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Merge pull request #1460 from KhronosGroup/postprocess
Non-Functional: Add postprocess as more robust way to add capabilities
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@@ -3,6 +3,7 @@ set(SOURCES | |
| InReadableOrder.cpp | ||
| Logger.cpp | ||
| SpvBuilder.cpp | ||
| SpvPostProcess.cpp | ||
| doc.cpp | ||
| disassemble.cpp) | ||
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| // | ||
| // Copyright (C) 2016-2018 Google, Inc. | ||
| // | ||
| // All rights reserved. | ||
| // | ||
| // Redistribution and use in source and binary forms, with or without | ||
| // modification, are permitted provided that the following conditions | ||
| // are met: | ||
| // | ||
| // Redistributions of source code must retain the above copyright | ||
| // notice, this list of conditions and the following disclaimer. | ||
| // | ||
| // Redistributions in binary form must reproduce the above | ||
| // copyright notice, this list of conditions and the following | ||
| // disclaimer in the documentation and/or other materials provided | ||
| // with the distribution. | ||
| // | ||
| // Neither the name of 3Dlabs Inc. Ltd. nor the names of its | ||
| // contributors may be used to endorse or promote products derived | ||
| // from this software without specific prior written permission. | ||
| // | ||
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | ||
| // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | ||
| // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | ||
| // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | ||
| // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
| // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | ||
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | ||
| // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | ||
| // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
| // POSSIBILITY OF SUCH DAMAGE. | ||
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| // | ||
| // Post-processing for SPIR-V IR, in internal form, not standard binary form. | ||
| // | ||
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| #include <cassert> | ||
| #include <cstdlib> | ||
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| #include <unordered_set> | ||
| #include <algorithm> | ||
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| #include "SpvBuilder.h" | ||
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| #include "spirv.hpp" | ||
| #include "GlslangToSpv.h" | ||
| #include "SpvBuilder.h" | ||
| namespace spv { | ||
| #include "GLSL.std.450.h" | ||
| #include "GLSL.ext.KHR.h" | ||
| #include "GLSL.ext.EXT.h" | ||
| #ifdef AMD_EXTENSIONS | ||
| #include "GLSL.ext.AMD.h" | ||
| #endif | ||
| #ifdef NV_EXTENSIONS | ||
| #include "GLSL.ext.NV.h" | ||
| #endif | ||
| } | ||
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| namespace spv { | ||
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| // Called for each instruction in a block. | ||
| void Builder::postProcess(Instruction& inst) | ||
| { | ||
| // Add capabilities based simply on the opcode. | ||
| switch (inst.getOpCode()) { | ||
| case OpExtInst: | ||
| switch (inst.getIdOperand(1)) { | ||
| case GLSLstd450InterpolateAtCentroid: | ||
| case GLSLstd450InterpolateAtSample: | ||
| case GLSLstd450InterpolateAtOffset: | ||
| addCapability(CapabilityInterpolationFunction); | ||
| break; | ||
| default: | ||
| break; | ||
| } | ||
| break; | ||
| case OpDPdxFine: | ||
| case OpDPdyFine: | ||
| case OpFwidthFine: | ||
| case OpDPdxCoarse: | ||
| case OpDPdyCoarse: | ||
| case OpFwidthCoarse: | ||
| addCapability(CapabilityDerivativeControl); | ||
| break; | ||
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| case OpImageQueryLod: | ||
| case OpImageQuerySize: | ||
| case OpImageQuerySizeLod: | ||
| case OpImageQuerySamples: | ||
| case OpImageQueryLevels: | ||
| addCapability(CapabilityImageQuery); | ||
| break; | ||
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| #ifdef NV_EXTENSIONS | ||
| case OpGroupNonUniformPartitionNV: | ||
| addExtension(E_SPV_NV_shader_subgroup_partitioned); | ||
| addCapability(CapabilityGroupNonUniformPartitionedNV); | ||
| break; | ||
| #endif | ||
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| default: | ||
| break; | ||
| } | ||
| } | ||
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| // Called for each instruction in a reachable block. | ||
| void Builder::postProcessReachable(Instruction& inst) | ||
| { | ||
| // did have code here, but questionable to do so without deleting the instructions | ||
| } | ||
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| // comment in header | ||
| void Builder::postProcess() | ||
| { | ||
| std::unordered_set<const Block*> reachableBlocks; | ||
| std::unordered_set<Id> unreachableDefinitions; | ||
| // Collect IDs defined in unreachable blocks. For each function, label the | ||
| // reachable blocks first. Then for each unreachable block, collect the | ||
| // result IDs of the instructions in it. | ||
| for (auto fi = module.getFunctions().cbegin(); fi != module.getFunctions().cend(); fi++) { | ||
| Function* f = *fi; | ||
| Block* entry = f->getEntryBlock(); | ||
| inReadableOrder(entry, [&reachableBlocks](const Block* b) { reachableBlocks.insert(b); }); | ||
| for (auto bi = f->getBlocks().cbegin(); bi != f->getBlocks().cend(); bi++) { | ||
| Block* b = *bi; | ||
| if (reachableBlocks.count(b) == 0) { | ||
| for (auto ii = b->getInstructions().cbegin(); ii != b->getInstructions().cend(); ii++) | ||
| unreachableDefinitions.insert(ii->get()->getResultId()); | ||
| } | ||
| } | ||
| } | ||
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| // Remove unneeded decorations, for unreachable instructions | ||
| decorations.erase(std::remove_if(decorations.begin(), decorations.end(), | ||
| [&unreachableDefinitions](std::unique_ptr<Instruction>& I) -> bool { | ||
| Id decoration_id = I.get()->getIdOperand(0); | ||
| return unreachableDefinitions.count(decoration_id) != 0; | ||
| }), | ||
| decorations.end()); | ||
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| // Add per-instruction capabilities, extensions, etc., | ||
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| // process all reachable instructions... | ||
| for (auto bi = reachableBlocks.cbegin(); bi != reachableBlocks.cend(); ++bi) { | ||
| const Block* block = *bi; | ||
| const auto function = [this](const std::unique_ptr<Instruction>& inst) { postProcessReachable(*inst.get()); }; | ||
| std::for_each(block->getInstructions().begin(), block->getInstructions().end(), function); | ||
| } | ||
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| // process all block-contained instructions | ||
| for (auto fi = module.getFunctions().cbegin(); fi != module.getFunctions().cend(); fi++) { | ||
| Function* f = *fi; | ||
| for (auto bi = f->getBlocks().cbegin(); bi != f->getBlocks().cend(); bi++) { | ||
| Block* b = *bi; | ||
| for (auto ii = b->getInstructions().cbegin(); ii != b->getInstructions().cend(); ii++) | ||
| postProcess(*ii->get()); | ||
| } | ||
| } | ||
| } | ||
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| }; // end spv namespace |