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1 // Copyright (c) 2022 The Khronos Group Inc.
2 // Copyright (c) 2022 LunarG Inc.
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 //     http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 
16 #include "source/opt/analyze_live_input_pass.h"
17 
18 #include "source/opt/ir_context.h"
19 
20 namespace spvtools {
21 namespace opt {
22 
Process()23 Pass::Status AnalyzeLiveInputPass::Process() {
24   // Current functionality assumes shader capability
25   if (!context()->get_feature_mgr()->HasCapability(spv::Capability::Shader))
26     return Status::SuccessWithoutChange;
27   Pass::Status status = DoLiveInputAnalysis();
28   return status;
29 }
30 
DoLiveInputAnalysis()31 Pass::Status AnalyzeLiveInputPass::DoLiveInputAnalysis() {
32   // Current functionality only supports frag, tesc, tese or geom shaders.
33   // Report failure for any other stage.
34   auto stage = context()->GetStage();
35   if (stage != spv::ExecutionModel::Fragment &&
36       stage != spv::ExecutionModel::TessellationControl &&
37       stage != spv::ExecutionModel::TessellationEvaluation &&
38       stage != spv::ExecutionModel::Geometry)
39     return Status::Failure;
40   context()->get_liveness_mgr()->GetLiveness(live_locs_, live_builtins_);
41   return Status::SuccessWithoutChange;
42 }
43 
44 }  // namespace opt
45 }  // namespace spvtools
46