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patch for correct mode use by LRA for save/restore generation

From: Vladimir Makarov <vmakarov at redhat dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Thu, 08 Aug 2013 16:57:26 -0400
Subject: patch for correct mode use by LRA for save/restore generation

The following patch implements correct mode use for save/restore generation.

The patch was successfully bootstrapped and tested on x86/x86-64, ppc64,s390.

The patch also makes some tuning in alternative matching and adds moredebugging printing.


Committed as rev. 201611.

2013-08-08  Vladimir Makarov  <vmakarov@redhat.com>

        * lra-constraints.c (emit_spill_move): Remove assert.
        (process_alt_operands): Add more debugging
        output.  Increase reject for spilling into memory.  Decrease
        reject for reloading scratch.
        (split_reg): Use HARD_REGNO_CALLER_SAVE_MODE.

Attachment: constraint.patch
Description: Text document

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