1 /*
2 * Copyright © 2021 Valve Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 */
24
25 #include "aco_ir.h"
26
27 #include <vector>
28
29 namespace aco {
30 namespace {
31
32 struct idx_ctx {
33 std::vector<RegClass> temp_rc = {s1};
34 std::vector<uint32_t> renames;
35 };
36
37 inline void
reindex_defs(idx_ctx & ctx,aco_ptr<Instruction> & instr)38 reindex_defs(idx_ctx& ctx, aco_ptr<Instruction>& instr)
39 {
40 for (Definition& def : instr->definitions) {
41 if (!def.isTemp())
42 continue;
43 uint32_t new_id = ctx.temp_rc.size();
44 RegClass rc = def.regClass();
45 ctx.renames[def.tempId()] = new_id;
46 ctx.temp_rc.emplace_back(rc);
47 def.setTemp(Temp(new_id, rc));
48 }
49 }
50
51 inline void
reindex_ops(idx_ctx & ctx,aco_ptr<Instruction> & instr)52 reindex_ops(idx_ctx& ctx, aco_ptr<Instruction>& instr)
53 {
54 for (Operand& op : instr->operands) {
55 if (!op.isTemp())
56 continue;
57 uint32_t new_id = ctx.renames[op.tempId()];
58 assert(op.regClass() == ctx.temp_rc[new_id]);
59 op.setTemp(Temp(new_id, op.regClass()));
60 }
61 }
62
63 void
reindex_program(idx_ctx & ctx,Program * program)64 reindex_program(idx_ctx& ctx, Program* program)
65 {
66 ctx.renames.resize(program->peekAllocationId());
67
68 for (Block& block : program->blocks) {
69 auto it = block.instructions.begin();
70 /* for phis, only reindex the definitions */
71 while (is_phi(*it)) {
72 reindex_defs(ctx, *it++);
73 }
74 /* reindex all other instructions */
75 while (it != block.instructions.end()) {
76 reindex_defs(ctx, *it);
77 reindex_ops(ctx, *it);
78 ++it;
79 }
80 }
81 /* update the phi operands */
82 for (Block& block : program->blocks) {
83 auto it = block.instructions.begin();
84 while (is_phi(*it)) {
85 reindex_ops(ctx, *it++);
86 }
87 }
88
89 /* update program members */
90 program->private_segment_buffer = Temp(ctx.renames[program->private_segment_buffer.id()],
91 program->private_segment_buffer.regClass());
92 program->scratch_offset =
93 Temp(ctx.renames[program->scratch_offset.id()], program->scratch_offset.regClass());
94 program->temp_rc = ctx.temp_rc;
95 }
96
97 void
update_live_out(idx_ctx & ctx,std::vector<IDSet> & live_out)98 update_live_out(idx_ctx& ctx, std::vector<IDSet>& live_out)
99 {
100 for (IDSet& set : live_out) {
101 IDSet new_set;
102 for (uint32_t id : set)
103 new_set.insert(ctx.renames[id]);
104 set = new_set;
105 }
106 }
107
108 } /* end namespace */
109
110 void
reindex_ssa(Program * program)111 reindex_ssa(Program* program)
112 {
113 idx_ctx ctx;
114 reindex_program(ctx, program);
115
116 program->allocationID = program->temp_rc.size();
117 }
118
119 void
reindex_ssa(Program * program,std::vector<IDSet> & live_out)120 reindex_ssa(Program* program, std::vector<IDSet>& live_out)
121 {
122 idx_ctx ctx;
123 reindex_program(ctx, program);
124 update_live_out(ctx, live_out);
125
126 program->allocationID = program->temp_rc.size();
127 }
128
129 } // namespace aco
130