1 ; RUN: opt < %s -scalarrepl -S | FileCheck %s 2 ; PR3290 3 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64" 4 5 ;; Store of integer to whole alloca struct. 6 define i32 @test1(i64 %V) nounwind { 7 ; CHECK: test1 8 ; CHECK-NOT: alloca 9 %X = alloca {{i32, i32}} 10 %Y = bitcast {{i32,i32}}* %X to i64* 11 store i64 %V, i64* %Y 12 13 %A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0 14 %B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1 15 %a = load i32* %A 16 %b = load i32* %B 17 %c = add i32 %a, %b 18 ret i32 %c 19 } 20 21 ;; Store of integer to whole struct/array alloca. 22 define float @test2(i128 %V) nounwind { 23 ; CHECK: test2 24 ; CHECK-NOT: alloca 25 %X = alloca {[4 x float]} 26 %Y = bitcast {[4 x float]}* %X to i128* 27 store i128 %V, i128* %Y 28 29 %A = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 0 30 %B = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 3 31 %a = load float* %A 32 %b = load float* %B 33 %c = fadd float %a, %b 34 ret float %c 35 } 36 37 ;; Load of whole alloca struct as integer 38 define i64 @test3(i32 %a, i32 %b) nounwind { 39 ; CHECK: test3 40 ; CHECK-NOT: alloca 41 %X = alloca {{i32, i32}} 42 43 %A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0 44 %B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1 45 store i32 %a, i32* %A 46 store i32 %b, i32* %B 47 48 %Y = bitcast {{i32,i32}}* %X to i64* 49 %Z = load i64* %Y 50 ret i64 %Z 51 } 52 53 ;; load of integer from whole struct/array alloca. 54 define i128 @test4(float %a, float %b) nounwind { 55 ; CHECK: test4 56 ; CHECK-NOT: alloca 57 %X = alloca {[4 x float]} 58 %A = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 0 59 %B = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 3 60 store float %a, float* %A 61 store float %b, float* %B 62 63 %Y = bitcast {[4 x float]}* %X to i128* 64 %V = load i128* %Y 65 ret i128 %V 66 } 67 68 ;; If the elements of a struct or array alloca contain padding, SROA can still 69 ;; split up the alloca as long as there is no padding between the elements. 70 %padded = type { i16, i8 } 71 define void @test5([4 x %padded]* %p, [4 x %padded]* %q) { 72 entry: 73 ; CHECK: test5 74 ; CHECK-NOT: i128 75 %var = alloca [4 x %padded], align 4 76 %vari8 = bitcast [4 x %padded]* %var to i8* 77 %pi8 = bitcast [4 x %padded]* %p to i8* 78 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %vari8, i8* %pi8, i32 16, i32 4, i1 false) 79 %qi8 = bitcast [4 x %padded]* %q to i8* 80 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %qi8, i8* %vari8, i32 16, i32 4, i1 false) 81 ret void 82 } 83 84 ;; Check that an array alloca can be split up when it is also accessed with 85 ;; a load or store as a homogeneous structure with the same element type and 86 ;; number of elements as the array. 87 %homogeneous = type { <8 x i16>, <8 x i16>, <8 x i16> } 88 %wrapped_array = type { [3 x <8 x i16>] } 89 define void @test6(i8* %p, %wrapped_array* %arr) { 90 entry: 91 ; CHECK: test6 92 ; CHECK: store <8 x i16> 93 ; CHECK: store <8 x i16> 94 ; CHECK: store <8 x i16> 95 %var = alloca %wrapped_array, align 16 96 %res = call %homogeneous @test6callee(i8* %p) 97 %varcast = bitcast %wrapped_array* %var to %homogeneous* 98 store %homogeneous %res, %homogeneous* %varcast 99 %tmp1 = bitcast %wrapped_array* %arr to i8* 100 %tmp2 = bitcast %wrapped_array* %var to i8* 101 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp1, i8* %tmp2, i32 48, i32 16, i1 false) 102 ret void 103 } 104 105 declare %homogeneous @test6callee(i8* nocapture) nounwind 106 107 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind 108
