------- Comment #3 from sje at cup dot hp dot com 2010-07-06 16:44 -------
The neccessary UNSPEC seems to be there if you trace the instructions back
far enough. I tried it on my test case and it worked. I am now testing the
patch on ToT to see if I can bootstrap. I also have to turn off partial
inlining to get bootstrap to work on ia64-hp-hpux11.23. I tweaked the patch
for ToT there are a bunch of changes to expr.c including setting base so the
patch I am currently testing with r161861 looks like this:
Index: expr.c
===================================================================
--- expr.c (revision 161861)
+++ expr.c (working copy)
@@ -8777,13 +8777,11 @@ expand_expr_real_1 (tree exp, rtx target
base = build2 (BIT_AND_EXPR, TREE_TYPE (base),
gimple_assign_rhs1 (def_stmt),
gimple_assign_rhs2 (def_stmt));
- op0 = expand_expr (base, NULL_RTX, address_mode, EXPAND_NORMAL);
if (!integer_zerop (TREE_OPERAND (exp, 1)))
- {
- rtx off;
- off = immed_double_int_const (mem_ref_offset (exp), address_mode);
- op0 = simplify_gen_binary (PLUS, address_mode, op0, off);
- }
+ base = build2 (POINTER_PLUS_EXPR, TREE_TYPE (base),
+ base, double_int_to_tree (sizetype,
+ mem_ref_offset (exp)));
+ op0 = expand_expr (base, NULL_RTX, address_mode, EXPAND_SUM);
op0 = memory_address_addr_space (mode, op0, as);
temp = gen_rtx_MEM (mode, op0);
set_mem_attributes (temp, exp, 0);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44790
