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Re: Fortran, complex types, and STRICT_ALIGNMENT

From: Richard Henderson <rth at redhat dot com>
To: "James A. Morrison" <ja2morri at csclub dot uwaterloo dot ca>
Cc: Steve Kargl <sgk at troutmask dot apl dot washington dot edu>, gcc at gcc dot gnu dot org, fortran at gcc dot gnu dot org
Date: Wed, 12 Jan 2005 16:10:10 -0800
Subject: Re: Fortran, complex types, and STRICT_ALIGNMENT
References: <20050112132654.1B595A85A9@perpugilliam.csclub.uwaterloo.ca> <20050112192703.GA17406@troutmask.apl.washington.edu> <kfh8y6y1ku7.fsf@csclub.uwaterloo.ca>

On Wed, Jan 12, 2005 at 02:57:52PM -0500, James A. Morrison wrote:
>  I'll try upping the alignment for complex types on STRICT_ALIGNMENT
> targets to see what results I get.

You'll get abi breakage, that's what.  You can either:

(1) tell the library routines know they're working on complex types
    and so they need to halve the amount of alignment they can assume,

(2) tell the library routines they're dealing with twice as much
    scalar data.



r~

References:
- Fortran, complex types, and STRICT_ALIGNMENT
  - From: James Morrison
- Re: Fortran, complex types, and STRICT_ALIGNMENT
  - From: Steve Kargl
- Re: Fortran, complex types, and STRICT_ALIGNMENT
  - From: James A. Morrison

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