forked from OSchip/llvm-project
108 lines
3.4 KiB
LLVM
108 lines
3.4 KiB
LLVM
; RUN: opt < %s -scalarrepl -S | FileCheck %s
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; PR3290
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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"
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;; Store of integer to whole alloca struct.
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define i32 @test1(i64 %V) nounwind {
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; CHECK: test1
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; CHECK-NOT: alloca
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%X = alloca {{i32, i32}}
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%Y = bitcast {{i32,i32}}* %X to i64*
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store i64 %V, i64* %Y
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%A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1
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%a = load i32* %A
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%b = load i32* %B
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%c = add i32 %a, %b
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ret i32 %c
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}
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;; Store of integer to whole struct/array alloca.
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define float @test2(i128 %V) nounwind {
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; CHECK: test2
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; CHECK-NOT: alloca
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%X = alloca {[4 x float]}
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%Y = bitcast {[4 x float]}* %X to i128*
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store i128 %V, i128* %Y
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%A = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 3
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%a = load float* %A
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%b = load float* %B
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%c = fadd float %a, %b
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ret float %c
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}
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;; Load of whole alloca struct as integer
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define i64 @test3(i32 %a, i32 %b) nounwind {
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; CHECK: test3
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; CHECK-NOT: alloca
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%X = alloca {{i32, i32}}
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%A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1
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store i32 %a, i32* %A
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store i32 %b, i32* %B
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%Y = bitcast {{i32,i32}}* %X to i64*
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%Z = load i64* %Y
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ret i64 %Z
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}
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;; load of integer from whole struct/array alloca.
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define i128 @test4(float %a, float %b) nounwind {
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; CHECK: test4
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; CHECK-NOT: alloca
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%X = alloca {[4 x float]}
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%A = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 0
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%B = getelementptr {[4 x float]}* %X, i32 0, i32 0, i32 3
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store float %a, float* %A
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store float %b, float* %B
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%Y = bitcast {[4 x float]}* %X to i128*
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%V = load i128* %Y
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ret i128 %V
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}
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;; If the elements of a struct or array alloca contain padding, SROA can still
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;; split up the alloca as long as there is no padding between the elements.
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%padded = type { i16, i8 }
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define void @test5([4 x %padded]* %p, [4 x %padded]* %q) {
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entry:
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; CHECK: test5
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; CHECK-NOT: i128
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%var = alloca [4 x %padded], align 4
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%vari8 = bitcast [4 x %padded]* %var to i8*
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%pi8 = bitcast [4 x %padded]* %p to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %vari8, i8* %pi8, i32 16, i32 4, i1 false)
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%qi8 = bitcast [4 x %padded]* %q to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %qi8, i8* %vari8, i32 16, i32 4, i1 false)
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ret void
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}
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;; Check that an array alloca can be split up when it is also accessed with
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;; a load or store as a homogeneous structure with the same element type and
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;; number of elements as the array.
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%homogeneous = type { <8 x i16>, <8 x i16>, <8 x i16> }
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%wrapped_array = type { [3 x <8 x i16>] }
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define void @test6(i8* %p, %wrapped_array* %arr) {
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entry:
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; CHECK: test6
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; CHECK: store <8 x i16>
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; CHECK: store <8 x i16>
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; CHECK: store <8 x i16>
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%var = alloca %wrapped_array, align 16
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%res = call %homogeneous @test6callee(i8* %p)
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%varcast = bitcast %wrapped_array* %var to %homogeneous*
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store %homogeneous %res, %homogeneous* %varcast
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%tmp1 = bitcast %wrapped_array* %arr to i8*
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%tmp2 = bitcast %wrapped_array* %var to i8*
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call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp1, i8* %tmp2, i32 48, i32 16, i1 false)
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ret void
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}
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declare %homogeneous @test6callee(i8* nocapture) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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