* tree-ssa-pre.c (my_rev_post_order_compute): Remove set but not
	used count variable.
	* genemit.c (gen_expand, gen_split): Avoid set but not used warnings
	when operandN variables aren't used in the body of the expander
	or splitter.
	* tree-outof-ssa.c (FOR_EACH_ELIM_GRAPH_SUCC,
	FOR_EACH_ELIM_GRAPH_PRED): Avoid set but not used warnings.
	* tree-ssa-operands.h (FOR_EACH_SSA_TREE_OPERAND): Likewise.
	* tree-flow.h (FOR_EACH_IMM_USE_FAST, FOR_EACH_IMM_USE_STMT,
	FOR_EACH_IMM_USE_ON_STMT): Likewise.
	* tree.h (FOR_EACH_CONSTRUCTOR_ELT): Likewise.
	* tree.c (PROCESS_ARG): Likewise.
fortran/
	* parse.c (parse_derived, parse_enum): Avoid set but not used
	warning.
java/
	* expr.c (process_jvm_instruction): Avoid set but not used warning.
	* builtins.c (compareAndSwapInt_builtin, compareAndSwapLong_builtin,
	getVolatile_builtin): Likewise.
libjava/
	* exception.cc (_Jv_Throw): Avoid set but not used warning.
	* include/java-assert.h (JvAssertMessage, JvAssert): Use argument in
	sizeof to avoid set but not used warnings.
libjava/classpath/
	* native/jni/midi-alsa/gnu_javax_sound_midi_alsa_AlsaPortDevice.c
	(Java_gnu_javax_sound_midi_alsa_AlsaPortDevice_run_1receiver_1thread_1):
	Avoid set but not used warning.
libiberty/
	* regex.c (byte_re_match_2_internal): Avoid set but not used
	warning.
gcc/testsuite/
	* gcc.dg/builtin-choose-expr.c: Avoid set but not used warnings.
	* gcc.dg/trunc-1.c: Likewise.
	* gcc.dg/vla-9.c: Likewise.
	* gcc.dg/dfp/composite-type.c: Likewise.
libffi/
	* testsuite/libffi.call/err_bad_abi.c: Remove unused args variable.

From-SVN: r158084