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Add support for GL_EXT_shared_memory_block

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Uses SPV_KHR_workgroup_memory_explicit_layout.  Note that if
GL_EXT_scalar_block_layout is enabled, Workgroup blocks can also use
scalar layout.
This commit is contained in:
Caio Marcelo de Oliveira Filho 2020-06-02 16:58:51 -07:00
parent 3785ddd59a
commit 4bfbf62794
33 changed files with 822 additions and 8 deletions
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25
SPIRV/SpvPostProcess.cpp
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@ -443,6 +443,31 @@ void Builder::postProcessFeatures() {
memoryModel = spv::MemoryModelVulkanKHR;
addIncorporatedExtension(spv::E_SPV_KHR_vulkan_memory_model, spv::Spv_1_5);
}
// Add Aliased decoration if there's more than one Workgroup Block variable.
if (capabilities.find(spv::CapabilityWorkgroupMemoryExplicitLayoutKHR) != capabilities.end()) {
assert(entryPoints.size() == 1);
auto &ep = entryPoints[0];
std::vector<Id> workgroup_variables;
for (int i = 0; i < (int)ep->getNumOperands(); i++) {
if (!ep->isIdOperand(i))
continue;
const Id id = ep->getIdOperand(i);
const Instruction *instr = module.getInstruction(id);
if (instr->getOpCode() != spv::OpVariable)
continue;
if (instr->getImmediateOperand(0) == spv::StorageClassWorkgroup)
workgroup_variables.push_back(id);
}
if (workgroup_variables.size() > 1) {
for (size_t i = 0; i < workgroup_variables.size(); i++)
addDecoration(workgroup_variables[i], spv::DecorationAliased);
}
}
}
#endif