HSA: support for direct function call is introduced.

Hello.

Following patch introduces support for direct call instructions
for HSAIL.

Thanks,
Martin

gcc/c-family/ChangeLog:

2014-12-05  Martin Liska  <mliska@suse.cz>

	* c-common.c: New 'hsafunc' attribute is added.

gcc/ChangeLog:

2014-12-05  Martin Liska  <mliska@suse.cz>

	* hsa-brig.c (struct function_linkage_pair): New data structure.
	(hsa_brig_section::get_ptr_by_offset): New function.
	(emit_directive_variable): Linkage is retrieved by symbol.
	(emit_function_directives): Emitted function is added to map
	with offsets.
	(enqueue_op): New operand type handling added.
	(emit_code_ref_operand): Created from emit_label_operand.
	(emit_code_list_operand): New function.
	(emit_queued_operands): New operand type handling added.
	(emit_segment_insn): BRIG_KIND_INST_SEG is changed
	to BRIG_KIND_INST_SEG_CVT.
	(emit_cvt_insn): Undefined behavior fixed by wrong array bounds.
	(emit_arg_block): New function.
	(emit_call_insn): Likewise.
	(emit_call_block_insn): Likewise.
	(emit_insn): New instructions are handled.
	(hsa_output_brig): Function offsets for call instructions
	are resolved.
	* hsa-dump.c (static void indent_stream): New function.
	(dump_hsa_insn): Added support for call instruction.
	* hsa-gen.c (hsa_init_data_for_cfun): New flag for hsa_cfun is parsed.
	(hsa_deinit_data_for_cfun): New pools are deallocated.
	(get_symbol_for_decl): Symbol's linkage is set up.
	(hsa_get_spill_symbol): Likewise.
	(hsa_alloc_code_list_op): New function.
	(hsa_alloc_call_insn): Likewise.
	(hsa_alloc_call_block_insn): Likewise.
	(gen_hsa_addr_for_arg): Likewise.
	(gen_hsa_insns_for_direct_call): Likewise.
	(gen_hsa_insns_for_return): Likewise.
	(gen_hsa_insns_for_call): Likewise.
	(gen_hsa_insns_for_gimple_stmt): GIMPLE labels with non-taken address
	are supported.
	(gen_function_parameters): Linkage condition is introduced.
	(generate_hsa): kern_p flag is parsed.
	(wrap_hsa): Likewise.
	(pass_gen_hsail::execute): Likewise.
	(struct hsa_op_reg::verify): New function.
	* hsa.h (struct hsa_symbol): Linkage member is added.
	(struct hsa_op_code_ref): Created from existing hsa_op_label_ref.
	(struct hsa_op_code_list): New operand is added.
	(struct hsa_insn_call): New instruction.
	(struct hsa_insn_call_block): Likewise.
	(struct hsa_function_representation): kern_p attribute is introduced.
	(struct hsa_op_reg::verify): New function.
HSA: memory leaks are fixed.

Hello.

Attached patch removes all memory leaks which come from HSA-related
source files.

Thanks,
Martin

gcc/ChangeLog:

2014-12-05  Martin Liska  <mliska@suse.cz>

	* hsa-brig.c (brig_string_slot_hasher::remove): Memory free is added.
	* hsa-gen.c (hsa_deinit_data_for_cfun): Destructors are called for
	operands and instructions that need to deallocate a data.
	(hsa_alloc_reg_op): Object is added to list of items that are
	destructed.
	(hsa_alloc_code_list_op): Likewise.
	(hsa_alloc_call_insn): Likewise.
	(hsa_alloc_call_block_insn): Likewise.
	(wrap_hsa): Products of asprintf are freed.
	* hsa.h (struct hsa_op_reg): New destructor.
	(struct hsa_op_code_list): Likewise.
	(struct hsa_insn_call): Likewise.
	(struct hsa_insn_call_block): Likewise.
HSA: function comments are added.

Hello.

In this small patch I add missing comments.

Thanks,
Martin

    gcc/ChangeLog:

    2014-12-12  Martin Liska  <mliska@suse.cz>

        * hsa-brig.c: Function comments are added.
        * hsa-gen.c: Likewise.