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AltiVec stack boundary

From: Daniel Jacobowitz <drow at false dot org>
To: gcc at gcc dot gnu dot org
Date: Tue, 7 Aug 2007 10:39:36 -0400
Subject: AltiVec stack boundary

I'm sure this has come up before, but I don't understand how the
-maltivec definition of STACK_BOUNDARY can be right.  We tell the
compiler that STACK_BOUNDARY == 128 if -maltivec, without telling it
that other people may ignore that, because -maltivec is not supposed
to be an ABI changing option but IIUC STACK_BOUNDARY is.

Why isn't it 64 in the !TARGET_ALTIVEC case with
PREFERRED_STACK_BOUNDARY == 128?

-- 
Daniel Jacobowitz
CodeSourcery

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