1; NOTE: Assertions have been autogenerated by update_test_checks.py 2; RUN: opt < %s -instsimplify -S | FileCheck %s 3 4define i32 @add1(i32 %x) { 5; CHECK-LABEL: @add1( 6; CHECK: 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 14define i32 @and1(i32 %x, i32 %y) { 15; CHECK-LABEL: @and1( 16; CHECK: [[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 25define i32 @and2(i32 %x, i32 %y) { 26; CHECK-LABEL: @and2( 27; CHECK: [[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 36define i32 @or1(i32 %x, i32 %y) { 37; CHECK-LABEL: @or1( 38; CHECK: [[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 47define i32 @or2(i32 %x, i32 %y) { 48; CHECK-LABEL: @or2( 49; CHECK: [[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 58define i32 @xor1(i32 %x, i32 %y) { 59; CHECK-LABEL: @xor1( 60; CHECK: 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 68define i32 @xor2(i32 %x, i32 %y) { 69; CHECK-LABEL: @xor2( 70; CHECK: 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 78define i32 @sub1(i32 %x, i32 %y) { 79; CHECK-LABEL: @sub1( 80; CHECK: ret i32 %y 81; 82 %d = sub i32 %x, %y 83 %r = sub i32 %x, %d 84 ret i32 %r 85} 86 87define i32 @sub2(i32 %x) { 88; CHECK-LABEL: @sub2( 89; CHECK: 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 97define i32 @sub3(i32 %x, i32 %y) { 98; CHECK-LABEL: @sub3( 99; CHECK: 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 109define i32 @sdiv1(i32 %x, i32 %y) { 110; CHECK-LABEL: @sdiv1( 111; CHECK: ret i32 %x 112; 113; (no overflow X * Y) / Y -> X 114 %mul = mul nsw i32 %x, %y 115 %r = sdiv i32 %mul, %y 116 ret i32 %r 117} 118 119define i32 @sdiv2(i32 %x, i32 %y) { 120; CHECK-LABEL: @sdiv2( 121; CHECK: [[DIV:%.*]] = sdiv i32 %x, %y 122; CHECK-NEXT: ret i32 [[DIV]] 123; 124; (((X / Y) * Y) / Y) -> X / Y 125 %div = sdiv i32 %x, %y 126 %mul = mul i32 %div, %y 127 %r = sdiv i32 %mul, %y 128 ret i32 %r 129} 130 131define i32 @sdiv3(i32 %x, i32 %y) { 132; CHECK-LABEL: @sdiv3( 133; CHECK: ret i32 0 134; 135; (X rem Y) / Y -> 0 136 %rem = srem i32 %x, %y 137 %div = sdiv i32 %rem, %y 138 ret i32 %div 139} 140 141define i32 @sdiv4(i32 %x, i32 %y) { 142; CHECK-LABEL: @sdiv4( 143; CHECK: ret i32 %x 144; 145; (X / Y) * Y -> X if the division is exact 146 %div = sdiv exact i32 %x, %y 147 %mul = mul i32 %div, %y 148 ret i32 %mul 149} 150 151define i32 @sdiv5(i32 %x, i32 %y) { 152; CHECK-LABEL: @sdiv5( 153; CHECK: ret i32 %x 154; 155; Y * (X / Y) -> X if the division is exact 156 %div = sdiv exact i32 %x, %y 157 %mul = mul i32 %y, %div 158 ret i32 %mul 159} 160 161 162define i32 @udiv1(i32 %x, i32 %y) { 163; CHECK-LABEL: @udiv1( 164; CHECK: ret i32 %x 165; 166; (no overflow X * Y) / Y -> X 167 %mul = mul nuw i32 %x, %y 168 %r = udiv i32 %mul, %y 169 ret i32 %r 170} 171 172define i32 @udiv2(i32 %x, i32 %y) { 173; CHECK-LABEL: @udiv2( 174; CHECK: [[DIV:%.*]] = udiv i32 %x, %y 175; CHECK-NEXT: ret i32 [[DIV]] 176; 177; (((X / Y) * Y) / Y) -> X / Y 178 %div = udiv i32 %x, %y 179 %mul = mul i32 %div, %y 180 %r = udiv i32 %mul, %y 181 ret i32 %r 182} 183 184define i32 @udiv3(i32 %x, i32 %y) { 185; CHECK-LABEL: @udiv3( 186; CHECK: ret i32 0 187; 188; (X rem Y) / Y -> 0 189 %rem = urem i32 %x, %y 190 %div = udiv i32 %rem, %y 191 ret i32 %div 192} 193 194define i32 @udiv4(i32 %x, i32 %y) { 195; CHECK-LABEL: @udiv4( 196; CHECK: ret i32 %x 197; 198; (X / Y) * Y -> X if the division is exact 199 %div = udiv exact i32 %x, %y 200 %mul = mul i32 %div, %y 201 ret i32 %mul 202} 203 204define i32 @udiv5(i32 %x, i32 %y) { 205; CHECK-LABEL: @udiv5( 206; CHECK: ret i32 %x 207; 208; Y * (X / Y) -> X if the division is exact 209 %div = udiv exact i32 %x, %y 210 %mul = mul i32 %y, %div 211 ret i32 %mul 212} 213 214define i16 @trunc1(i32 %x) { 215; CHECK-LABEL: @trunc1( 216; CHECK: ret i16 1 217; 218 %y = add i32 %x, 1 219 %tx = trunc i32 %x to i16 220 %ty = trunc i32 %y to i16 221 %d = sub i16 %ty, %tx 222 ret i16 %d 223} 224