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patches/gcc/3.4.6/160-arm-ldm-peephole2.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Wed Oct 15 21:29:56 2008 +0000 (2008-10-15)
changeset 940 f0f9ba3f98f2
parent 746 b150d6f590fc
permissions -rw-r--r--
Cheesy kconfig stuff:
- silent/quiet/verbose build:
- ct-ng by default only prints quit messages, such as "CC xxx",
- if using V=0, nothing is printed,
- if using V=1, the full command lines are printed,
- other values are indeterminate,
- should help in debugging the kconfig stuff;
- complete kconfig/{,m}conf generation:
- fully dynamic dependencies on source files,
- compilation of .c into .o, then linking (instead of direct linking),
- VPATH usage when not --local;
Typo + a coment moved.

/trunk/kconfig/kconfig.mk | 140 87 53 0 +++++++++++++++++++++++++++++++++--------------------
/trunk/tools/tools.mk | 12 6 6 0 ++--
/trunk/steps.mk | 6 3 3 0 +-
/trunk/samples/samples.mk | 30 15 15 0 +++++-----
/trunk/ct-ng.in | 40 28 12 0 +++++++++++----
5 files changed, 139 insertions(+), 89 deletions(-) 
     1 diff -durN gcc-3.4.6.orig/gcc/config/arm/arm.c gcc-3.4.6/gcc/config/arm/arm.c

     2 --- gcc-3.4.6.orig/gcc/config/arm/arm.c	2007-08-15 22:57:51.000000000 +0200

     3 +++ gcc-3.4.6/gcc/config/arm/arm.c	2007-08-15 22:57:51.000000000 +0200

     4 @@ -4572,6 +4572,10 @@

     5  int

     6  adjacent_mem_locations (rtx a, rtx b)

     7  {

     8 +  /* We don't guarantee to preserve the order of these memory refs.  */

     9 +  if (volatile_refs_p (a) || volatile_refs_p (b))

    10 +    return 0;

    11 +

    12    if ((GET_CODE (XEXP (a, 0)) == REG

    13         || (GET_CODE (XEXP (a, 0)) == PLUS

    14  	   && GET_CODE (XEXP (XEXP (a, 0), 1)) == CONST_INT))

    15 @@ -4611,6 +4615,17 @@

    16  	return 0;

    17  

    18        val_diff = val1 - val0;

    19 +

    20 +      if (arm_ld_sched)

    21 +	{

    22 +	  /* If the target has load delay slots, then there's no benefit

    23 +	     to using an ldm instruction unless the offset is zero and

    24 +	     we are optimizing for size.  */

    25 +	  return (optimize_size && (REGNO (reg0) == REGNO (reg1))

    26 +		  && (val0 == 0 || val1 == 0 || val0 == 4 || val1 == 4)

    27 +		  && (val_diff == 4 || val_diff == -4));

    28 +	}

    29 +

    30        return ((REGNO (reg0) == REGNO (reg1))

    31  	      && (val_diff == 4 || val_diff == -4));

    32      }
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