1 ; RUN: opt < %s -scalarrepl -S | FileCheck %s
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"
5 ;; Store of integer to whole alloca struct.
6 define i32 @test1(i64 %V) nounwind {
9 %X = alloca {{i32, i32}}
10 %Y = bitcast {{i32,i32}}* %X to i64*
13 %A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0
14 %B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1
21 ;; Store of integer to whole struct/array alloca.
22 define float @test2(i128 %V) nounwind {
25 %X = alloca {[4 x float]}
26 %Y = bitcast {[4 x float]}* %X to i128*
27 store i128 %V, i128* %Y
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
33 %c = fadd float %a, %b
37 ;; Load of whole alloca struct as integer
38 define i64 @test3(i32 %a, i32 %b) nounwind {
41 %X = alloca {{i32, i32}}
43 %A = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 0
44 %B = getelementptr {{i32,i32}}* %X, i32 0, i32 0, i32 1
48 %Y = bitcast {{i32,i32}}* %X to i64*
53 ;; load of integer from whole struct/array alloca.
54 define i128 @test4(float %a, float %b) nounwind {
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
63 %Y = bitcast {[4 x float]}* %X to i128*
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) {
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)
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) {
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)
105 declare %homogeneous @test6callee(i8* nocapture) nounwind
107 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind