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

[David Meyer]

Hi Duncan,

The code was written by someone with a deeper understanding of gcc than
myself, so I can't give an entirely perfect answer, but...

I believe that VA_ARG_EXPR is only supposed to exist in the intermediate
representation. It is expected to be lowered during gimplification. For
example, in expand_expr(), there is an assertion if VA_ARG_EXPR is seen in
the gimplified tree.

- David M
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