2
我有两个全局结构类型声明,其中一个是另一个的“子类型”。我想定义一个全局变量,更具体的类型,但让全局变量有更多的普通型:在LLVM中投射一个全局定义IR
我尝试这样做:
%hs = type { %hs* (%hs*)* }
%dc = type { %hs* (%hs*)*, i64, [1 x %hs*] }
@boring = constant %hs { %hs* (%hs*)* null }
; this works, but has type %dc* instead of %hs*
@foo = constant %dc { %hs* (%hs*)* null, i64 1, [1 x %hs*] [ %hs* @boring ] }
; this does not
@bar = constant %hs bitcast (%dc @foo to %hs)
; this tests that @bar indeed has the desired type
@test = constant %dc { %hs* (%hs*)* null, i64 1, [1 x %hs*] [ %hs* @bar ] }
但是失败
llc-4.0: foo.ll:10:34: error: global variable reference must have pointer type
@bar = constant %hs bitcast (%dc @foo to %hs)
有没有办法让@bar
定义如上,但有hs*
?
理想情况下在一个定义中?