C99 testsuite readiness: More unverified testcase un-reductions

gcc/testsuite/

	* gcc.c-torture/compile/BUG17.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/BUG18.c (main): Likewise.  Call
	__builtin_printf instead of printf.
	* gcc.c-torture/compile/BUG21.c (Nase): Add missing void
	types.
	* gcc.c-torture/compile/BUG23.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/BUG5.c (bar): Call
	__builtin_printf instead of printf.
	* gcc.c-torture/compile/BUG6.c (main): Likewise.  Add missing
	int return type and missing void type.
	* gcc.c-torture/compile/b.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/b1.c (main): Likewise.  Call
	__builtin_printf instead of printf.
	* gcc.c-torture/compile/b88.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/bbb.c (flset): Add missing void
	return type and switch to prototype style.
	* gcc.c-torture/compile/bf.c (clr, atoi): Declare.
	(main): Add missing int return type.  Call
	__builtin_printf instead of printf.
	* gcc.c-torture/compile/bt.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/charmtst.c (foo, bar): Declare.
	(c_move_tst): Add missing int return type.
	* gcc.c-torture/compile/cmpdi-1.c (f, g): Add missing int
	return type.
	* gcc.c-torture/compile/cmphi.c (foo): Likewise.
	* gcc.c-torture/compile/conv.c (main): Likewise.  Add missing
	void type.  Call __builtin_printf instead of printf.
	* gcc.c-torture/compile/ddd.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/dilayout.c (str, ll): Add missing
	void return type.
	* gcc.c-torture/compile/dimove.c (foo): Likewise.
	* gcc.c-torture/compile/f2.c (foo): Likewise.
	* gcc.c-torture/compile/flatten.c  (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/fnul.c (main): Likewise.
	Call __builtin_printf instead of printf.
	* gcc.c-torture/compile/fq.c (expand_to_ascii): Add missing
	void return type.
	* gcc.c-torture/compile/funcptr-1.c (g): Call __builtin_printf
	instead of printf.
	(f): Likewise.  Add missing void types.
	* gcc.c-torture/compile/glob.c (foo): Add missing void types.
	* gcc.c-torture/compile/goto-1.c (f): Likewise.
	* gcc.c-torture/compile/i++.c (main): Call __builtin_printf
	instead of printf.
	* gcc.c-torture/compile/ic.c (foo): Add missing int return
	type.
	* gcc.c-torture/compile/iftrap-1.c (bar, baz): Declare.
	(f4, f6): Call __builtin_abort instead of abort.
	* gcc.c-torture/compile/iftrap-2.c (bar): Declare.
	* gcc.c-torture/compile/jmp.c (foo): Add missing int types.
	* gcc.c-torture/compile/labels-1.c (f): Add missing int
	return type and missing void type.  Call __builtin_abort
	instead of abort.
	* gcc.c-torture/compile/labels-2.c (f): Likewise.
	* gcc.c-torture/compile/lbug.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/memtst.c (memtst): Add missing void
	return type.
	(main): Add missing int	return type and missing void type.
	Call __builtin_bzero instead of bzero.
	* gcc.c-torture/compile/miscomp.c (main): Add missing int
	return type and missing void type.  Call __builtin_printf
	instead of printf.
	* gcc.c-torture/compile/msp.c (bar): Declare.
	(foo): Add missing void types.
	* gcc.c-torture/compile/mtst.c (foo): Add missing int return
	type.
	* gcc.c-torture/compile/packed-1.c (f): Add missing void
	types.
	* gcc.c-torture/compile/pr17119.c (func1, func2): Declare.
	* gcc.c-torture/compile/pr18712.c (foo, foo1): Declare.
	* gcc.c-torture/compile/pr20412.c (bar1, bar2, bar3): Declare.
	* gcc.c-torture/compile/pr21532.c (foo): Declare.
	* gcc.c-torture/compile/pr22398.c (main): Call __builtin_exit
	instead of exit.
	* gcc.c-torture/compile/pr24883.c (orec_str_list): Add missing
	void return type.
	* gcc.c-torture/compile/pr25311.c (use): Declare.
	* gcc.c-torture/compile/pr25514.c (foo): Declare.
	* gcc.c-torture/compile/pr26425.c (key_put): Declare.
	* gcc.c-torture/compile/pr27087.c (g): Declare.
	* gcc.c-torture/compile/pr27282.c (colrow_equal): Add missing
	int return type.
	* gcc.c-torture/compile/pr27907.c (fann_run): Add missing
	void return type.
	* gcc.c-torture/compile/pr28489.c (c_compile): Likewise.
	* gcc.c-torture/compile/pr28776-1.c
	(tree_contains_struct_check_failed): Declare.
	* gcc.c-torture/compile/pr29128.c (process_main): Add missing
	void return type.
	* gcc.c-torture/compile/pr29945.c (unget_char): Declare.
	(main) Add missing void return type.
	* gcc.c-torture/compile/pr33382.c (show_configuration): Add
	missing int types.
	* gcc.c-torture/compile/pr36141.c (ffi_prep_closure_loc): Add
	missing return type.
	* gcc.c-torture/compile/pr36988.c (__writel): Declare.
	* gcc.c-torture/compile/pr37026.c (foo): Declare.
	* gcc.c-torture/compile/pr37285.c (_bfd_abort): Declare.
	(_bfd_xcoff_canonicalize_dynamic_reloc): Add missing void
	return type.
	* gcc.c-torture/compile/pr38554.c (applyFunction): Add missing
	void return type.
	* gcc.c-torture/compile/pr42164.c (swp_offset, __BUG_ON):
	Declare.
	* gcc.c-torture/compile/pr44788.c (foo): Declare.
	* gcc.c-torture/compile/pr47364-1.c (arc4_init): Add missing
	void return type.
	* gcc.c-torture/compile/pr48596.c (_nrrdCenter): Declare.
	* gcc.c-torture/compile/rel.c (foo): Add missing int return
	type.
	* gcc.c-torture/compile/run.c (main): Likewise.  Add missing
	void type.
	* gcc.c-torture/compile/sar.c (main): Likewise.
	* gcc.c-torture/compile/selfrec.c (foo): Add missing int
	parameter type.
	* gcc.c-torture/compile/shloop.c (main): Add missing int
	return type and missing void type.
	* gcc.c-torture/compile/shm.c (foo): Add missing int return
	type.
	* gcc.c-torture/compile/sim.c (main): Likewise.  Add missing
	void type.
	* gcc.c-torture/compile/simd-5.c (main): Add missing int
	return type and missing void type.  Call __builtin_printf
	instead of printf.
	* gcc.c-torture/compile/sne.c (foo): Add missing int return
	type.
	* gcc.c-torture/compile/sound.c (write): Declare.
	(main): Add missing int return type and missing void type.
	* gcc.c-torture/compile/speed.c (main): Likewise.
	* gcc.c-torture/compile/store0.c (foo): Add missing void
	return type.
	* gcc.c-torture/compile/storecc.c (foo): Add missing int
	return type.
	* gcc.c-torture/compile/strcpy-1.c (rezero): Add missing
	void types.
	* gcc.c-torture/compile/stru.c (foo): Add missing void return
	type.
	* gcc.c-torture/compile/stuct.c (main): Add missing int return
	type and missing void type.
	* gcc.c-torture/compile/time.c (main): Likewise.
	* gcc.c-torture/compile/unalign-1.c (f): Declare.
	* gcc.c-torture/compile/v.c (main): Add missing int return
	type.
	* gcc.c-torture/compile/xcsebug.c (foo): Add missing void
	types.
	* gcc.c-torture/compile/xmtst.c (p2, p3, p4): Add missing
	int return type.
	* gcc.c-torture/compile/xz.c (foo): Add missing void return
	type.
	* gcc.c-torture/execute/loop-2f.c (f): Add missing void
	return type.
	(main): Return instead of calling exit.  Call __builtin_abort
	instead of abort.
	* gcc.c-torture/execute/loop-2g.c (f): Add missing void
	return type.
	(main): Return instead of calling exit.  Call __builtin_abort
	instead of abort.
	* gcc.dg/20020206-1.c: Build without -w.
	(main): Call __builtin_abort instead of abort and
	__builtin_exit instead of exit.
	* gcc.dg/ipa/20040703-wpa.c (main): Call __builtin_abort
	instead of abort and __builtin_exit instead of exit.
	* gcc.dg/torture/pr84528.c (main): Add missing int and void
	types.  Call __builtin_abort instead of abort, and
	__builtin_exit instead of exit.
	* gcc.dg/tree-ssa/pr68619-2.c (vector_type_mode, real_inf):
	Declare.
	* gcc.dg/tree-ssa/pr68619-3.c (iterative_hash): Declare.
	(e_hash): Call __builtin_abort instead of abort.
	* gcc.dg/tree-ssa/pr68619-4.c (rhs_regno, foop, arf): Declare.
	* gcc.dg/tree-ssa/pr68619-5.c (invert_tree_comparison)
	(vector_type_mode): Declare.
	* gcc.dg/tree-ssa/pr69270-2.c (arf, gimple_debug_bind_p)
	(gimple_bb, gimple_assign_rhs_to_tree)
	(is_gimple_min_invariant, unshare_expr): Declare.
	* gcc.dg/tree-ssa/pr69270-3.c: (end_imm_use_stmt_p)
	(next_imm_use_stmt, arf, boo, update_stmt): Declare.
	* gcc.dg/tree-ssa/ranger-threader-2.c (gimple_call_arg):
	Declare.
	(gimple_op): Call __builtin_abort instead of abort.
	* gcc.dg/tree-ssa/ranger-threader-3.c (expand_binop): Declare.
	* gcc.dg/tree-ssa/ssa-dom-branch-1.c (arf, foo): Declare.
	(try_combine): Add casts to rtx.
	* gcc.dg/tree-ssa/split-path-3.c (vec_heap_o_reserve)
	(VEC_int_base_length, bmp_iter_and_compl_init)
	(bmp_iter_and_compl, bmp_iter_next, VEC_int_heap_free):
	Declare.
	* gcc.dg/tree-ssa/split-path-7.c (linit): Call
	__builtin_strcmp instead of strcmp.
	* gcc.dg/tree-ssa/ssa-dom-thread-12.c (gimple_call_arg):
	Declare.
	(gimple_op): Call __builtin_abort instead of abort.
	* gcc.dg/tree-ssa/ssa-dom-thread-13.c (arf, error): Declare.
	(convert): Call __builtin_abort instead of abort.
	* gcc.dg/tree-ssa/ssa-dom-thread-14.c (exand_binop): Declare.
	* gcc.dg/tree-ssa/ssa-dom-thread-15.c
	(ix86_target_stack_probe, pro_epilogue_adjust_stack)
	(gen_rtx_CONST_INT, fancy_abort): Declare.
	* gcc.dg/tree-ssa/ssa-dse-25.c (foo): Call __builtin_memset
	instead of memset.
	* gcc.target/aarch64/aapcs64/va_arg-17.c
	(init_data): Call __builtin_memset instead of memset.
	* gcc.target/i386/pr69030.c (fn1): Call __builtin_printf instead
	of printf.