[m-dev.] argument packing
jfischer at opturion.com
Thu May 17 12:12:44 AEST 2018
On Thu, 17 May 2018, Peter Wang wrote:
> On Thu, 17 May 2018 01:26:10 +0200 (CEST), "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
>> diff --git a/compiler/handle_options.m b/compiler/handle_options.m
>> index dce8cd8..6695702 100644
>> --- a/compiler/handle_options.m
>> +++ b/compiler/handle_options.m
>> @@ -1344,14 +1344,17 @@ convert_options_to_globals(OptionTable0, OpMode, Target,
>> % Argument packing only works on C back-ends with low-level data.
>> - % In the future, we may want to use C bit-field syntax for high-level data.
>> - % For other back-ends, any RTTI code will need to be updated to cope with
>> - % packed arguments.
>> - %
>> - % Only C targets may store a constructor argument across two words.
>> - option_implies(highlevel_data, arg_pack_bits, int(0), !Globals),
>> - (
>> + % In the future, we may want to use C bit-field syntax on C backends
>> + % with high-level data. For the other target languages, implementing
>> + % argument packing will not just a lot of work on RTTI, but also
The wording of that comment is awry too.
>> + % generalizing field addressing, to allow both single fields and
>> + % a group of adjacent fields packed into a single word to be
>> + % addressed via a mechanism other than an argument's name.
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