1 // Copyright (c) 2016 Google Inc.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "source/opt/pass_manager.h"
16
17 #include <iostream>
18 #include <string>
19 #include <vector>
20
21 #include "source/opt/ir_context.h"
22 #include "source/util/timer.h"
23 #include "spirv-tools/libspirv.hpp"
24
25 namespace spvtools {
26
27 namespace opt {
28
Run(IRContext * context)29 Pass::Status PassManager::Run(IRContext* context) {
30 auto status = Pass::Status::SuccessWithoutChange;
31
32 // If print_all_stream_ is not null, prints the disassembly of the module
33 // to that stream, with the given preamble and optionally the pass name.
34 auto print_disassembly = [&context, this](const char* preamble, Pass* pass) {
35 if (print_all_stream_) {
36 std::vector<uint32_t> binary;
37 context->module()->ToBinary(&binary, false);
38 SpirvTools t(SPV_ENV_UNIVERSAL_1_2);
39 std::string disassembly;
40 t.Disassemble(binary, &disassembly, 0);
41 *print_all_stream_ << preamble << (pass ? pass->name() : "") << "\n"
42 << disassembly << std::endl;
43 }
44 };
45
46 SPIRV_TIMER_DESCRIPTION(time_report_stream_, /* measure_mem_usage = */ true);
47 for (auto& pass : passes_) {
48 print_disassembly("; IR before pass ", pass.get());
49 SPIRV_TIMER_SCOPED(time_report_stream_, (pass ? pass->name() : ""), true);
50 const auto one_status = pass->Run(context);
51 if (one_status == Pass::Status::Failure) return one_status;
52 if (one_status == Pass::Status::SuccessWithChange) status = one_status;
53
54 // Reset the pass to free any memory used by the pass.
55 pass.reset(nullptr);
56 }
57 print_disassembly("; IR after last pass", nullptr);
58
59 // Set the Id bound in the header in case a pass forgot to do so.
60 //
61 // TODO(dnovillo): This should be unnecessary and automatically maintained by
62 // the IRContext.
63 if (status == Pass::Status::SuccessWithChange) {
64 context->module()->SetIdBound(context->module()->ComputeIdBound());
65 }
66 passes_.clear();
67 return status;
68 }
69
70 } // namespace opt
71 } // namespace spvtools
72