[llvm-commits] PATCH: llvm-gcc option to emit "va_arg" instruction

[Chris Lattner]

This design point approach sounds great to me.  Duncan, can you review this?

-Chris

On Oct 13, 2010, at 5:07 AM, David Meyer wrote:

> Chris,
> 
> I've attached an alternative version of the patch which does not include the user-visible flag. 
> 
> Instead, to activate the emission of the va_arg instruction, you can modify TARGET_GIMPLIFY_VA_ARG_EXPR in the target configuration and recompile.
> 
> For example, in gcc/config/i386/i386.c:
> 
> #define TARGET_GIMPLIFY_VA_ARG_EXPR ix86_gimplify_va_arg
> 
> Can be changed to:
> 
> #define TARGET_GIMPLIFY_VA_ARG_EXPR llvm_gimplify_va_arg_expr
> 
> To activate va_arg for x86 and x86-64.
> 
> - David M
> <llvm-gcc-va-arg-3.patch>