1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2 ; RUN: opt < %s -instsimplify -S | FileCheck %s 3 4 define i32 @add1(i32 %x) { 5 ; CHECK-LABEL: @add1( 6 ; CHECK-NEXT: ret i32 [[X:%.*]] 7 ; 8 ; (X + -1) + 1 -> X 9 %l = add i32 %x, -1 10 %r = add i32 %l, 1 11 ret i32 %r 12 } 13 14 define i32 @and1(i32 %x, i32 %y) { 15 ; CHECK-LABEL: @and1( 16 ; CHECK-NEXT: [[L:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] 17 ; CHECK-NEXT: ret i32 [[L]] 18 ; 19 ; (X & Y) & X -> X & Y 20 %l = and i32 %x, %y 21 %r = and i32 %l, %x 22 ret i32 %r 23 } 24 25 define i32 @and2(i32 %x, i32 %y) { 26 ; CHECK-LABEL: @and2( 27 ; CHECK-NEXT: [[R:%.*]] = and i32 [[X:%.*]], [[Y:%.*]] 28 ; CHECK-NEXT: ret i32 [[R]] 29 ; 30 ; X & (X & Y) -> X & Y 31 %r = and i32 %x, %y 32 %l = and i32 %x, %r 33 ret i32 %l 34 } 35 36 define i32 @or1(i32 %x, i32 %y) { 37 ; CHECK-LABEL: @or1( 38 ; CHECK-NEXT: [[L:%.*]] = or i32 [[X:%.*]], [[Y:%.*]] 39 ; CHECK-NEXT: ret i32 [[L]] 40 ; 41 ; (X | Y) | X -> X | Y 42 %l = or i32 %x, %y 43 %r = or i32 %l, %x 44 ret i32 %r 45 } 46 47 define i32 @or2(i32 %x, i32 %y) { 48 ; CHECK-LABEL: @or2( 49 ; CHECK-NEXT: [[R:%.*]] = or i32 [[X:%.*]], [[Y:%.*]] 50 ; CHECK-NEXT: ret i32 [[R]] 51 ; 52 ; X | (X | Y) -> X | Y 53 %r = or i32 %x, %y 54 %l = or i32 %x, %r 55 ret i32 %l 56 } 57 58 define i32 @xor1(i32 %x, i32 %y) { 59 ; CHECK-LABEL: @xor1( 60 ; CHECK-NEXT: ret i32 [[Y:%.*]] 61 ; 62 ; (X ^ Y) ^ X = Y 63 %l = xor i32 %x, %y 64 %r = xor i32 %l, %x 65 ret i32 %r 66 } 67 68 define i32 @xor2(i32 %x, i32 %y) { 69 ; CHECK-LABEL: @xor2( 70 ; CHECK-NEXT: ret i32 [[Y:%.*]] 71 ; 72 ; X ^ (X ^ Y) = Y 73 %r = xor i32 %x, %y 74 %l = xor i32 %x, %r 75 ret i32 %l 76 } 77 78 define i32 @sub1(i32 %x, i32 %y) { 79 ; CHECK-LABEL: @sub1( 80 ; CHECK-NEXT: ret i32 [[Y:%.*]] 81 ; 82 %d = sub i32 %x, %y 83 %r = sub i32 %x, %d 84 ret i32 %r 85 } 86 87 define i32 @sub2(i32 %x) { 88 ; CHECK-LABEL: @sub2( 89 ; CHECK-NEXT: ret i32 -1 90 ; 91 ; X - (X + 1) -> -1 92 %xp1 = add i32 %x, 1 93 %r = sub i32 %x, %xp1 94 ret i32 %r 95 } 96 97 define i32 @sub3(i32 %x, i32 %y) { 98 ; CHECK-LABEL: @sub3( 99 ; CHECK-NEXT: ret i32 [[X:%.*]] 100 ; 101 ; ((X + 1) + Y) - (Y + 1) -> X 102 %xp1 = add i32 %x, 1 103 %lhs = add i32 %xp1, %y 104 %rhs = add i32 %y, 1 105 %r = sub i32 %lhs, %rhs 106 ret i32 %r 107 } 108 109 ; (no overflow X * Y) / Y -> X 110 111 define i32 @mulnsw_sdiv(i32 %x, i32 %y) { 112 ; CHECK-LABEL: @mulnsw_sdiv( 113 ; CHECK-NEXT: ret i32 [[X:%.*]] 114 ; 115 %mul = mul nsw i32 %x, %y 116 %r = sdiv i32 %mul, %y 117 ret i32 %r 118 } 119 120 define <2 x i32> @mulnsw_sdiv_commute(<2 x i32> %x, <2 x i32> %y) { 121 ; CHECK-LABEL: @mulnsw_sdiv_commute( 122 ; CHECK-NEXT: ret <2 x i32> [[X:%.*]] 123 ; 124 %mul = mul nsw <2 x i32> %y, %x 125 %r = sdiv <2 x i32> %mul, %y 126 ret <2 x i32> %r 127 } 128 129 ; (no overflow X * Y) / Y -> X 130 131 define <2 x i8> @mulnuw_udiv(<2 x i8> %x, <2 x i8> %y) { 132 ; CHECK-LABEL: @mulnuw_udiv( 133 ; CHECK-NEXT: ret <2 x i8> [[X:%.*]] 134 ; 135 %mul = mul nuw <2 x i8> %x, %y 136 %r = udiv <2 x i8> %mul, %y 137 ret <2 x i8> %r 138 } 139 140 define i32 @mulnuw_udiv_commute(i32 %x, i32 %y) { 141 ; CHECK-LABEL: @mulnuw_udiv_commute( 142 ; CHECK-NEXT: ret i32 [[X:%.*]] 143 ; 144 %mul = mul nuw i32 %y, %x 145 %r = udiv i32 %mul, %y 146 ret i32 %r 147 } 148 149 ; (((X / Y) * Y) / Y) -> X / Y 150 151 define i32 @sdiv_mul_sdiv(i32 %x, i32 %y) { 152 ; CHECK-LABEL: @sdiv_mul_sdiv( 153 ; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]] 154 ; CHECK-NEXT: ret i32 [[DIV]] 155 ; 156 %div = sdiv i32 %x, %y 157 %mul = mul i32 %div, %y 158 %r = sdiv i32 %mul, %y 159 ret i32 %r 160 } 161 162 define i32 @sdiv_mul_sdiv_commute(i32 %x, i32 %y) { 163 ; CHECK-LABEL: @sdiv_mul_sdiv_commute( 164 ; CHECK-NEXT: [[DIV:%.*]] = sdiv i32 [[X:%.*]], [[Y:%.*]] 165 ; CHECK-NEXT: ret i32 [[DIV]] 166 ; 167 %div = sdiv i32 %x, %y 168 %mul = mul i32 %y, %div 169 %r = sdiv i32 %mul, %y 170 ret i32 %r 171 } 172 173 ; (((X / Y) * Y) / Y) -> X / Y 174 175 define i32 @udiv_mul_udiv(i32 %x, i32 %y) { 176 ; CHECK-LABEL: @udiv_mul_udiv( 177 ; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]] 178 ; CHECK-NEXT: ret i32 [[DIV]] 179 ; 180 %div = udiv i32 %x, %y 181 %mul = mul i32 %div, %y 182 %r = udiv i32 %mul, %y 183 ret i32 %r 184 } 185 186 define i32 @udiv_mul_udiv_commute(i32 %x, i32 %y) { 187 ; CHECK-LABEL: @udiv_mul_udiv_commute( 188 ; CHECK-NEXT: [[DIV:%.*]] = udiv i32 [[X:%.*]], [[Y:%.*]] 189 ; CHECK-NEXT: ret i32 [[DIV]] 190 ; 191 %div = udiv i32 %x, %y 192 %mul = mul i32 %y, %div 193 %r = udiv i32 %mul, %y 194 ret i32 %r 195 } 196 197 define i32 @sdiv3(i32 %x, i32 %y) { 198 ; CHECK-LABEL: @sdiv3( 199 ; CHECK-NEXT: ret i32 0 200 ; 201 ; (X rem Y) / Y -> 0 202 %rem = srem i32 %x, %y 203 %div = sdiv i32 %rem, %y 204 ret i32 %div 205 } 206 207 define i32 @sdiv4(i32 %x, i32 %y) { 208 ; CHECK-LABEL: @sdiv4( 209 ; CHECK-NEXT: ret i32 [[X:%.*]] 210 ; 211 ; (X / Y) * Y -> X if the division is exact 212 %div = sdiv exact i32 %x, %y 213 %mul = mul i32 %div, %y 214 ret i32 %mul 215 } 216 217 define i32 @sdiv5(i32 %x, i32 %y) { 218 ; CHECK-LABEL: @sdiv5( 219 ; CHECK-NEXT: ret i32 [[X:%.*]] 220 ; 221 ; Y * (X / Y) -> X if the division is exact 222 %div = sdiv exact i32 %x, %y 223 %mul = mul i32 %y, %div 224 ret i32 %mul 225 } 226 227 define i32 @udiv3(i32 %x, i32 %y) { 228 ; CHECK-LABEL: @udiv3( 229 ; CHECK-NEXT: ret i32 0 230 ; 231 ; (X rem Y) / Y -> 0 232 %rem = urem i32 %x, %y 233 %div = udiv i32 %rem, %y 234 ret i32 %div 235 } 236 237 define i32 @udiv4(i32 %x, i32 %y) { 238 ; CHECK-LABEL: @udiv4( 239 ; CHECK-NEXT: ret i32 [[X:%.*]] 240 ; 241 ; (X / Y) * Y -> X if the division is exact 242 %div = udiv exact i32 %x, %y 243 %mul = mul i32 %div, %y 244 ret i32 %mul 245 } 246 247 define i32 @udiv5(i32 %x, i32 %y) { 248 ; CHECK-LABEL: @udiv5( 249 ; CHECK-NEXT: ret i32 [[X:%.*]] 250 ; 251 ; Y * (X / Y) -> X if the division is exact 252 %div = udiv exact i32 %x, %y 253 %mul = mul i32 %y, %div 254 ret i32 %mul 255 } 256 257 define i16 @trunc1(i32 %x) { 258 ; CHECK-LABEL: @trunc1( 259 ; CHECK-NEXT: ret i16 1 260 ; 261 %y = add i32 %x, 1 262 %tx = trunc i32 %x to i16 263 %ty = trunc i32 %y to i16 264 %d = sub i16 %ty, %tx 265 ret i16 %d 266 } 267
