1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
// Copyright (c) 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_OPT_SIMPLIFICATION_PASS_H_
#define SOURCE_OPT_SIMPLIFICATION_PASS_H_
#include "source/opt/function.h"
#include "source/opt/ir_context.h"
#include "source/opt/pass.h"
namespace spvtools {
namespace opt {
// See optimizer.hpp for documentation.
class SimplificationPass : public Pass {
public:
const char* name() const override { return "simplify-instructions"; }
Status Process() override;
IRContext::Analysis GetPreservedAnalyses() override {
return IRContext::kAnalysisDefUse |
IRContext::kAnalysisInstrToBlockMapping |
IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
IRContext::kAnalysisNameMap | IRContext::kAnalysisConstants |
IRContext::kAnalysisTypes;
}
private:
// Returns true if the module was changed. The simplifier is called on every
// instruction in |function| until nothing else in the function can be
// simplified.
bool SimplifyFunction(Function* function);
// FactorAddMul can create |folded_inst| Mul of new Add. If Mul, push any Add
// operand not in |seen_inst| into |worklist|. This is heavily restricted to
// improve compile time but can be expanded for future simplifications which
// simiarly create new operations.
void AddNewOperands(Instruction* folded_inst,
std::unordered_set<Instruction*>* inst_seen,
std::vector<Instruction*>* work_list);
};
} // namespace opt
} // namespace spvtools
#endif // SOURCE_OPT_SIMPLIFICATION_PASS_H_
|
