================================================ ; 124 ; Constant Commutativity tests. 125 ; ============================================================================ ; 126 127 define i32 @in_constmask_commutativity_0_1(i32 %x, i32 %y) { 128 ; CHECK-LABEL: in_constmask_commutativity_0_1: 129 ; CHECK: // %bb.0: 130 ; CHECK-NEXT: eor w8, w0, w1 131 ; CHECK-NEXT: and w8, w8, #0x55555555 132 ; CHECK-NEXT: eor w0, w1, w8 133 ; CHECK-NEXT: ret 134 %n0 = xor i32 %x, %y 135 %n1 = and i32 %n0, 1431655765 136 %r = xor i32 %y, %n1 ; swapped 137 ret i32 %r 138 } 139 140 define i32 @in_constmask_commutativity_1_0(i32 %x, i32 %y) { 141 ; CHECK-LABEL: in_constmask_commutativity_1_0: 142 ; CHECK: // %bb.0: 143 ; CHECK-NEXT: eor w8, w0, w1 144 ; CHECK-NEXT: and w8, w8, #0x55555555 145 ; CHECK-NEXT: eor w0, w8, w0 146 ; CHECK-NEXT: ret 147 %n0 = xor i32 %x, %y 148 %n1 = and i32 %n0, 1431655765 149 %r = xor i32 %n1, %x ; %x instead of %y 150 ret i32 %r 151 } 152 153 define i32 @in_constmask_commutativity_1_1(i32 %x, i32 %y) { 154 ; CHECK-LABEL: in_constmask_commutativity_1_1: 155 ; CHECK: // %bb.0: 156 ; CHECK-NEXT: eor w8, w0, w1 157 ; CHECK-NEXT: and w8, w8, #0x55555555 158 ; CHECK-NEXT: eor w0, w0, w8 159 ; CHECK-NEXT: ret 160 %n0 = xor i32 %x, %y 161 %n1 = and i32 %n0, 1431655765 162 %r = xor i32 %x, %n1 ; swapped, %x instead of %y 163 ret i32 %r 164 } 165 166 ; ============================================================================ ; 167 ; Y is an 'and' too. 168 ; ============================================================================ ; 169 170 define i32 @in_complex_y0_constmask(i32 %x, i32 %y_hi, i32 %y_low) { 171 ; CHECK-LABEL: in_complex_y0_constmask: 172 ; CHECK: // %bb.0: 173 ; CHECK-NEXT: and w8, w1, w2 174 ; CHECK-NEXT: eor w9, w0, w8 175 ; CHECK-NEXT: and w9, w9, #0x55555555 176 ; CHECK-NEXT: eor w0, w9, w8 177 ; CHECK-NEXT: ret 178 %y = and i32 %y_hi, %y_low 179 %n0 = xor i32 %x, %y 180 %n1 = and i32 %n0, 1431655765 181 %r = xor i32 %n1, %y 182 ret i32 %r 183 } 184 185 define i32 @in_complex_y1_constmask(i32 %x, i32 %y_hi, i32 %y_low) { 186 ; CHECK-LABEL: in_complex_y1_constmask: 187 ; CHECK: // %bb.0: 188 ; CHECK-NEXT: and w8, w1, w2 189 ; CHECK-NEXT: eor w9, w0, w8 190 ; CHECK-NEXT: and w9, w9, #0x55555555 191 ; CHECK-NEXT: eor w0, w8, w9 192 ; CHECK-NEXT: ret 193 %y = and i32 %y_hi, %y_low 194 %n0 = xor i32 %x, %y 195 %n1 = and i32 %n0, 1431655765 196 %r = xor i32 %y, %n1 197 ret i32 %r 198 } 199 200 ; ============================================================================ ; 201 ; Negative tests. Should not be folded. 202 ; ============================================================================ ; 203 204 ; Multi-use tests. 205 206 declare void @use32(i32) nounwind 207 208 define i32 @in_multiuse_A_constmask(i32 %x, i32 %y, i32 %z) nounwind { 209 ; CHECK-LABEL: in_multiuse_A_constmask: 210 ; CHECK: // %bb.0: 211 ; CHECK-NEXT: str x20, [sp, #-32]! // 8-byte Folded Spill 212 ; CHECK-NEXT: eor w8, w0, w1 213 ; CHECK-NEXT: and w20, w8, #0x55555555 214 ; CHECK-NEXT: mov w0, w20 215 ; CHECK-NEXT: stp x19, x30, [sp, #16] // 8-byte Folded Spill 216 ; CHECK-NEXT: mov w19, w1 217 ; CHECK-NEXT: bl use32 218 ; CHECK-NEXT: eor w0, w20, w19 219 ; CHECK-NEXT: ldp x19, x30, [sp, #16] // 8-byte Folded Reload 220 ; CHECK-NEXT: ldr x20, [sp], #32 // 8-byte Folded Reload 221 ; CHECK-NEXT: ret 222 %n0 = xor i32 %x, %y 223 %n1 = and i32 %n0, 1431655765 224 call void @use32(i32 %n1) 225 %r = xor i32 %n1, %y 226 ret i32 %r 227 } 228 229 define i32 @in_multiuse_B_constmask(i32 %x, i32 %y, i32 %z) nounwind { 230 ; CHECK-LABEL: in_multiuse_B_constmask: 231 ; CHECK: // %bb.0: 232 ; CHECK-NEXT: str x20, [sp, #-32]! // 8-byte Folded Spill 233 ; CHECK-NEXT: eor w0, w0, w1 234 ; CHECK-NEXT: stp x19, x30, [sp, #16] // 8-byte Folded Spill 235 ; CHECK-NEXT: mov w19, w1 236 ; CHECK-NEXT: and w20, w0, #0x55555555 237 ; CHECK-NEXT: bl use32 238 ; CHECK-NEXT: eor w0, w20, w19 239 ; CHECK-NEXT: ldp x19, x30, [sp, #16] // 8-byte Folded Reload 240 ; CHECK-NEXT: ldr x20, [sp], #32 // 8-byte Folded Reload 241 ; CHECK-NEXT: ret 242 %n0 = xor i32 %x, %y 243 %n1 = and i32 %n0, 1431655765 244 call void @use32(i32 %n0) 245 %r = xor i32 %n1, %y 246 ret i32 %r 247 } 248 249 ; Various bad variants 250 251 define i32 @n0_badconstmask(i32 %x, i32 %y) { 252 ; CHECK-LABEL: n0_badconstmask: 253 ; CHECK: // %bb.0: 254 ; CHECK-NEXT: mov w9, #43691 255 ; CHECK-NEXT: movk w9, #43690, lsl #16 256 ; CHECK-NEXT: and w8, w0, #0x55555555 257 ; CHECK-NEXT: and w9, w1, w9 258 ; CHECK-NEXT: orr w0, w8, w9 259 ; CHECK-NEXT: ret 260 %mx = and i32 %x, 1431655765 261 %my = and i32 %y, -1431655765 ; instead of -1431655766 262 %r = or i32 %mx, %my 263 ret i32 %r 264 } 265 266 define i32 @n1_thirdvar_constmask(i32 %x, i32 %y, i32 %z) { 267 ; CHECK-LABEL: n1_thirdvar_constmask: 268 ; CHECK: // %bb.0: 269 ; CHECK-NEXT: eor w8, w0, w1 270 ; CHECK-NEXT: and w8, w8, #0x55555555 271 ; CHECK-NEXT: eor w0, w8, w2 272 ; CHECK-NEXT: ret 273 %n0 = xor i32 %x, %y 274 %n1 = and i32 %n0, 1431655765 275 %r = xor i32 %n1, %z ; instead of %y 276 ret i32 %r 277 } 278
