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; RUN: opt -S -instcombine < %s | FileCheck %s
; Instcombine should preserve metadata and alignment while
; folding a bitcast into a store.
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"
%struct.A = type { i32 (...)** }
@G = external constant [5 x i8*]
; CHECK-LABEL: @foo
; CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([5 x i8*]* @G, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 16, !tag !0
define void @foo(%struct.A* %a) nounwind {
entry:
%0 = bitcast %struct.A* %a to i8***
store i8** getelementptr inbounds ([5 x i8*]* @G, i64 0, i64 2), i8*** %0, align 16, !tag !0
ret void
}
; Check instcombine doesn't try and fold the following bitcast into the store.
; This transformation would not be safe since we would need to use addrspacecast
; and addrspacecast is not guaranteed to be a no-op cast.
; CHECK-LABEL: @bar
; CHECK: %cast = bitcast i8** %b to i8 addrspace(1)**
; CHECK: store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
define void @bar(i8 addrspace(1)* %a, i8** %b) nounwind {
entry:
%cast = bitcast i8** %b to i8 addrspace(1)**
store i8 addrspace(1)* %a, i8 addrspace(1)** %cast
ret void
}
!0 = metadata !{metadata !"hello"}
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