[llvm-commits] representing the alignment of a function argument

[Rafael Espindola]

To handle calls to functions with byval arguments, the code generator
must create copies of those arguments. To do that efficiently, it
needs to know the alignment.

On x86-64, all stack arguments are 8 byte aligned. I am trying to find
out how to represent that on LLVM.

The GCC way would be to add another method to the subtarget that given
a type returns the assured stack alignment of arguments.

Another way would be to make the FE handle the stack and issue
llvm.memcpy with the correct alignment :-)

Thoughts?

Cheers,
-- 
Rafael Avila de Espindola

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