From patchwork Mon Aug  2 10:09:37 2010
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Subject: Resubmit/Ping^n ARM ldm/stm peepholes
Date: Mon, 02 Aug 2010 00:09:37 -0000
From: Bernd Schmidt <bernds@codesourcery.com>
X-Patchwork-Id: 60528
Message-Id: <4C569961.8040803@codesourcery.com>
To: Richard Earnshaw <rearnsha@arm.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>

(note gcc-patches Cc re-added)

On 07/31/2010 02:46 PM, Richard Earnshaw wrote:
> On Wed, 2010-07-07 at 12:55 +0100, Bernd Schmidt wrote:
>> Here's an updated version of my ldm/stm peepholes patch for current
>> trunk.
>> Ok?
>>
> 
> OK,

Thanks!

I've taken the liberty of also committing two testcases for it which
were missing from the patch submission.  They pass my arm-linux tests
with march=armv7-a/mthumb, mthumb, and plain ARM.

We can still decide whether arm-ldmstm.ml is the master copy or just
documentation.


Bernd


Index: testsuite/gcc.target/arm/pr40457-1.c
===================================================================
--- testsuite/gcc.target/arm/pr40457-1.c	(revision 0)
+++ testsuite/gcc.target/arm/pr40457-1.c	(revision 0)
@@ -0,0 +1,10 @@
+/* { dg-options "-Os" }  */
+/* { dg-do compile } */
+
+int bar(int* p)
+{
+  int x = p[0] + p[1];
+  return x;
+}
+
+/* { dg-final { scan-assembler "ldm" } } */
Index: testsuite/gcc.target/arm/pr40457-2.c
===================================================================
--- testsuite/gcc.target/arm/pr40457-2.c	(revision 0)
+++ testsuite/gcc.target/arm/pr40457-2.c	(revision 0)
@@ -0,0 +1,10 @@
+/* { dg-options "-O2" }  */
+/* { dg-do compile } */
+
+void foo(int* p)
+{
+  p[0] = 1;
+  p[1] = 0;
+}
+
+/* { dg-final { scan-assembler "stm" } } */