Message 325207 - Python tracker

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Author	v2m
Recipients	amaury.forgeotdarc, belopolsky, mattneri, meador.inge, v2m
Date	2018-09-12.23:03:18
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1536793398.95.0.956365154283.issue34603@psf.upfronthosting.co.za>
In-reply-to

Content
I think the problem is that FFI layer assumes that MSVC compiler will try to pass any structure less than 8 bytes in registers whereis it is not always true: To be returned by value in RAX, user-defined types must have a length of 1, 2, 4, 8, 16, 32, or 64 bits (from https://msdn.microsoft.com/en-us/library/7572ztz4.aspx). I have a fix, now adding tests.

I think the problem is that FFI layer assumes that MSVC compiler will try to pass any structure less than 8 bytes in registers whereis it is not always true: 
To be returned by value in RAX, user-defined types must have a length of 1, 2, 4, 8, 16, 32, or 64 bits (from https://msdn.microsoft.com/en-us/library/7572ztz4.aspx).
I have a fix, now adding tests.

History
Date	User	Action	Args
2018-09-12 23:03:19	v2m	set	recipients: + v2m, amaury.forgeotdarc, belopolsky, meador.inge, mattneri
2018-09-12 23:03:18	v2m	set	messageid: <1536793398.95.0.956365154283.issue34603@psf.upfronthosting.co.za>
2018-09-12 23:03:18	v2m	link	issue34603 messages
2018-09-12 23:03:18	v2m	create