This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

[PATCH] Handle truncate of a memory location

From: Andrew Pinski <pinskia at gmail dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Mon, 27 Aug 2012 14:21:12 -0700
Subject: [PATCH] Handle truncate of a memory location

Hi,
  A truncate of a memory location can be simplified to a memory load
just like what is done for a subreg of a memory load.
This patch adds that simplification to simplify-rtx.c.

OK? Bootstrapped and tested on mips64-linux-gnu with no regressions.

Thanks,
Andrew Pinski

ChangeLog:

* simplify-rtx.c (simplify_unary_operation_1 <case TRUNCATE>):
A truncate of a memory is just loading the low part of the memory.

testsuite/ChangeLog:
* gcc.target/mips/truncate-8.c: New testcase.

Attachment: improvetruncatememory.diff.txt
Description: Text document

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]