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[PATCH, i386]: Fix PR 68263, Vector "*mov<mode>_internal" fails to handle misaligned load/store from reload

From: Uros Bizjak <ubizjak at gmail dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: "H.J. Lu" <hjl dot tools at gmail dot com>
Date: Tue, 17 Nov 2015 10:52:54 +0100
Subject: [PATCH, i386]: Fix PR 68263, Vector "*mov<mode>_internal" fails to handle misaligned load/store from reload
Authentication-results: sourceware.org; auth=none

Hello!

Attached patch fixes PR 68263. IAMCU ABI doesn't guarantee any
alignment, so we have to emit unaligned moves for SSE or AVX unaligned
operands.

2015-11-17  Uros Bizjak  <ubizjak@gmail.com>

    PR target/68263
    * config/i386/i386.h (BIGGEST_ALIGNMENT): Always define
    to 32 for IAMCU.
    * config/i386/sse.md (*mov<mode>_internal): Always enable
    AVX and SSE unaligned moves for IAMCU.

Patch fixes gcc.target/i386/iamcu/test_passing_floats.c execution
testsuite failure.

Patch was also tested by HJ on IAMCU target.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32},
committed to mainline SVN.

Uros.

Attachment: p.diff.txt
Description: Text document

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