Mercurialcrosstool-ng / file revision
summary | shortlog | changelog | graph | tags | branches | files | changeset | file | latest | revisions | annotate | diff | raw | help
patches/gcc/3.4.4/601-gcc34-arm-ldm-peephole2.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue May 08 17:48:32 2007 +0000 (2007-05-08)
changeset 78 c3868084d81a
permissions -rw-r--r--
Huge fixes to glibc build, so that we can build at least (and at last):
- use ports addon even when installing headers,
- use optimisation (-O) when installing headers, to avoid unnecessary warnings (thanks Robert P. J. DAY for pointing this out!),
- lowest kernel version to use is only X.Y.Z, not X.Y.Z.T,
- a bit of preparations for NPTL (RSN I hope),
- fix fixing the linker scripts (changing the backup file is kind of useless and stupid);

Shut uClibc finish step: there really is nothing to do;

Add a patch for glibc-2.3.6 weak aliases handling on some archs (ARM and ALPHA at least);

Did not catch the make errors: fixed the pattern matching in scripts/functions;

Introduce a new log level, ALL:
- send components' build messages there,
- DEBUG log level is destined only for crosstool-NG debug messages,
- migrate sub-actions to use appropriate log levels;

Update the armeb-unknown-linux-gnu sample:
- it builds!
- uses gcc-4.0.4 and glibc-2.3.6,
- updated to latest config options set. 
     1 The 30_all_gcc34-arm-ldm-peephole.patch from Debian was conflicting 

     2 with the newer 36_all_pr16201-fix.patch, so i cut out the hunk from 

     3 it that was causing problems and grabbed an updated version from 

     4 upstream cvs.

     5 

     6 Index: gcc/config/arm/arm.c

     7 ===================================================================

     8 RCS file: /cvsroot/gcc/gcc/gcc/config/arm/arm.c,v

     9 retrieving revision 1.432

    10 retrieving revision 1.433

    11 diff -u -r1.432 -r1.433

    12 --- gcc-3.4.4/gcc/config/arm/arm.c	29 Mar 2005 03:00:23 -0000	1.432

    13 +++ gcc-3.4.4/gcc/config/arm/arm.c	1 Apr 2005 11:02:22 -0000	1.433

    14 @@ -5139,6 +5139,10 @@

    15  int

    16  adjacent_mem_locations (rtx a, rtx b)

    17  {

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

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

    20 +    return 0;

    21 +

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

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

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

    25 @@ -5178,6 +5182,17 @@

    26  	return 0;

    27  

    28        val_diff = val1 - val0;

    29 +

    30 +      if (arm_ld_sched)

    31 +	{

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

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

    34 +	     we are optimizing for size.  */

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

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

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

    38 +	}

    39 +

    40        return ((REGNO (reg0) == REGNO (reg1))

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

    42      }
crosstool-ng