This PR doesn't exactly trigger currently on trunk; a REG_DEAD note that
occurs in trunk, but not in the 4.5-based compilers which this bug was
reported for, currently blocks auto-inc-dec from doing its job, and just
happens to avoid this ICE.
The problem is vldmia/db, which do exist, are currently not enabled for
NEON struct modes (OI, XI, etc.) This only needs a small patch to
neon_struct_mem_operand() to work. Okay for trunk?
Thanks,
Chung-Lin
2011-03-31 Chung-Lin Tang <clt...@codesourcery.com>
* config/arm/arm.c (neon_struct_mem_operand):
Support POST_INC/PRE_DEC memory operands.
Index: config/arm/arm.c
===================================================================
--- config/arm/arm.c (revision 171769)
+++ config/arm/arm.c (working copy)
@@ -9124,6 +9124,11 @@
if (GET_CODE (ind) == REG)
return arm_address_register_rtx_p (ind, 0);
+ /* vldm/vstm allows POST_INC (ia) and PRE_DEC (db). */
+ if (GET_CODE (ind) == POST_INC
+ || GET_CODE (ind) == PRE_DEC)
+ return arm_address_register_rtx_p (XEXP (ind, 0), 0);
+
return FALSE;
}
