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Re: How to determine access alignment in RTL ?

From: Jim Wilson <wilson at specifixinc dot com>
To: Yossi Markovich <YOSSIM at il dot ibm dot com>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 17 Dec 2003 17:21:50 -0800
Subject: Re: How to determine access alignment in RTL ?
References: <OF22C38131.19389402-ONC2256DFF.004791E8-C2256DFF.004A1362@il.ibm.com>

Yossi Markovich wrote:

  typedef int aint __attribute__ ((__aligned__(128)));
  aint A[N];
  aint B[N];

Attribute align does not work that way for arrays. ints have size 32 bits, and thus a random array element has only 32-bit alignment. Even if we align the base address of A to 128 bits, A[1] is that address plus 32-bits, and thus can only have 32-bit alignment. If you want each array element to have 128-bit alignment, then the array elements must each be 128-bits in size. -- Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

References:
- How to determine access alignment in RTL ?
  - From: Yossi Markovich

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