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patches/gcc/4.3.0/270-pr35982.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sat Jan 31 17:49:27 2009 +0000 (2009-01-31)
changeset 1183 268544004e77
parent 746 b150d6f590fc
permissions -rw-r--r--
On 20090131.1659+0100, Vincent Sanders <vince@kyllikki.org> wrote:
[This]patch is a bit more involved. The patch addresses a gcc
regression in the 4.3 series (specifically this patch is against 4.3.2
which does *not* have a lot of other issues which affect kernel building)

GCC bug tracker has this issue as
#38453 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38453
#32044 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32044

comment 65 of #32044 has the fix being applied to gcc trunk as revision #142719

The attached patch is a backport to gcc 4.3.2 which allows this
version to be used to generate correct output for various ARM kernel
build (and indeed is teh correct answer in general).

/trunk/patches/gcc/4.3.2/360-fix-expensive-optimize.patch | 207 207 0 0 +++++++++++++++++++++
1 file changed, 207 insertions(+) 
     1 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.0/gentoo/65_all_gcc43-pr35982.patch

     2 http://gcc.gnu.org/PR35982

     3 

     4 2008-04-23  Ira Rosen  <irar@il.ibm.com>

     5 

     6 	PR tree-optimization/35982

     7 	* tree-vect-analyze.c (vect_check_interleaving): Check that the

     8 	interleaved data-refs are of the same type.

     9 

    10 diff -durN gcc-4.3.0.orig/gcc/tree-vect-analyze.c gcc-4.3.0/gcc/tree-vect-analyze.c

    11 --- gcc-4.3.0.orig/gcc/tree-vect-analyze.c	2007-12-06 17:18:55.000000000 +0100

    12 +++ gcc-4.3.0/gcc/tree-vect-analyze.c	2008-06-10 14:45:17.000000000 +0200

    13 @@ -1081,7 +1081,9 @@

    14    type_size_b = TREE_INT_CST_LOW (TYPE_SIZE_UNIT (TREE_TYPE (DR_REF (drb))));

    15  

    16    if (type_size_a != type_size_b

    17 -      || tree_int_cst_compare (DR_STEP (dra), DR_STEP (drb)))

    18 +      || tree_int_cst_compare (DR_STEP (dra), DR_STEP (drb))

    19 +      || !types_compatible_p (TREE_TYPE (DR_REF (dra)), 

    20 +                              TREE_TYPE (DR_REF (drb))))

    21      return;

    22  

    23    init_a = TREE_INT_CST_LOW (DR_INIT (dra));
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