mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-01 07:20:05 +00:00
f92e87a8f8
Example of an error:
spirv-tools/source/validate_cfg.cpp:516:45: error: chosen constructor is
explicit in copy-initialization:
_.current_function().RegisterBlockEnd({}, opcode);
127 lines
4.8 KiB
C++
127 lines
4.8 KiB
C++
// Copyright (c) 2015-2016 The Khronos Group Inc.
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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 LIBSPIRV_VAL_CONSTRUCT_H_
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#define LIBSPIRV_VAL_CONSTRUCT_H_
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#include <cstdint>
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#include <vector>
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namespace libspirv {
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enum class ConstructType {
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kNone,
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/// The set of blocks dominated by a selection header, minus the set of blocks
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/// dominated by the header's merge block
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kSelection,
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/// The set of blocks dominated by an OpLoopMerge's Continue Target and post
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/// dominated by the corresponding back
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kContinue,
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/// The set of blocks dominated by a loop header, minus the set of blocks
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/// dominated by the loop's merge block, minus the loop's corresponding
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/// continue construct
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kLoop,
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/// The set of blocks dominated by an OpSwitch's Target or Default, minus the
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/// set of blocks dominated by the OpSwitch's merge block (this construct is
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/// only defined for those OpSwitch Target or Default that are not equal to
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/// the OpSwitch's corresponding merge block)
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kCase
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};
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class BasicBlock;
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/// @brief This class tracks the CFG constructs as defined in the SPIR-V spec
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class Construct {
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public:
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Construct(ConstructType type, BasicBlock* dominator,
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BasicBlock* exit = nullptr,
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std::vector<Construct*> constructs = std::vector<Construct*>());
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/// Returns the type of the construct
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ConstructType type() const;
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const std::vector<Construct*>& corresponding_constructs() const;
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std::vector<Construct*>& corresponding_constructs();
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void set_corresponding_constructs(std::vector<Construct*> constructs);
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/// Returns the dominator block of the construct.
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///
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/// This is usually the header block or the first block of the construct.
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const BasicBlock* entry_block() const;
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/// Returns the dominator block of the construct.
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///
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/// This is usually the header block or the first block of the construct.
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BasicBlock* entry_block();
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/// Returns the exit block of the construct.
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///
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/// For a continue construct it is the backedge block of the corresponding
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/// loop construct. For the case construct it is the block that branches to
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/// the OpSwitch merge block or other case blocks. Otherwise it is the merge
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/// block of the corresponding header block
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const BasicBlock* exit_block() const;
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/// Returns the exit block of the construct.
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///
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/// For a continue construct it is the backedge block of the corresponding
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/// loop construct. For the case construct it is the block that branches to
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/// the OpSwitch merge block or other case blocks. Otherwise it is the merge
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/// block of the corresponding header block
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BasicBlock* exit_block();
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/// Sets the exit block for this construct. This is useful for continue
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/// constructs which do not know the back-edge block during construction
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void set_exit(BasicBlock* exit_block);
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private:
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/// The type of the construct
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ConstructType type_;
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/// These are the constructs that are related to this construct. These
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/// constructs can be the continue construct, for the corresponding loop
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/// construct, the case construct that are part of the same OpSwitch
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/// instruction
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///
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/// Here is a table that describes what constructs are included in
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/// @p corresponding_constructs_
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/// | this construct | corresponding construct |
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/// |----------------|----------------------------------|
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/// | loop | continue |
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/// | continue | loop |
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/// | case | other cases in the same OpSwitch |
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///
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/// kContinue and kLoop constructs will always have corresponding
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/// constructs even if they are represented by the same block
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std::vector<Construct*> corresponding_constructs_;
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/// @brief Dominator block for the construct
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///
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/// The dominator block for the construct. Depending on the construct this may
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/// be a selection header, a continue target of a loop, a loop header or a
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/// Target or Default block of a switch
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BasicBlock* entry_block_;
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/// @brief Exiting block for the construct
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///
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/// The exit block for the construct. This can be a merge block for the loop
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/// and selection constructs, a back-edge block for a continue construct, or
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/// the branching block for the case construct
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BasicBlock* exit_block_;
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};
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} /// namespace libspirv
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#endif /// LIBSPIRV_VAL_CONSTRUCT_H_
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