[LLVMdev] ConstantExpr Handling?

[Duncan Sands]

Hi Brandon,

> I was wondering how exactly LLVM handles the ConstantExpr,
> specifically GEP ConstantExpr, in code generation. From what I'm
> reading, translating these Constant Expressions into Instructions can
> slow the code, so I'd like to be able to handle ConstantExpr in the
> same way that LLVM code generation does.

I think this is handled in lib/CodeGen/AsmPrinter/AsmPrinter.cpp in the
LowerConstant method.  It looks like it only handles the case where the
GEP indices are explicit integers (ConstantInt).

Ciao, Duncan.