re PR target/34981 (Lazily-bound function called twice)

re PR target/34981 (Lazily-bound function called twice)

gcc/
	PR target/34981
	* config/mips/mips-protos.h (mips_expand_call): Return an rtx.
	(build_mips16_call_stub): Likewise.
	* config/mips/mips.h (FIRST_PSEUDO_REGISTER): Rename FAKE_CALL_REGNO
	to GOT_VERSION_REGNUM.
	(CALL_REALLY_USED_REGISTERS): Set the GOT_VERSION_REGNUM entry to 0.
	(EPILOGUE_USES): Include GOT_VERSION_REGNUM if TARGET_ABICALLS.
	* config/mips/mips.c (mips_emit_call_insn): New function.
	(mips_call_tls_get_addr): Call mips_expand_call directly.
	(mips_expand_call): Update the call to build_mips16_call_stub
	and remove a redundant condition.  Assert that MIPS16 stubs do not
	use lazy binding.  Use mips_emit_call_insn and return the call insn.
	(override_options): Allow SImode for GOT_VERSION_REGNUM.
	(build_mips16_call_stub): Use mips_emit_call_insn rather than
	emit_call_insn.  Return the call insn or null.
	(mips_avoid_hazard): Remove hazard_set handling.
	(mips_extra_live_on_entry): Include GOT_VERSION_REGNUM if
	TARGET_ABICALLS.
	* config/mips/mips.md (UNSPEC_EH_RECEIVER): Rename to...
	(UNSPEC_RESTORE_GP): ...this.
	(UNSPEC_SET_GOT_VERSION, UNSPEC_UPDATE_GOT_VERSION): New constants.
	(FAKE_CALL_REGNO): Rename to...
	(GOT_VERSION_REGNUM): ...this.
	(type): Add "ghost" value.  Add an associated insn reservation.
	(hazard_set): Remove.
	(exception_receiver): Rename to...
	(restore_gp): ...this and update the unspec identifier accordingly.
	(exception_receiver, nonlocal_got_receiver): New expanders.
	(load_call<mode>): Use GOT_VERSION_REGNUM.  Don't set
	FAKE_CALL_REGNO.  Remove hazard_set attribute.
	(set_got_version, update_got_version): New patterns.

gcc/testsuite/
	PR target/34981
	* gcc.target/mips/lazy-binding-1.c: New test.
	* gcc.target/mips/mips.exp (setup_mips_tests): Set mips_abi,
	mips_forced_gp, mips_forced_no_abicalls, mips_forced_no_shared
	and mips_forced_no_er.
	(dg-mips-options): Avoid using -mips16 -mhard-float for ABIs
	other than o32 and o64.  Avoid using -mabicalls with an implicit
	-mabi=eabi.  Avoid using small data with -mabicalls.  Skip
	-mabi=*, -G*, -mabicalls, -mshared and -mexplicit-relocs tests
	if the multilib forces the an incompatible option.

From-SVN: r132067