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patches/gcc/3.4.6/160-arm-ldm-peephole2.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Thu Jun 11 21:47:19 2009 +0000 (2009-06-11)
branch1.4
changeset 1451 25d050084e98
parent 746 b150d6f590fc
permissions -rw-r--r--
populate: fix installing dynamic linker 'ld.so'

The dynamic linker, ld.so, needs the execute bit to be set.
Detect tht the library being installed is in fact ld.so and
install it with 0755 instead of 0644.

Fix detecting src == dst.

Use a simpler command to copy src -> dst.

Also change echo to printf, get rid of 'echo -n', which is
highly non-portable.


-------- diffstat follows --------
/trunk/scripts/populate.in | 76 43 33 0 +++++++++++++++++++++++++++++-----------------------
1 file changed, 43 insertions(+), 33 deletions(-)
(transplanted from d7ddcb75e0f703e2ba6d17169167356389224870) 
     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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