mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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447 lines
19 KiB
C++
447 lines
19 KiB
C++
// Copyright (c) 2018 The Khronos Group Inc.
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// Copyright (c) 2018 Valve Corporation
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// Copyright (c) 2018 LunarG 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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#include "inst_bindless_check_pass.h"
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namespace {
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// Input Operand Indices
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static const int kSpvImageSampleImageIdInIdx = 0;
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static const int kSpvSampledImageImageIdInIdx = 0;
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static const int kSpvSampledImageSamplerIdInIdx = 1;
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static const int kSpvImageSampledImageIdInIdx = 0;
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static const int kSpvLoadPtrIdInIdx = 0;
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static const int kSpvAccessChainBaseIdInIdx = 0;
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static const int kSpvAccessChainIndex0IdInIdx = 1;
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static const int kSpvTypePointerTypeIdInIdx = 1;
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static const int kSpvTypeArrayLengthIdInIdx = 1;
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static const int kSpvConstantValueInIdx = 0;
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static const int kSpvVariableStorageClassInIdx = 0;
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} // anonymous namespace
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namespace spvtools {
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namespace opt {
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uint32_t InstBindlessCheckPass::GenDebugReadLength(
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uint32_t var_id, InstructionBuilder* builder) {
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uint32_t desc_set_idx =
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var2desc_set_[var_id] + kDebugInputBindlessOffsetLengths;
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uint32_t desc_set_idx_id = builder->GetUintConstantId(desc_set_idx);
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uint32_t binding_idx_id = builder->GetUintConstantId(var2binding_[var_id]);
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return GenDebugDirectRead({desc_set_idx_id, binding_idx_id}, builder);
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}
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uint32_t InstBindlessCheckPass::GenDebugReadInit(uint32_t var_id,
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uint32_t desc_idx_id,
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InstructionBuilder* builder) {
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uint32_t desc_set_base_id =
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builder->GetUintConstantId(kDebugInputBindlessInitOffset);
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uint32_t desc_set_idx_id = builder->GetUintConstantId(var2desc_set_[var_id]);
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uint32_t binding_idx_id = builder->GetUintConstantId(var2binding_[var_id]);
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uint32_t u_desc_idx_id = GenUintCastCode(desc_idx_id, builder);
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return GenDebugDirectRead(
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{desc_set_base_id, desc_set_idx_id, binding_idx_id, u_desc_idx_id},
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builder);
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}
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uint32_t InstBindlessCheckPass::CloneOriginalReference(
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ref_analysis* ref, InstructionBuilder* builder) {
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// If original is image based, start by cloning descriptor load
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uint32_t new_image_id = 0;
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if (ref->desc_load_id != 0) {
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Instruction* desc_load_inst = get_def_use_mgr()->GetDef(ref->desc_load_id);
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Instruction* new_load_inst = builder->AddLoad(
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desc_load_inst->type_id(),
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desc_load_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx));
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uid2offset_[new_load_inst->unique_id()] =
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uid2offset_[desc_load_inst->unique_id()];
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uint32_t new_load_id = new_load_inst->result_id();
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get_decoration_mgr()->CloneDecorations(desc_load_inst->result_id(),
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new_load_id);
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new_image_id = new_load_id;
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// Clone Image/SampledImage with new load, if needed
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if (ref->image_id != 0) {
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Instruction* image_inst = get_def_use_mgr()->GetDef(ref->image_id);
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if (image_inst->opcode() == SpvOp::SpvOpSampledImage) {
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Instruction* new_image_inst = builder->AddBinaryOp(
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image_inst->type_id(), SpvOpSampledImage, new_load_id,
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image_inst->GetSingleWordInOperand(kSpvSampledImageSamplerIdInIdx));
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uid2offset_[new_image_inst->unique_id()] =
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uid2offset_[image_inst->unique_id()];
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new_image_id = new_image_inst->result_id();
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} else {
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assert(image_inst->opcode() == SpvOp::SpvOpImage &&
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"expecting OpImage");
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Instruction* new_image_inst =
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builder->AddUnaryOp(image_inst->type_id(), SpvOpImage, new_load_id);
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uid2offset_[new_image_inst->unique_id()] =
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uid2offset_[image_inst->unique_id()];
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new_image_id = new_image_inst->result_id();
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}
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get_decoration_mgr()->CloneDecorations(ref->image_id, new_image_id);
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}
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}
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// Clone original reference
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std::unique_ptr<Instruction> new_ref_inst(ref->ref_inst->Clone(context()));
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uint32_t ref_result_id = ref->ref_inst->result_id();
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uint32_t new_ref_id = 0;
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if (ref_result_id != 0) {
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new_ref_id = TakeNextId();
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new_ref_inst->SetResultId(new_ref_id);
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}
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// Update new ref with new image if created
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if (new_image_id != 0)
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new_ref_inst->SetInOperand(kSpvImageSampleImageIdInIdx, {new_image_id});
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// Register new reference and add to new block
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Instruction* added_inst = builder->AddInstruction(std::move(new_ref_inst));
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uid2offset_[added_inst->unique_id()] =
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uid2offset_[ref->ref_inst->unique_id()];
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if (new_ref_id != 0)
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get_decoration_mgr()->CloneDecorations(ref_result_id, new_ref_id);
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return new_ref_id;
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}
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uint32_t InstBindlessCheckPass::GetImageId(Instruction* inst) {
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switch (inst->opcode()) {
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case SpvOp::SpvOpImageSampleImplicitLod:
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case SpvOp::SpvOpImageSampleExplicitLod:
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case SpvOp::SpvOpImageSampleDrefImplicitLod:
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case SpvOp::SpvOpImageSampleDrefExplicitLod:
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case SpvOp::SpvOpImageSampleProjImplicitLod:
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case SpvOp::SpvOpImageSampleProjExplicitLod:
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case SpvOp::SpvOpImageSampleProjDrefImplicitLod:
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case SpvOp::SpvOpImageSampleProjDrefExplicitLod:
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case SpvOp::SpvOpImageGather:
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case SpvOp::SpvOpImageDrefGather:
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case SpvOp::SpvOpImageQueryLod:
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case SpvOp::SpvOpImageSparseSampleImplicitLod:
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case SpvOp::SpvOpImageSparseSampleExplicitLod:
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case SpvOp::SpvOpImageSparseSampleDrefImplicitLod:
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case SpvOp::SpvOpImageSparseSampleDrefExplicitLod:
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case SpvOp::SpvOpImageSparseSampleProjImplicitLod:
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case SpvOp::SpvOpImageSparseSampleProjExplicitLod:
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case SpvOp::SpvOpImageSparseSampleProjDrefImplicitLod:
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case SpvOp::SpvOpImageSparseSampleProjDrefExplicitLod:
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case SpvOp::SpvOpImageSparseGather:
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case SpvOp::SpvOpImageSparseDrefGather:
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case SpvOp::SpvOpImageFetch:
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case SpvOp::SpvOpImageRead:
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case SpvOp::SpvOpImageQueryFormat:
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case SpvOp::SpvOpImageQueryOrder:
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case SpvOp::SpvOpImageQuerySizeLod:
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case SpvOp::SpvOpImageQuerySize:
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case SpvOp::SpvOpImageQueryLevels:
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case SpvOp::SpvOpImageQuerySamples:
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case SpvOp::SpvOpImageSparseFetch:
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case SpvOp::SpvOpImageSparseRead:
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case SpvOp::SpvOpImageWrite:
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return inst->GetSingleWordInOperand(kSpvImageSampleImageIdInIdx);
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default:
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break;
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}
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return 0;
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}
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Instruction* InstBindlessCheckPass::GetDescriptorTypeInst(
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Instruction* var_inst) {
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uint32_t var_type_id = var_inst->type_id();
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Instruction* var_type_inst = get_def_use_mgr()->GetDef(var_type_id);
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uint32_t desc_type_id =
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var_type_inst->GetSingleWordInOperand(kSpvTypePointerTypeIdInIdx);
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return get_def_use_mgr()->GetDef(desc_type_id);
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}
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bool InstBindlessCheckPass::AnalyzeDescriptorReference(Instruction* ref_inst,
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ref_analysis* ref) {
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ref->ref_inst = ref_inst;
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if (ref_inst->opcode() == SpvOpLoad || ref_inst->opcode() == SpvOpStore) {
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ref->desc_load_id = 0;
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ref->ptr_id = ref_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx);
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Instruction* ptr_inst = get_def_use_mgr()->GetDef(ref->ptr_id);
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if (ptr_inst->opcode() != SpvOp::SpvOpAccessChain) return false;
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ref->var_id = ptr_inst->GetSingleWordInOperand(kSpvAccessChainBaseIdInIdx);
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Instruction* var_inst = get_def_use_mgr()->GetDef(ref->var_id);
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if (var_inst->opcode() != SpvOp::SpvOpVariable) return false;
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uint32_t storage_class =
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var_inst->GetSingleWordInOperand(kSpvVariableStorageClassInIdx);
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switch (storage_class) {
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case SpvStorageClassUniform:
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case SpvStorageClassUniformConstant:
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case SpvStorageClassStorageBuffer:
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break;
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default:
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return false;
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break;
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}
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Instruction* desc_type_inst = GetDescriptorTypeInst(var_inst);
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switch (desc_type_inst->opcode()) {
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case SpvOpTypeArray:
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case SpvOpTypeRuntimeArray:
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// A load through a descriptor array will have at least 3 operands. We
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// do not want to instrument loads of descriptors here which are part of
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// an image-based reference.
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if (ptr_inst->NumInOperands() < 3) return false;
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ref->index_id =
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ptr_inst->GetSingleWordInOperand(kSpvAccessChainIndex0IdInIdx);
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break;
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default:
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ref->index_id = 0;
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break;
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}
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return true;
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}
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// Reference is not load or store. If not an image-based reference, return.
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ref->image_id = GetImageId(ref_inst);
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if (ref->image_id == 0) return false;
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Instruction* image_inst = get_def_use_mgr()->GetDef(ref->image_id);
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Instruction* desc_load_inst = nullptr;
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if (image_inst->opcode() == SpvOp::SpvOpSampledImage) {
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ref->desc_load_id =
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image_inst->GetSingleWordInOperand(kSpvSampledImageImageIdInIdx);
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desc_load_inst = get_def_use_mgr()->GetDef(ref->desc_load_id);
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} else if (image_inst->opcode() == SpvOp::SpvOpImage) {
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ref->desc_load_id =
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image_inst->GetSingleWordInOperand(kSpvImageSampledImageIdInIdx);
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desc_load_inst = get_def_use_mgr()->GetDef(ref->desc_load_id);
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} else {
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ref->desc_load_id = ref->image_id;
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desc_load_inst = image_inst;
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ref->image_id = 0;
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}
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if (desc_load_inst->opcode() != SpvOp::SpvOpLoad) {
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// TODO(greg-lunarg): Handle additional possibilities?
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return false;
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}
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ref->ptr_id = desc_load_inst->GetSingleWordInOperand(kSpvLoadPtrIdInIdx);
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Instruction* ptr_inst = get_def_use_mgr()->GetDef(ref->ptr_id);
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if (ptr_inst->opcode() == SpvOp::SpvOpVariable) {
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ref->index_id = 0;
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ref->var_id = ref->ptr_id;
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} else if (ptr_inst->opcode() == SpvOp::SpvOpAccessChain) {
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if (ptr_inst->NumInOperands() != 2) {
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assert(false && "unexpected bindless index number");
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return false;
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}
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ref->index_id =
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ptr_inst->GetSingleWordInOperand(kSpvAccessChainIndex0IdInIdx);
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ref->var_id = ptr_inst->GetSingleWordInOperand(kSpvAccessChainBaseIdInIdx);
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Instruction* var_inst = get_def_use_mgr()->GetDef(ref->var_id);
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if (var_inst->opcode() != SpvOpVariable) {
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assert(false && "unexpected bindless base");
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return false;
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}
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} else {
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// TODO(greg-lunarg): Handle additional possibilities?
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return false;
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}
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return true;
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}
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void InstBindlessCheckPass::GenCheckCode(
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uint32_t check_id, uint32_t error_id, uint32_t length_id,
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uint32_t stage_idx, ref_analysis* ref,
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std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
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BasicBlock* back_blk_ptr = &*new_blocks->back();
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InstructionBuilder builder(
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context(), back_blk_ptr,
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IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
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// Gen conditional branch on check_id. Valid branch generates original
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// reference. Invalid generates debug output and zero result (if needed).
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uint32_t merge_blk_id = TakeNextId();
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uint32_t valid_blk_id = TakeNextId();
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uint32_t invalid_blk_id = TakeNextId();
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std::unique_ptr<Instruction> merge_label(NewLabel(merge_blk_id));
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std::unique_ptr<Instruction> valid_label(NewLabel(valid_blk_id));
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std::unique_ptr<Instruction> invalid_label(NewLabel(invalid_blk_id));
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(void)builder.AddConditionalBranch(check_id, valid_blk_id, invalid_blk_id,
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merge_blk_id, SpvSelectionControlMaskNone);
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// Gen valid bounds branch
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std::unique_ptr<BasicBlock> new_blk_ptr(
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new BasicBlock(std::move(valid_label)));
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builder.SetInsertPoint(&*new_blk_ptr);
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uint32_t new_ref_id = CloneOriginalReference(ref, &builder);
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(void)builder.AddBranch(merge_blk_id);
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new_blocks->push_back(std::move(new_blk_ptr));
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// Gen invalid block
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new_blk_ptr.reset(new BasicBlock(std::move(invalid_label)));
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builder.SetInsertPoint(&*new_blk_ptr);
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uint32_t u_index_id = GenUintCastCode(ref->index_id, &builder);
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GenDebugStreamWrite(uid2offset_[ref->ref_inst->unique_id()], stage_idx,
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{error_id, u_index_id, length_id}, &builder);
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// Remember last invalid block id
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uint32_t last_invalid_blk_id = new_blk_ptr->GetLabelInst()->result_id();
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// Gen zero for invalid reference
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uint32_t ref_type_id = ref->ref_inst->type_id();
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(void)builder.AddBranch(merge_blk_id);
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new_blocks->push_back(std::move(new_blk_ptr));
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// Gen merge block
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new_blk_ptr.reset(new BasicBlock(std::move(merge_label)));
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builder.SetInsertPoint(&*new_blk_ptr);
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// Gen phi of new reference and zero, if necessary, and replace the
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// result id of the original reference with that of the Phi. Kill original
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// reference.
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if (new_ref_id != 0) {
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Instruction* phi_inst = builder.AddPhi(
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ref_type_id, {new_ref_id, valid_blk_id, GetNullId(ref_type_id),
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last_invalid_blk_id});
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context()->ReplaceAllUsesWith(ref->ref_inst->result_id(),
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phi_inst->result_id());
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}
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new_blocks->push_back(std::move(new_blk_ptr));
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context()->KillInst(ref->ref_inst);
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}
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void InstBindlessCheckPass::GenBoundsCheckCode(
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BasicBlock::iterator ref_inst_itr,
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UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t stage_idx,
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std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
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// Look for reference through indexed descriptor. If found, analyze and
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// save components. If not, return.
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ref_analysis ref;
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if (!AnalyzeDescriptorReference(&*ref_inst_itr, &ref)) return;
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Instruction* ptr_inst = get_def_use_mgr()->GetDef(ref.ptr_id);
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if (ptr_inst->opcode() != SpvOp::SpvOpAccessChain) return;
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// If index and bound both compile-time constants and index < bound,
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// return without changing
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Instruction* var_inst = get_def_use_mgr()->GetDef(ref.var_id);
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Instruction* desc_type_inst = GetDescriptorTypeInst(var_inst);
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uint32_t length_id = 0;
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if (desc_type_inst->opcode() == SpvOpTypeArray) {
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length_id =
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desc_type_inst->GetSingleWordInOperand(kSpvTypeArrayLengthIdInIdx);
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Instruction* index_inst = get_def_use_mgr()->GetDef(ref.index_id);
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Instruction* length_inst = get_def_use_mgr()->GetDef(length_id);
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if (index_inst->opcode() == SpvOpConstant &&
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length_inst->opcode() == SpvOpConstant &&
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index_inst->GetSingleWordInOperand(kSpvConstantValueInIdx) <
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length_inst->GetSingleWordInOperand(kSpvConstantValueInIdx))
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return;
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} else if (!input_length_enabled_ ||
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desc_type_inst->opcode() != SpvOpTypeRuntimeArray) {
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return;
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}
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// Move original block's preceding instructions into first new block
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std::unique_ptr<BasicBlock> new_blk_ptr;
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MovePreludeCode(ref_inst_itr, ref_block_itr, &new_blk_ptr);
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InstructionBuilder builder(
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context(), &*new_blk_ptr,
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IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
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new_blocks->push_back(std::move(new_blk_ptr));
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uint32_t error_id = builder.GetUintConstantId(kInstErrorBindlessBounds);
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// If length id not yet set, descriptor array is runtime size so
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// generate load of length from stage's debug input buffer.
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if (length_id == 0) {
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assert(desc_type_inst->opcode() == SpvOpTypeRuntimeArray &&
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"unexpected bindless type");
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length_id = GenDebugReadLength(ref.var_id, &builder);
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}
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// Generate full runtime bounds test code with true branch
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// being full reference and false branch being debug output and zero
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// for the referenced value.
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Instruction* ult_inst =
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builder.AddBinaryOp(GetBoolId(), SpvOpULessThan, ref.index_id, length_id);
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GenCheckCode(ult_inst->result_id(), error_id, length_id, stage_idx, &ref,
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new_blocks);
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// Move original block's remaining code into remainder/merge block and add
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// to new blocks
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BasicBlock* back_blk_ptr = &*new_blocks->back();
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MovePostludeCode(ref_block_itr, back_blk_ptr);
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}
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void InstBindlessCheckPass::GenInitCheckCode(
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BasicBlock::iterator ref_inst_itr,
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UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t stage_idx,
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std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
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// Look for reference through descriptor. If not, return.
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ref_analysis ref;
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if (!AnalyzeDescriptorReference(&*ref_inst_itr, &ref)) return;
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// Move original block's preceding instructions into first new block
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std::unique_ptr<BasicBlock> new_blk_ptr;
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MovePreludeCode(ref_inst_itr, ref_block_itr, &new_blk_ptr);
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InstructionBuilder builder(
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context(), &*new_blk_ptr,
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IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
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new_blocks->push_back(std::move(new_blk_ptr));
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// Read initialization status from debug input buffer. If index id not yet
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// set, binding is single descriptor, so set index to constant 0.
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uint32_t zero_id = builder.GetUintConstantId(0u);
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if (ref.index_id == 0) ref.index_id = zero_id;
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uint32_t init_id = GenDebugReadInit(ref.var_id, ref.index_id, &builder);
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// Generate full runtime non-zero init test code with true branch
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// being full reference and false branch being debug output and zero
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// for the referenced value.
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Instruction* uneq_inst =
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|
builder.AddBinaryOp(GetBoolId(), SpvOpINotEqual, init_id, zero_id);
|
|
uint32_t error_id = builder.GetUintConstantId(kInstErrorBindlessUninit);
|
|
GenCheckCode(uneq_inst->result_id(), error_id, zero_id, stage_idx, &ref,
|
|
new_blocks);
|
|
// Move original block's remaining code into remainder/merge block and add
|
|
// to new blocks
|
|
BasicBlock* back_blk_ptr = &*new_blocks->back();
|
|
MovePostludeCode(ref_block_itr, back_blk_ptr);
|
|
}
|
|
|
|
void InstBindlessCheckPass::InitializeInstBindlessCheck() {
|
|
// Initialize base class
|
|
InitializeInstrument();
|
|
// If runtime array length support enabled, create variable mappings. Length
|
|
// support is always enabled if descriptor init check is enabled.
|
|
if (input_length_enabled_)
|
|
for (auto& anno : get_module()->annotations())
|
|
if (anno.opcode() == SpvOpDecorate) {
|
|
if (anno.GetSingleWordInOperand(1u) == SpvDecorationDescriptorSet)
|
|
var2desc_set_[anno.GetSingleWordInOperand(0u)] =
|
|
anno.GetSingleWordInOperand(2u);
|
|
else if (anno.GetSingleWordInOperand(1u) == SpvDecorationBinding)
|
|
var2binding_[anno.GetSingleWordInOperand(0u)] =
|
|
anno.GetSingleWordInOperand(2u);
|
|
}
|
|
}
|
|
|
|
Pass::Status InstBindlessCheckPass::ProcessImpl() {
|
|
// Perform bindless bounds check on each entry point function in module
|
|
InstProcessFunction pfn =
|
|
[this](BasicBlock::iterator ref_inst_itr,
|
|
UptrVectorIterator<BasicBlock> ref_block_itr, uint32_t stage_idx,
|
|
std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
|
|
return GenBoundsCheckCode(ref_inst_itr, ref_block_itr, stage_idx,
|
|
new_blocks);
|
|
};
|
|
bool modified = InstProcessEntryPointCallTree(pfn);
|
|
if (input_init_enabled_) {
|
|
// Perform descriptor initialization check on each entry point function in
|
|
// module
|
|
pfn = [this](BasicBlock::iterator ref_inst_itr,
|
|
UptrVectorIterator<BasicBlock> ref_block_itr,
|
|
uint32_t stage_idx,
|
|
std::vector<std::unique_ptr<BasicBlock>>* new_blocks) {
|
|
return GenInitCheckCode(ref_inst_itr, ref_block_itr, stage_idx,
|
|
new_blocks);
|
|
};
|
|
modified |= InstProcessEntryPointCallTree(pfn);
|
|
}
|
|
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
|
|
}
|
|
|
|
Pass::Status InstBindlessCheckPass::Process() {
|
|
InitializeInstBindlessCheck();
|
|
return ProcessImpl();
|
|
}
|
|
|
|
} // namespace opt
|
|
} // namespace spvtools
|