The cris ports are unable to build newlib due to a reload failure.
What happens is we need to reload an auto-inc memory reference. The
preferred class is GENERAL_REGS. THe register we happen to select is
ACR, but ACR can not be used in an auto-inc addressing mode.
This can be easily fixed by returning GENNONACR_REGS from the preferred
reload class hook instead of GENERAL_REGS.
It may be advisable to also define the LIMIT_RELOAD_CLASS hook. I
haven't done that, but the port maintainers should seriously consider it.
With this change cris and crisv32 both build newlib successfully.
Installed on the trunk.
Jeff
diff --git a/gcc/config/cris/cris.c b/gcc/config/cris/cris.c
index 21137bd..8c134a6 100644
--- a/gcc/config/cris/cris.c
+++ b/gcc/config/cris/cris.c
@@ -1597,7 +1597,7 @@ cris_preferred_reload_class (rtx x ATTRIBUTE_UNUSED,
reg_class_t rclass)
&& rclass != SRP_REGS
&& rclass != CC0_REGS
&& rclass != SPECIAL_REGS)
- return GENERAL_REGS;
+ return GENNONACR_REGS;
return rclass;
}
