or1k: Allow SImode for condition flag register

or1k: Allow SImode for condition flag register

Commit

eb2ea476db2 emit-rtl: Allow extra checks for paradoxical subregs [PR119966]

changed validate_subreg to return false on the paradoxical SImode subreg
of the OpenRISC condition flag register (reg:BI sr_f), which triggered

internal compiler error: in emit_move_multi_word, at expr.cc:4497

c0694f95f59 or1k: Fix ICE in libgcc caused by recent validate_subreg changes

changed or1k_can_change_mode_class to allow changing flags mode from BI
to SI.  But or1k_hard_regno_mode_ok still returns false for condition
flag register in SImode.  Update or1k_hard_regno_mode_ok to also allow
condition flag register in SImode.

Tested with or1k Linux cross compiler for or1k glibc build.

gcc/

	PR target/120587
	PR target/125155
	* config/or1k/or1k.cc (or1k_hard_regno_mode_ok): Allow condition
	condition flag register in SImode.

gcc/testsuite/

	PR target/120587
	PR target/125155
	* gcc.target/or1k/pr125155.c: New test.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>