1 //===- UnifyAliasedResourcePass.cpp - Pass to Unify Aliased Resources -----===//
9 // This file implements a pass that unifies access of multiple aliased resources
50 /// Collects all aliased resources in the given SPIR-V `moduleOp`.
85 /// resource that all resources should be unified into. Returns std::nullopt if
89   // scalarNumBits: contains all resources' scalar types' bit counts.  in deduceCanonicalResource()
90   // vectorNumBits: only contains resources whose element types are vectors.  in deduceCanonicalResource()
159 /// A class for analyzing aliased resources.
161 /// Resources are expected to be spirv.GlobalVarible that has a descriptor set
162 /// and binding number. Such resources are of the type
177   /// Returns all descriptors and their corresponding aliased resources.
190   /// Given the descriptor and aliased resources bound to it, analyze whether we
193                          ArrayRef<spirv::GlobalVariableOp> resources);
195   /// Mapping from a descriptor to all aliased resources bound to it.
210   // Collect all aliased resources first and put them into different sets  in ResourceAliasAnalysis()
272     const Descriptor &descriptor, ArrayRef<spirv::GlobalVariableOp> resources) {  in recordIfUnifiable()  argument
273   // Collect the element types for all resources in the current set.  in recordIfUnifiable()
275   for (spirv::GlobalVariableOp resource : resources) {  in recordIfUnifiable()
292   resourceMap[descriptor].assign(resources.begin(), resources.end());  in recordIfUnifiable()
293   canonicalResourceMap[descriptor] = resources[*index];  in recordIfUnifiable()
294   for (const auto &resource : llvm::enumerate(resources)) {  in recordIfUnifiable()
596   // Analyze aliased resources first.  in runOnOperation()
606   // Run patterns to rewrite usages of non-canonical resources.  in runOnOperation()
619     const auto &resources = dr.second;  in runOnOperation()  local
620     if (resources.size() == 1)  in runOnOperation()
621       resources.front()->removeAttr("aliased");  in runOnOperation()