1 /* Routines for emitting GIMPLE to a file stream.
3 Copyright (C) 2011-2014 Free Software Foundation, Inc.
4 Contributed by Diego Novillo <dnovillo@google.com>
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
24 #include "coretypes.h"
26 #include "basic-block.h"
27 #include "tree-ssa-alias.h"
28 #include "internal-fn.h"
30 #include "gimple-expr.h"
33 #include "gimple-iterator.h"
34 #include "gimple-ssa.h"
35 #include "data-streamer.h"
36 #include "gimple-streamer.h"
37 #include "lto-streamer.h"
38 #include "tree-streamer.h"
39 #include "value-prof.h"
41 /* Output PHI function PHI to the main stream in OB. */
44 output_phi (struct output_block
*ob
, gimple phi
)
46 unsigned i
, len
= gimple_phi_num_args (phi
);
48 streamer_write_record_start (ob
, lto_gimple_code_to_tag (GIMPLE_PHI
));
49 streamer_write_uhwi (ob
, SSA_NAME_VERSION (PHI_RESULT (phi
)));
51 for (i
= 0; i
< len
; i
++)
53 stream_write_tree (ob
, gimple_phi_arg_def (phi
, i
), true);
54 streamer_write_uhwi (ob
, gimple_phi_arg_edge (phi
, i
)->src
->index
);
55 bitpack_d bp
= bitpack_create (ob
->main_stream
);
56 stream_output_location (ob
, &bp
, gimple_phi_arg_location (phi
, i
));
57 streamer_write_bitpack (&bp
);
62 /* Emit statement STMT on the main stream of output block OB. */
65 output_gimple_stmt (struct output_block
*ob
, gimple stmt
)
68 enum gimple_code code
;
73 /* Emit identifying tag. */
74 code
= gimple_code (stmt
);
75 tag
= lto_gimple_code_to_tag (code
);
76 streamer_write_record_start (ob
, tag
);
78 /* Emit the tuple header. */
79 bp
= bitpack_create (ob
->main_stream
);
80 bp_pack_var_len_unsigned (&bp
, gimple_num_ops (stmt
));
81 bp_pack_value (&bp
, gimple_no_warning_p (stmt
), 1);
82 if (is_gimple_assign (stmt
))
83 bp_pack_value (&bp
, gimple_assign_nontemporal_move_p (stmt
), 1);
84 bp_pack_value (&bp
, gimple_has_volatile_ops (stmt
), 1);
85 hist
= gimple_histogram_value (cfun
, stmt
);
86 bp_pack_value (&bp
, hist
!= NULL
, 1);
87 bp_pack_var_len_unsigned (&bp
, stmt
->subcode
);
89 /* Emit location information for the statement. */
90 stream_output_location (ob
, &bp
, LOCATION_LOCUS (gimple_location (stmt
)));
91 streamer_write_bitpack (&bp
);
93 /* Emit the lexical block holding STMT. */
94 stream_write_tree (ob
, gimple_block (stmt
), true);
96 /* Emit the operands. */
97 switch (gimple_code (stmt
))
100 streamer_write_hwi (ob
, gimple_resx_region (stmt
));
103 case GIMPLE_EH_MUST_NOT_THROW
:
104 stream_write_tree (ob
,
105 gimple_eh_must_not_throw_fndecl (
106 as_a
<gimple_eh_must_not_throw
> (stmt
)),
110 case GIMPLE_EH_DISPATCH
:
111 streamer_write_hwi (ob
, gimple_eh_dispatch_region (stmt
));
116 gimple_asm asm_stmt
= as_a
<gimple_asm
> (stmt
);
117 streamer_write_uhwi (ob
, gimple_asm_ninputs (asm_stmt
));
118 streamer_write_uhwi (ob
, gimple_asm_noutputs (asm_stmt
));
119 streamer_write_uhwi (ob
, gimple_asm_nclobbers (asm_stmt
));
120 streamer_write_uhwi (ob
, gimple_asm_nlabels (asm_stmt
));
121 streamer_write_string (ob
, ob
->main_stream
,
122 gimple_asm_string (asm_stmt
), true);
134 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
136 tree op
= gimple_op (stmt
, i
);
138 /* Wrap all uses of non-automatic variables inside MEM_REFs
139 so that we do not have to deal with type mismatches on
140 merged symbols during IL read in. The first operand
141 of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */
142 if (op
&& (i
|| !is_gimple_debug (stmt
)))
145 if (TREE_CODE (*basep
) == ADDR_EXPR
)
146 basep
= &TREE_OPERAND (*basep
, 0);
147 while (handled_component_p (*basep
))
148 basep
= &TREE_OPERAND (*basep
, 0);
149 if (TREE_CODE (*basep
) == VAR_DECL
150 && !auto_var_in_fn_p (*basep
, current_function_decl
)
151 && !DECL_REGISTER (*basep
))
153 bool volatilep
= TREE_THIS_VOLATILE (*basep
);
154 tree ptrtype
= build_pointer_type (TREE_TYPE (*basep
));
155 *basep
= build2 (MEM_REF
, TREE_TYPE (*basep
),
156 build1 (ADDR_EXPR
, ptrtype
, *basep
),
157 build_int_cst (ptrtype
, 0));
158 TREE_THIS_VOLATILE (*basep
) = volatilep
;
163 stream_write_tree (ob
, op
, true);
164 /* Restore the original base if we wrapped it inside a MEM_REF. */
166 *basep
= TREE_OPERAND (TREE_OPERAND (*basep
, 0), 0);
168 if (is_gimple_call (stmt
))
170 if (gimple_call_internal_p (stmt
))
171 streamer_write_enum (ob
->main_stream
, internal_fn
,
172 IFN_LAST
, gimple_call_internal_fn (stmt
));
174 stream_write_tree (ob
, gimple_call_fntype (stmt
), true);
182 case GIMPLE_TRANSACTION
:
184 gimple_transaction trans_stmt
= as_a
<gimple_transaction
> (stmt
);
185 gcc_assert (gimple_transaction_body (trans_stmt
) == NULL
);
186 stream_write_tree (ob
, gimple_transaction_label (trans_stmt
), true);
194 stream_out_histogram_value (ob
, hist
);
198 /* Output a basic block BB to the main stream in OB for this FN. */
201 output_bb (struct output_block
*ob
, basic_block bb
, struct function
*fn
)
203 gimple_stmt_iterator bsi
= gsi_start_bb (bb
);
205 streamer_write_record_start (ob
,
206 (!gsi_end_p (bsi
)) || phi_nodes (bb
)
210 streamer_write_uhwi (ob
, bb
->index
);
211 streamer_write_gcov_count (ob
, bb
->count
);
212 streamer_write_hwi (ob
, bb
->frequency
);
213 streamer_write_hwi (ob
, bb
->flags
);
215 if (!gsi_end_p (bsi
) || phi_nodes (bb
))
217 /* Output the statements. The list of statements is terminated
219 for (bsi
= gsi_start_bb (bb
); !gsi_end_p (bsi
); gsi_next (&bsi
))
222 gimple stmt
= gsi_stmt (bsi
);
224 output_gimple_stmt (ob
, stmt
);
226 /* Emit the EH region holding STMT. */
227 region
= lookup_stmt_eh_lp_fn (fn
, stmt
);
230 streamer_write_record_start (ob
, LTO_eh_region
);
231 streamer_write_hwi (ob
, region
);
234 streamer_write_record_start (ob
, LTO_null
);
237 streamer_write_record_start (ob
, LTO_null
);
239 for (bsi
= gsi_start_phis (bb
); !gsi_end_p (bsi
); gsi_next (&bsi
))
241 gimple phi
= gsi_stmt (bsi
);
243 /* Only emit PHIs for gimple registers. PHI nodes for .MEM
244 will be filled in on reading when the SSA form is
246 if (!virtual_operand_p (gimple_phi_result (phi
)))
247 output_phi (ob
, phi
);
250 streamer_write_record_start (ob
, LTO_null
);