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https://github.com/KhronosGroup/SPIRV-Tools
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60043edfa1
We are no able to inline OpKill instructions into a continue construct. See #2433. However, we have to be able to inline to correctly do legalization. This commit creates a pass that will wrap OpKill instructions into a function of its own. That way we are able to inline the rest of the code. The follow up to this will be to not inline any function that contains an OpKill. Fixes #2726
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
// Copyright (c) 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_OPT_WRAP_OPKILL_H_
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#define SOURCE_OPT_WRAP_OPKILL_H_
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#include "source/opt/pass.h"
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namespace spvtools {
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namespace opt {
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// Documented in optimizer.hpp
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class WrapOpKill : public Pass {
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public:
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WrapOpKill() : void_type_id_(0) {}
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const char* name() const override { return "wrap-opkill"; }
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Status Process() override;
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IRContext::Analysis GetPreservedAnalyses() override {
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return IRContext::kAnalysisDefUse |
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IRContext::kAnalysisInstrToBlockMapping |
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IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
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IRContext::kAnalysisNameMap | IRContext::kAnalysisBuiltinVarId |
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IRContext::kAnalysisIdToFuncMapping | IRContext::kAnalysisConstants |
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IRContext::kAnalysisTypes;
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}
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private:
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// Replaces the OpKill instruction |inst| with a function call to a function
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// that contains a single instruction, which is OpKill. An OpUnreachable
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// instruction will be placed after the function call.
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void ReplaceWithFunctionCall(Instruction* inst);
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// Returns the id of the void type.
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uint32_t GetVoidTypeId();
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// Returns the id of the function type for a void function with no parameters.
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uint32_t GetVoidFunctionTypeId();
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// Return the id of a function that has return type void, no no parameters,
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// and contains a single instruction, which is an OpKill.
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uint32_t GetOpKillFuncId();
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// The id of the void type. If its value is 0, then the void type has not
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// been found or created yet.
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uint32_t void_type_id_;
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// The function that is a single instruction, which is an OpKill. The
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// function has a void return type and takes no parameters. If the function is
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// |nullptr|, then the function has not been generated.
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std::unique_ptr<Function> opkill_function_;
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};
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_WRAP_OPKILL_H_
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