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Re: PATCH [mainline] - Fix passing of zero-sized structs in apple-ppc-darwin mixed mode

>>>>> Alan Modra writes:

> Here's the complete revised patch.

>	* config/rs6000/rs6000.c (rs6000_mixed_function_arg): Rewrite.
>	(function_arg): Use rs6000_arg_size rather than CLASS_MAX_NREGS in
>	calculating gpr size for altivec.  Simplify and correct
>	rs6000_mixed_function_arg calls.  Call rs6000_mixed_function_arg
>	for ABI_V4 gpr case too.  Fix off-by-one error in long double
>	reg test.  Generate the correct PARALLEL to handle long double
>	for ABI_AIX 32-bit.  Use this for -m32 -mpowerpc64 fpr case too.
>	(function_arg_partial_nregs): Align before calculating regs left.
>	Don't return info on partial fprs when we need info on gprs.
>	Correct long double fpr off-by-one error.

If all of the regressions reported by Fariborz's in his testing have been
addressed, this patch is okay to commit.

Thanks, David
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