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[PATCH, nds32] Committed: Have shrink-wrapping optimization to be performed on nds32 target.

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: Tue, 20 Jan 2015 15:14:54 +0800
Subject: [PATCH, nds32] Committed: Have shrink-wrapping optimization to be performed on nds32 target.
Authentication-results: sourceware.org; auth=none

Hi, all,

It is reported that the nds32 port on trunk cannot perform shrink-wrapping
optimization because there is missing named pattern "simple_return".
So we define that named pattern to fix the issue.

This patch was committed last week before stage 4:
  https://gcc.gnu.org/r219711


gcc/ChangeLog

2015-01-16  Chung-Ju Wu  <jasonwucj@gmail.com>

        * config/nds32/nds32-protos.h (nds32_can_use_return_insn): New.
        * config/nds32/nds32.md (unspec_volatile_func_return): Remove.
        (return_internal): New.
        (return): Define this named pattern.
        (simple_return): Define this named pattern.
        * config/nds32/nds32.c (nds32_expand_epilogue): Emit return_internal
        pattern instead of unspec_volatile_func_return.
        (nds32_expand_epilogue_v3pop): Likewise.
        (nds32_can_use_return_insn): New function.


Best regards,
jasonwucj

Attachment: 0008-Use-simple_return-named-pattern-so-that-shirnk-wrapp.patch
Description: Binary data

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