patches/gcc/3.4.6/160-arm-ldm-peephole2.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Thu Oct 09 19:17:49 2008 +0000 (2008-10-09)
changeset 914 0b164a321177
parent 746 b150d6f590fc
permissions -rw-r--r--
Remove CT_BROKEN.
Only one component is actually BROKEN (libelf), make it depend on EXPERIMENTAL, but state BROKEN in the prompt.
ltrace (which depends on libelf) is now marked as EXPERIMENTAL, with the reference to the BROKEN libelf in the help entry.

/trunk/docs/overview.txt | 6 0 6 0 ------
/trunk/config/debug/ltrace.in | 7 4 3 0 ++++---
/trunk/config/global/ct-behave.in | 8 0 8 0 --------
/trunk/config/tools/libelf.in | 5 3 2 0 +++--
4 files changed, 7 insertions(+), 19 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      }