Hi,
this is the ICE at -O2 on ACATS c34005a introduced on the 4.6 branch by
Martin's latest SRA patch. But it's actually the same PRE issue as:
http://gcc.gnu.org/ml/gcc-patches/2011-03/msg02210.html
Bootstrapped/regtested on i586-suse-linux, OK for 4.6 branch?
2011-07-14 Eric Botcazou <ebotca...@adacore.com>
PR tree-optimization/49725
Backport from mainline
2011-03-31 Eric Botcazou <ebotca...@adacore.com>
* tree-ssa-pre.c (create_component_ref_by_pieces_1) <ARRAY_REF>: Drop
a zero minimum index only if it is redundant
--
Eric Botcazou
Index: tree-ssa-pre.c
===================================================================
--- tree-ssa-pre.c (revision 176264)
+++ tree-ssa-pre.c (working copy)
@@ -2874,8 +2874,11 @@ create_component_ref_by_pieces_1 (basic_
return NULL_TREE;
if (genop2)
{
- /* Drop zero minimum index. */
- if (tree_int_cst_equal (genop2, integer_zero_node))
+ tree domain_type = TYPE_DOMAIN (TREE_TYPE (genop0));
+ /* Drop zero minimum index if redundant. */
+ if (integer_zerop (genop2)
+ && (!domain_type
+ || integer_zerop (TYPE_MIN_VALUE (domain_type))))
genop2 = NULL_TREE;
else
{
