re PR target/35802 (MIPS64: Unable to find a register to spill in class ‘V1_REG...

re PR target/35802 (MIPS64: Unable to find a register to spill in class ‘V1_REG’)

gcc/
	PR target/35802
	* config/mips/mips.h (reg_class): Remove V1_REG.
	(REG_CLASS_NAMES, REG_CLASS_CONTENTS): Update accordingly.
	* config/mips/mips.c (mips_regno_to_class): Map $3 to M16_NA_REGS
	instead of V1_REGS.
	(mips_get_tp): New function.
	(mips_legitimize_tls_address): Use it.
	* config/mips/constraints.md (v): Delete.
	* config/mips/mips.md (TLS_GET_TP_REGNUM): New constant.
	(tls_get_tp_<mode>): Allow any GPR destination and clobber $3.
	After reload, split into a move and ...
	(*tls_get_tp_<mode>_split): ...this new instruction.

gcc/testsuite/
	PR target/35802
	* gcc.target/mips/pr35802.c: New test.

From-SVN: r137670