1 ; RUN: opt < %s -instcombine -S | FileCheck %s 2 3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" 4 target triple = "x86_64-apple-darwin10.0.0" 5 6 ; Bitcasts between vectors and scalars are valid. 7 ; PR4487 8 define i32 @test1(i64 %a) { 9 %t1 = bitcast i64 %a to <2 x i32> 10 %t2 = bitcast i64 %a to <2 x i32> 11 %t3 = xor <2 x i32> %t1, %t2 12 %t4 = extractelement <2 x i32> %t3, i32 0 13 ret i32 %t4 14 15 ; CHECK-LABEL: @test1( 16 ; CHECK: ret i32 0 17 } 18 19 ; Optimize bitcasts that are extracting low element of vector. This happens 20 ; because of SRoA. 21 ; rdar://7892780 22 define float @test2(<2 x float> %A, <2 x i32> %B) { 23 %tmp28 = bitcast <2 x float> %A to i64 ; <i64> [#uses=2] 24 %tmp23 = trunc i64 %tmp28 to i32 ; <i32> [#uses=1] 25 %tmp24 = bitcast i32 %tmp23 to float ; <float> [#uses=1] 26 27 %tmp = bitcast <2 x i32> %B to i64 28 %tmp2 = trunc i64 %tmp to i32 ; <i32> [#uses=1] 29 %tmp4 = bitcast i32 %tmp2 to float ; <float> [#uses=1] 30 31 %add = fadd float %tmp24, %tmp4 32 ret float %add 33 34 ; CHECK-LABEL: @test2( 35 ; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 0 36 ; CHECK-NEXT: bitcast <2 x i32> %B to <2 x float> 37 ; CHECK-NEXT: %tmp4 = extractelement <2 x float> {{.*}}, i32 0 38 ; CHECK-NEXT: %add = fadd float %tmp24, %tmp4 39 ; CHECK-NEXT: ret float %add 40 } 41 42 ; Optimize bitcasts that are extracting other elements of a vector. This 43 ; happens because of SRoA. 44 ; rdar://7892780 45 define float @test3(<2 x float> %A, <2 x i64> %B) { 46 %tmp28 = bitcast <2 x float> %A to i64 47 %tmp29 = lshr i64 %tmp28, 32 48 %tmp23 = trunc i64 %tmp29 to i32 49 %tmp24 = bitcast i32 %tmp23 to float 50 51 %tmp = bitcast <2 x i64> %B to i128 52 %tmp1 = lshr i128 %tmp, 64 53 %tmp2 = trunc i128 %tmp1 to i32 54 %tmp4 = bitcast i32 %tmp2 to float 55 56 %add = fadd float %tmp24, %tmp4 57 ret float %add 58 59 ; CHECK-LABEL: @test3( 60 ; CHECK-NEXT: %tmp24 = extractelement <2 x float> %A, i32 1 61 ; CHECK-NEXT: bitcast <2 x i64> %B to <4 x float> 62 ; CHECK-NEXT: %tmp4 = extractelement <4 x float> {{.*}}, i32 2 63 ; CHECK-NEXT: %add = fadd float %tmp24, %tmp4 64 ; CHECK-NEXT: ret float %add 65 } 66 67 ; Both bitcasts are unnecessary; change the extractelement. 68 69 define float @bitcast_extelt1(<2 x float> %A) { 70 %bc1 = bitcast <2 x float> %A to <2 x i32> 71 %ext = extractelement <2 x i32> %bc1, i32 0 72 %bc2 = bitcast i32 %ext to float 73 ret float %bc2 74 75 ; CHECK-LABEL: @bitcast_extelt1( 76 ; CHECK-NEXT: %bc2 = extractelement <2 x float> %A, i32 0 77 ; CHECK-NEXT: ret float %bc2 78 } 79 80 ; Second bitcast can be folded into the first. 81 82 define i64 @bitcast_extelt2(<4 x float> %A) { 83 %bc1 = bitcast <4 x float> %A to <2 x double> 84 %ext = extractelement <2 x double> %bc1, i32 1 85 %bc2 = bitcast double %ext to i64 86 ret i64 %bc2 87 88 ; CHECK-LABEL: @bitcast_extelt2( 89 ; CHECK-NEXT: %bc = bitcast <4 x float> %A to <2 x i64> 90 ; CHECK-NEXT: %bc2 = extractelement <2 x i64> %bc, i32 1 91 ; CHECK-NEXT: ret i64 %bc2 92 } 93 94 ; TODO: This should return %A. 95 96 define <2 x i32> @bitcast_extelt3(<2 x i32> %A) { 97 %bc1 = bitcast <2 x i32> %A to <1 x i64> 98 %ext = extractelement <1 x i64> %bc1, i32 0 99 %bc2 = bitcast i64 %ext to <2 x i32> 100 ret <2 x i32> %bc2 101 102 ; CHECK-LABEL: @bitcast_extelt3( 103 ; CHECK-NEXT: %bc1 = bitcast <2 x i32> %A to <1 x i64> 104 ; CHECK-NEXT: %ext = extractelement <1 x i64> %bc1, i32 0 105 ; CHECK-NEXT: %bc2 = bitcast i64 %ext to <2 x i32> 106 ; CHECK-NEXT: ret <2 x i32> %bc2 107 } 108 109 ; Handle the case where the input is not a vector. 110 111 define double @bitcast_extelt4(i128 %A) { 112 %bc1 = bitcast i128 %A to <2 x i64> 113 %ext = extractelement <2 x i64> %bc1, i32 0 114 %bc2 = bitcast i64 %ext to double 115 ret double %bc2 116 117 ; CHECK-LABEL: @bitcast_extelt4( 118 ; CHECK-NEXT: %bc = bitcast i128 %A to <2 x double> 119 ; CHECK-NEXT: %bc2 = extractelement <2 x double> %bc, i32 0 120 ; CHECK-NEXT: ret double %bc2 121 } 122 123 define <2 x i32> @test4(i32 %A, i32 %B){ 124 %tmp38 = zext i32 %A to i64 125 %tmp32 = zext i32 %B to i64 126 %tmp33 = shl i64 %tmp32, 32 127 %ins35 = or i64 %tmp33, %tmp38 128 %tmp43 = bitcast i64 %ins35 to <2 x i32> 129 ret <2 x i32> %tmp43 130 ; CHECK-LABEL: @test4( 131 ; CHECK-NEXT: insertelement <2 x i32> undef, i32 %A, i32 0 132 ; CHECK-NEXT: insertelement <2 x i32> {{.*}}, i32 %B, i32 1 133 ; CHECK-NEXT: ret <2 x i32> 134 135 } 136 137 ; rdar://8360454 138 define <2 x float> @test5(float %A, float %B) { 139 %tmp37 = bitcast float %A to i32 140 %tmp38 = zext i32 %tmp37 to i64 141 %tmp31 = bitcast float %B to i32 142 %tmp32 = zext i32 %tmp31 to i64 143 %tmp33 = shl i64 %tmp32, 32 144 %ins35 = or i64 %tmp33, %tmp38 145 %tmp43 = bitcast i64 %ins35 to <2 x float> 146 ret <2 x float> %tmp43 147 ; CHECK-LABEL: @test5( 148 ; CHECK-NEXT: insertelement <2 x float> undef, float %A, i32 0 149 ; CHECK-NEXT: insertelement <2 x float> {{.*}}, float %B, i32 1 150 ; CHECK-NEXT: ret <2 x float> 151 } 152 153 define <2 x float> @test6(float %A){ 154 %tmp23 = bitcast float %A to i32 ; <i32> [#uses=1] 155 %tmp24 = zext i32 %tmp23 to i64 ; <i64> [#uses=1] 156 %tmp25 = shl i64 %tmp24, 32 ; <i64> [#uses=1] 157 %mask20 = or i64 %tmp25, 1109917696 ; <i64> [#uses=1] 158 %tmp35 = bitcast i64 %mask20 to <2 x float> ; <<2 x float>> [#uses=1] 159 ret <2 x float> %tmp35 160 ; CHECK-LABEL: @test6( 161 ; CHECK-NEXT: insertelement <2 x float> <float 4.200000e+01, float undef>, float %A, i32 1 162 ; CHECK: ret 163 } 164 165 define i64 @ISPC0(i64 %in) { 166 %out = and i64 %in, xor (i64 bitcast (<4 x i16> <i16 -1, i16 -1, i16 -1, i16 -1> to i64), i64 -1) 167 ret i64 %out 168 ; CHECK-LABEL: @ISPC0( 169 ; CHECK: ret i64 0 170 } 171 172 173 define i64 @Vec2(i64 %in) { 174 %out = and i64 %in, xor (i64 bitcast (<4 x i16> <i16 0, i16 0, i16 0, i16 0> to i64), i64 0) 175 ret i64 %out 176 ; CHECK-LABEL: @Vec2( 177 ; CHECK: ret i64 0 178 } 179 180 define i64 @All11(i64 %in) { 181 %out = and i64 %in, xor (i64 bitcast (<2 x float> bitcast (i64 -1 to <2 x float>) to i64), i64 -1) 182 ret i64 %out 183 ; CHECK-LABEL: @All11( 184 ; CHECK: ret i64 0 185 } 186 187 188 define i32 @All111(i32 %in) { 189 %out = and i32 %in, xor (i32 bitcast (<1 x float> bitcast (i32 -1 to <1 x float>) to i32), i32 -1) 190 ret i32 %out 191 ; CHECK-LABEL: @All111( 192 ; CHECK: ret i32 0 193 } 194 195 define <2 x i16> @BitcastInsert(i32 %a) { 196 %v = insertelement <1 x i32> undef, i32 %a, i32 0 197 %r = bitcast <1 x i32> %v to <2 x i16> 198 ret <2 x i16> %r 199 ; CHECK-LABEL: @BitcastInsert( 200 ; CHECK: bitcast i32 %a to <2 x i16> 201 } 202 203 ; PR17293 204 define <2 x i64> @test7(<2 x i8*>* %arg) nounwind { 205 %cast = bitcast <2 x i8*>* %arg to <2 x i64>* 206 %load = load <2 x i64>, <2 x i64>* %cast, align 16 207 ret <2 x i64> %load 208 ; CHECK: @test7 209 ; CHECK: bitcast 210 ; CHECK: load 211 } 212
