[LLVMdev] GetElementPtrConstantExpr

[Óscar Fuentes]

Alessio Giovanni Baroni <alessiogiovanni.baroni at gmail.com> writes:

> Because I need to convert an [4 x i8] type to i8* in the instantiation of a
> GlobalVariable.
> I have the follow declaration: %xxx = type { i8* } and I must emit the
> following variable:
> @yyy = linkonce_odr constant %xxx { [4 x i8] c"hello\00" }, but it's wrong.
>
> How do I do?

You can use the ConstantExpr::getBitCast static member function:

http://llvm.org/doxygen/classllvm_1_1ConstantExpr.html#aba93ec4079f8d709a1d5b4745310782e

This is a common idiom on LLVM: a base class has static methods for
creating instances of derived classes.