re PR c++/5964 (g++ generates code that results in "word displacement will not fit...

re PR c++/5964 (g++ generates code that results in "word displacement will not fit in 16 bits" on sparcv9)

	PR c++/5964
	* config/sparc/sparc.md (empty_delay_slot, branch_type): New
	attributes.
	(length): Compute variable length for branches/calls/jumps here.
	(branch, inverted_branch, normal_fp_branch, inverted_fp_branch,
	normal_fpe_branch, inverted_fpe_branch): Remove length attribute,
	define branch_type attribute.
	(divsi3_sp32): Maximum length is 6 not 7.
	(call_address_struct_value_sp32, call_symbolic_struct_value_sp32,
	call_address_untyped_struct_value_sp32,
	call_symbolic_untyped_struct_value_sp32): Set length to 3 not 2.
	* config/sparc/sparc.c (empty_delay_slot): New function.
	* config/sparc/sparc.h (ADJUST_INSN_LENGTH): Remove.
	* config/sparc/sparc-protos.h (empty_delay_slot): Add prototype.

	* g++.dg/opt/longbranch1.C: New test.

From-SVN: r51557