[LLVMdev] Stack alignment on X86 AVX seems incorrect

[Demikhovsky, Elena]

When stack is unaligned, LLVM should generate vmovups instead of vmovaps.

- Elena

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Joerg Sonnenberger
Sent: Thursday, March 01, 2012 20:31
To: llvmdev at cs.uiuc.edu
Subject: Re: [LLVMdev] Stack alignment on X86 AVX seems incorrect

On Thu, Mar 01, 2012 at 06:16:46PM +0000, Demikhovsky, Elena wrote:
> vmovaps should not access stack if it is not aligned to 32

I'm not completely sure I understand your problem. Are you saying that
the generated code assumes 256bit alignment, your default stack
alignment is 128bit and LLVM doesn't adjust it automatically?

Joerg
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