pru: Implement TARGET_CLASS_LIKELY_SPILLED_P to fix PR115013

Commit r15-436-g44e7855e did not fix PR115013 for PRU because
SMALL_REGISTER_CLASS_P is not returning an accurate value for the PRU
backend.

Word mode for PRU backend is defined as 8-bit, yet all ALU operations
are preferred in 32-bit mode.  Thus checking whether a register class
contains a single word_mode register would not classify the actually
single SImode register classes as small.  This affected the
multiplication source and destination register classes.

Fix by implementing TARGET_CLASS_LIKELY_SPILLED_P to treat all register
classes with SImode or smaller size as likely spilled.  This in turn
corrects the behaviour of SMALL_REGISTER_CLASS_P for PRU.

	PR rtl-optimization/115013

gcc/ChangeLog:

	* config/pru/pru.cc (pru_class_likely_spilled_p): Implement
	to mark classes containing one SImode register as likely
	spilled.
	(TARGET_CLASS_LIKELY_SPILLED_P): Define.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

0 files changed, 0 insertions, 0 deletions