1 ; This test makes sure that shift instructions are properly eliminated 2 ; even with arbitrary precision integers. 3 ; RUN: opt < %s -instcombine -S | FileCheck %s 4 5 ; CHECK-LABEL: @test1( 6 ; CHECK-NOT: sh 7 define i47 @test1(i47 %A) { 8 %B = shl i47 %A, 0 ; <i47> [#uses=1] 9 ret i47 %B 10 } 11 12 ; CHECK-LABEL: @test2( 13 ; CHECK-NOT: sh 14 define i41 @test2(i7 %X) { 15 %A = zext i7 %X to i41 ; <i41> [#uses=1] 16 %B = shl i41 0, %A ; <i41> [#uses=1] 17 ret i41 %B 18 } 19 20 ; CHECK-LABEL: @test3( 21 ; CHECK-NOT: sh 22 define i41 @test3(i41 %A) { 23 %B = ashr i41 %A, 0 ; <i41> [#uses=1] 24 ret i41 %B 25 } 26 27 ; CHECK-LABEL: @test4( 28 ; CHECK-NOT: sh 29 define i39 @test4(i7 %X) { 30 %A = zext i7 %X to i39 ; <i39> [#uses=1] 31 %B = ashr i39 0, %A ; <i39> [#uses=1] 32 ret i39 %B 33 } 34 35 ; CHECK-LABEL: @test5( 36 ; CHECK-NOT: sh 37 define i55 @test5(i55 %A) { 38 %B = lshr i55 %A, 55 ; <i55> [#uses=1] 39 ret i55 %B 40 } 41 42 ; CHECK-LABEL: @test5a( 43 ; CHECK-NOT: sh 44 define i32 @test5a(i32 %A) { 45 %B = shl i32 %A, 32 ; <i32> [#uses=1] 46 ret i32 %B 47 } 48 49 ; CHECK-LABEL: @test6( 50 ; CHECK: mul i55 %A, 6 51 define i55 @test6(i55 %A) { 52 %B = shl i55 %A, 1 ; <i55> [#uses=1] 53 %C = mul i55 %B, 3 ; <i55> [#uses=1] 54 ret i55 %C 55 } 56 57 ; CHECK-LABEL: @test6a( 58 ; CHECK: mul i55 %A, 6 59 define i55 @test6a(i55 %A) { 60 %B = mul i55 %A, 3 ; <i55> [#uses=1] 61 %C = shl i55 %B, 1 ; <i55> [#uses=1] 62 ret i55 %C 63 } 64 65 ; CHECK-LABEL: @test7( 66 ; CHECK-NOT: sh 67 define i29 @test7(i8 %X) { 68 %A = zext i8 %X to i29 ; <i29> [#uses=1] 69 %B = ashr i29 -1, %A ; <i29> [#uses=1] 70 ret i29 %B 71 } 72 73 ; CHECK-LABEL: @test8( 74 ; CHECK-NOT: sh 75 define i7 @test8(i7 %A) { 76 %B = shl i7 %A, 4 ; <i7> [#uses=1] 77 %C = shl i7 %B, 3 ; <i7> [#uses=1] 78 ret i7 %C 79 } 80 81 ; CHECK-LABEL: @test9( 82 ; CHECK-NOT: sh 83 define i17 @test9(i17 %A) { 84 %B = shl i17 %A, 16 ; <i17> [#uses=1] 85 %C = lshr i17 %B, 16 ; <i17> [#uses=1] 86 ret i17 %C 87 } 88 89 ; CHECK-LABEL: @test10( 90 ; CHECK-NOT: sh 91 define i19 @test10(i19 %A) { 92 %B = lshr i19 %A, 18 ; <i19> [#uses=1] 93 %C = shl i19 %B, 18 ; <i19> [#uses=1] 94 ret i19 %C 95 } 96 97 ; CHECK-LABEL: @test11( 98 ; Don't hide the shl from scalar evolution. DAGCombine will get it. 99 ; CHECK: shl 100 define i23 @test11(i23 %A) { 101 %a = mul i23 %A, 3 ; <i23> [#uses=1] 102 %B = lshr i23 %a, 11 ; <i23> [#uses=1] 103 %C = shl i23 %B, 12 ; <i23> [#uses=1] 104 ret i23 %C 105 } 106 107 ; CHECK-LABEL: @test12( 108 ; CHECK-NOT: sh 109 define i47 @test12(i47 %A) { 110 %B = ashr i47 %A, 8 ; <i47> [#uses=1] 111 %C = shl i47 %B, 8 ; <i47> [#uses=1] 112 ret i47 %C 113 } 114 115 ; CHECK-LABEL: @test13( 116 ; Don't hide the shl from scalar evolution. DAGCombine will get it. 117 ; CHECK: shl 118 define i18 @test13(i18 %A) { 119 %a = mul i18 %A, 3 ; <i18> [#uses=1] 120 %B = ashr i18 %a, 8 ; <i18> [#uses=1] 121 %C = shl i18 %B, 9 ; <i18> [#uses=1] 122 ret i18 %C 123 } 124 125 ; CHECK-LABEL: @test14( 126 ; CHECK-NOT: sh 127 define i35 @test14(i35 %A) { 128 %B = lshr i35 %A, 4 ; <i35> [#uses=1] 129 %C = or i35 %B, 1234 ; <i35> [#uses=1] 130 %D = shl i35 %C, 4 ; <i35> [#uses=1] 131 ret i35 %D 132 } 133 134 ; CHECK-LABEL: @test14a( 135 ; CHECK-NOT: sh 136 define i79 @test14a(i79 %A) { 137 %B = shl i79 %A, 4 ; <i79> [#uses=1] 138 %C = and i79 %B, 1234 ; <i79> [#uses=1] 139 %D = lshr i79 %C, 4 ; <i79> [#uses=1] 140 ret i79 %D 141 } 142 143 ; CHECK-LABEL: @test15( 144 ; CHECK-NOT: sh 145 define i45 @test15(i1 %C) { 146 %A = select i1 %C, i45 3, i45 1 ; <i45> [#uses=1] 147 %V = shl i45 %A, 2 ; <i45> [#uses=1] 148 ret i45 %V 149 } 150 151 ; CHECK-LABEL: @test15a( 152 ; CHECK-NOT: sh 153 define i53 @test15a(i1 %X) { 154 %A = select i1 %X, i8 3, i8 1 ; <i8> [#uses=1] 155 %B = zext i8 %A to i53 ; <i53> [#uses=1] 156 %V = shl i53 64, %B ; <i53> [#uses=1] 157 ret i53 %V 158 } 159 160 ; CHECK-LABEL: @test16( 161 ; CHECK-NOT: sh 162 define i1 @test16(i84 %X) { 163 %tmp.3 = ashr i84 %X, 4 ; <i84> [#uses=1] 164 %tmp.6 = and i84 %tmp.3, 1 ; <i84> [#uses=1] 165 %tmp.7 = icmp ne i84 %tmp.6, 0 ; <i1> [#uses=1] 166 ret i1 %tmp.7 167 } 168 169 ; CHECK-LABEL: @test17( 170 ; CHECK-NOT: sh 171 define i1 @test17(i106 %A) { 172 %B = lshr i106 %A, 3 ; <i106> [#uses=1] 173 %C = icmp eq i106 %B, 1234 ; <i1> [#uses=1] 174 ret i1 %C 175 } 176 177 ; CHECK-LABEL: @test18( 178 ; CHECK-NOT: sh 179 define i1 @test18(i11 %A) { 180 %B = lshr i11 %A, 10 ; <i11> [#uses=1] 181 %C = icmp eq i11 %B, 123 ; <i1> [#uses=1] 182 ret i1 %C 183 } 184 185 ; CHECK-LABEL: @test19( 186 ; CHECK-NOT: sh 187 define i1 @test19(i37 %A) { 188 %B = ashr i37 %A, 2 ; <i37> [#uses=1] 189 %C = icmp eq i37 %B, 0 ; <i1> [#uses=1] 190 ret i1 %C 191 } 192 193 ; CHECK-LABEL: @test19a( 194 ; CHECK-NOT: sh 195 define i1 @test19a(i39 %A) { 196 %B = ashr i39 %A, 2 ; <i39> [#uses=1] 197 %C = icmp eq i39 %B, -1 ; <i1> [#uses=1] 198 ret i1 %C 199 } 200 201 ; CHECK-LABEL: @test20( 202 ; CHECK-NOT: sh 203 define i1 @test20(i13 %A) { 204 %B = ashr i13 %A, 12 ; <i13> [#uses=1] 205 %C = icmp eq i13 %B, 123 ; <i1> [#uses=1] 206 ret i1 %C 207 } 208 209 ; CHECK-LABEL: @test21( 210 ; CHECK-NOT: sh 211 define i1 @test21(i12 %A) { 212 %B = shl i12 %A, 6 ; <i12> [#uses=1] 213 %C = icmp eq i12 %B, -128 ; <i1> [#uses=1] 214 ret i1 %C 215 } 216 217 ; CHECK-LABEL: @test22( 218 ; CHECK-NOT: sh 219 define i1 @test22(i14 %A) { 220 %B = shl i14 %A, 7 ; <i14> [#uses=1] 221 %C = icmp eq i14 %B, 0 ; <i1> [#uses=1] 222 ret i1 %C 223 } 224 225 ; CHECK-LABEL: @test23( 226 ; CHECK-NOT: sh 227 define i11 @test23(i44 %A) { 228 %B = shl i44 %A, 33 ; <i44> [#uses=1] 229 %C = ashr i44 %B, 33 ; <i44> [#uses=1] 230 %D = trunc i44 %C to i11 ; <i8> [#uses=1] 231 ret i11 %D 232 } 233 234 ; CHECK-LABEL: @test25( 235 ; CHECK-NOT: sh 236 define i37 @test25(i37 %tmp.2, i37 %AA) { 237 %x = lshr i37 %AA, 17 ; <i37> [#uses=1] 238 %tmp.3 = lshr i37 %tmp.2, 17 ; <i37> [#uses=1] 239 %tmp.5 = add i37 %tmp.3, %x ; <i37> [#uses=1] 240 %tmp.6 = shl i37 %tmp.5, 17 ; <i37> [#uses=1] 241 ret i37 %tmp.6 242 } 243 244 ; CHECK-LABEL: @test26( 245 ; CHECK-NOT: sh 246 define i40 @test26(i40 %A) { 247 %B = lshr i40 %A, 1 ; <i40> [#uses=1] 248 %C = bitcast i40 %B to i40 ; <i40> [#uses=1] 249 %D = shl i40 %C, 1 ; <i40> [#uses=1] 250 ret i40 %D 251 } 252
