On 02/04/14 10:45, nick clifton wrote:
Hi Jeff,
But how/why did an extended register get selected to begin with?
It happens in reload.c:find_valid_class().
HARD_REGNO_MODE_OK and other macros/hooks ought to be preventing this
relatively early.
Ah - and that is the problem. mn10300_hard_regno_mode_ok is allowing
extended registers to match some classes even in MN10300.
So how about the patch below ? This also allows the libstdc++-v3
library to be built.
Cheers
Nick
gcc/ChangeLog
2014-02-04 Nick Clifton <ni...@redhat.com>
* config/mn10300/mn10300.c (mn10300_hard_regno_mode_ok): Do not
accept extended registers in any mode when compiling for the
MN10300.
This is fine. I'm assuming that insn predicate checks prevent similar
situations from occurring with FP_REGS & FP_ACC_REGS. ie, patterns with
constraints which allow those registers are conditional on TARGET_AM33.
Jeff
