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[PATCH, nds32] Committed: Fix CFI info for variadic function arguments.

From: Chung-Ju Wu <jasonwucj at gmail dot com>
To: gcc patches <gcc-patches at gcc dot gnu dot org>
Cc: Shiva Chen <shiva0217 at gmail dot com>
Date: Fri, 21 Nov 2014 15:41:04 +0800
Subject: [PATCH, nds32] Committed: Fix CFI info for variadic function arguments.
Authentication-results: sourceware.org; auth=none

Hi, all,

In nds32 ABI, the vararg arguments are pushed onto stack by callee.
However, those registers content are unnecessary to be restored.
We need to create an extra register note to inform gcc such information
so that it can generate correct CFI info for variadic function.


gcc/ChangeLog

2014-11-21  Chung-Ju Wu  <jasonwucj@gmail.com>

        * config/nds32/nds32.c (nds32_emit_stack_push_multiple): Add new
        vaarg_p argument and create correct CFI info.
        (nds32_expand_prologue): Pass true or false to
        nds32_emit_stack_push_multiple function.


Committed as Rev. 217903: https://gcc.gnu.org/r217903


Best regards,
jasonwucj

Attachment: 0003-Fix-CFI-for-variadic-function-arguments.patch
Description: Binary data

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