------- Comment #4 from paolo dot bonzini at lu dot unisi dot ch 2006-04-12
14:09 -------
Subject: Re: [4.2 Regression] gcc fails to build on sh64-elf
targets
> I think the best solution is to have an INDEX_REG_CLASS_FOR_MODE macro,
> which defaults to INDEX_REG_CLASS. Then this macro can be defined for the
> SH to return GENERAL_REGS for DImode when compiling SHmedia code.
>
Thanks for the analysis. I quickly tested that your approach works for
Kaz's testcase. However I don't feel confident enough to write this
patch though -- and even less to document it.
Are you going to do it, or should I go on and revert the regclass.c change?
This is what I tested BTW:
Index: reload.c
===================================================================
--- reload.c (revision 112658)
+++ reload.c (working copy)
@@ -5316,7 +5316,7 @@ find_reloads_address_1 (enum machine_mod
RTX_CODE code = GET_CODE (x);
if (context == 1)
- context_reg_class = INDEX_REG_CLASS;
+ context_reg_class = GET_MODE (x) == DImode ? GENERAL_REGS :
INDEX_REG_CLASS;
else
context_reg_class = base_reg_class (mode, outer_code, index_code);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27117
