1 /* Routines for emitting GIMPLE to a file stream.
3 Copyright (C) 2011-2015 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"
29 #include "hard-reg-set.h"
31 #include "fold-const.h"
32 #include "internal-fn.h"
34 #include "gimple-iterator.h"
35 #include "gimple-ssa.h"
37 #include "data-streamer.h"
38 #include "gimple-streamer.h"
39 #include "lto-streamer.h"
40 #include "tree-streamer.h"
41 #include "value-prof.h"
43 /* Output PHI function PHI to the main stream in OB. */
46 output_phi (struct output_block
*ob
, gphi
*phi
)
48 unsigned i
, len
= gimple_phi_num_args (phi
);
50 streamer_write_record_start (ob
, lto_gimple_code_to_tag (GIMPLE_PHI
));
51 streamer_write_uhwi (ob
, SSA_NAME_VERSION (PHI_RESULT (phi
)));
53 for (i
= 0; i
< len
; i
++)
55 stream_write_tree (ob
, gimple_phi_arg_def (phi
, i
), true);
56 streamer_write_uhwi (ob
, gimple_phi_arg_edge (phi
, i
)->src
->index
);
57 bitpack_d bp
= bitpack_create (ob
->main_stream
);
58 stream_output_location (ob
, &bp
, gimple_phi_arg_location (phi
, i
));
59 streamer_write_bitpack (&bp
);
64 /* Emit statement STMT on the main stream of output block OB. */
67 output_gimple_stmt (struct output_block
*ob
, gimple stmt
)
70 enum gimple_code code
;
75 /* Emit identifying tag. */
76 code
= gimple_code (stmt
);
77 tag
= lto_gimple_code_to_tag (code
);
78 streamer_write_record_start (ob
, tag
);
80 /* Emit the tuple header. */
81 bp
= bitpack_create (ob
->main_stream
);
82 bp_pack_var_len_unsigned (&bp
, gimple_num_ops (stmt
));
83 bp_pack_value (&bp
, gimple_no_warning_p (stmt
), 1);
84 if (is_gimple_assign (stmt
))
86 gimple_assign_nontemporal_move_p (
87 as_a
<gassign
*> (stmt
)),
89 bp_pack_value (&bp
, gimple_has_volatile_ops (stmt
), 1);
90 hist
= gimple_histogram_value (cfun
, stmt
);
91 bp_pack_value (&bp
, hist
!= NULL
, 1);
92 bp_pack_var_len_unsigned (&bp
, stmt
->subcode
);
94 /* Emit location information for the statement. */
95 stream_output_location (ob
, &bp
, LOCATION_LOCUS (gimple_location (stmt
)));
96 streamer_write_bitpack (&bp
);
98 /* Emit the lexical block holding STMT. */
99 stream_write_tree (ob
, gimple_block (stmt
), true);
101 /* Emit the operands. */
102 switch (gimple_code (stmt
))
105 streamer_write_hwi (ob
, gimple_resx_region (as_a
<gresx
*> (stmt
)));
108 case GIMPLE_EH_MUST_NOT_THROW
:
109 stream_write_tree (ob
,
110 gimple_eh_must_not_throw_fndecl (
111 as_a
<geh_mnt
*> (stmt
)),
115 case GIMPLE_EH_DISPATCH
:
116 streamer_write_hwi (ob
,
117 gimple_eh_dispatch_region (
118 as_a
<geh_dispatch
*> (stmt
)));
123 gasm
*asm_stmt
= as_a
<gasm
*> (stmt
);
124 streamer_write_uhwi (ob
, gimple_asm_ninputs (asm_stmt
));
125 streamer_write_uhwi (ob
, gimple_asm_noutputs (asm_stmt
));
126 streamer_write_uhwi (ob
, gimple_asm_nclobbers (asm_stmt
));
127 streamer_write_uhwi (ob
, gimple_asm_nlabels (asm_stmt
));
128 streamer_write_string (ob
, ob
->main_stream
,
129 gimple_asm_string (asm_stmt
), true);
141 for (i
= 0; i
< gimple_num_ops (stmt
); i
++)
143 tree op
= gimple_op (stmt
, i
);
145 /* Wrap all uses of non-automatic variables inside MEM_REFs
146 so that we do not have to deal with type mismatches on
147 merged symbols during IL read in. The first operand
148 of GIMPLE_DEBUG must be a decl, not MEM_REF, though. */
149 if (op
&& (i
|| !is_gimple_debug (stmt
)))
152 if (TREE_CODE (*basep
) == ADDR_EXPR
)
153 basep
= &TREE_OPERAND (*basep
, 0);
154 while (handled_component_p (*basep
))
155 basep
= &TREE_OPERAND (*basep
, 0);
156 if (TREE_CODE (*basep
) == VAR_DECL
157 && !auto_var_in_fn_p (*basep
, current_function_decl
)
158 && !DECL_REGISTER (*basep
))
160 bool volatilep
= TREE_THIS_VOLATILE (*basep
);
161 tree ptrtype
= build_pointer_type (TREE_TYPE (*basep
));
162 *basep
= build2 (MEM_REF
, TREE_TYPE (*basep
),
163 build1 (ADDR_EXPR
, ptrtype
, *basep
),
164 build_int_cst (ptrtype
, 0));
165 TREE_THIS_VOLATILE (*basep
) = volatilep
;
170 stream_write_tree (ob
, op
, true);
171 /* Restore the original base if we wrapped it inside a MEM_REF. */
173 *basep
= TREE_OPERAND (TREE_OPERAND (*basep
, 0), 0);
175 if (is_gimple_call (stmt
))
177 if (gimple_call_internal_p (stmt
))
178 streamer_write_enum (ob
->main_stream
, internal_fn
,
179 IFN_LAST
, gimple_call_internal_fn (stmt
));
181 stream_write_tree (ob
, gimple_call_fntype (stmt
), true);
189 case GIMPLE_TRANSACTION
:
191 gtransaction
*trans_stmt
= as_a
<gtransaction
*> (stmt
);
192 gcc_assert (gimple_transaction_body (trans_stmt
) == NULL
);
193 stream_write_tree (ob
, gimple_transaction_label (trans_stmt
), true);
201 stream_out_histogram_value (ob
, hist
);
205 /* Output a basic block BB to the main stream in OB for this FN. */
208 output_bb (struct output_block
*ob
, basic_block bb
, struct function
*fn
)
210 gimple_stmt_iterator bsi
= gsi_start_bb (bb
);
212 streamer_write_record_start (ob
,
213 (!gsi_end_p (bsi
)) || phi_nodes (bb
)
217 streamer_write_uhwi (ob
, bb
->index
);
218 streamer_write_gcov_count (ob
, bb
->count
);
219 streamer_write_hwi (ob
, bb
->frequency
);
220 streamer_write_hwi (ob
, bb
->flags
);
222 if (!gsi_end_p (bsi
) || phi_nodes (bb
))
224 /* Output the statements. The list of statements is terminated
226 for (bsi
= gsi_start_bb (bb
); !gsi_end_p (bsi
); gsi_next (&bsi
))
229 gimple stmt
= gsi_stmt (bsi
);
231 output_gimple_stmt (ob
, stmt
);
233 /* Emit the EH region holding STMT. */
234 region
= lookup_stmt_eh_lp_fn (fn
, stmt
);
237 streamer_write_record_start (ob
, LTO_eh_region
);
238 streamer_write_hwi (ob
, region
);
241 streamer_write_record_start (ob
, LTO_null
);
244 streamer_write_record_start (ob
, LTO_null
);
246 for (gphi_iterator psi
= gsi_start_phis (bb
);
250 gphi
*phi
= psi
.phi ();
252 /* Only emit PHIs for gimple registers. PHI nodes for .MEM
253 will be filled in on reading when the SSA form is
255 if (!virtual_operand_p (gimple_phi_result (phi
)))
256 output_phi (ob
, phi
);
259 streamer_write_record_start (ob
, LTO_null
);