================
@@ -160,6 +163,75 @@ void dumpRootElements(raw_ostream &OS,
ArrayRef<RootElement> Elements) {
OS << "}";
}
+static MDString *ClauseTypeToName(LLVMContext &Ctx, ClauseType Type) {
+ StringRef Name;
+ switch (Type) {
+ case ClauseType::CBuffer:
+ Name = "CBV";
+ break;
+ case ClauseType::SRV:
+ Name = "SRV";
+ break;
+ case ClauseType::UAV:
+ Name = "UAV";
+ break;
+ case ClauseType::Sampler:
+ Name = "Sampler";
+ break;
+ }
+ return MDString::get(Ctx, Name);
+}
+
+MDNode *MetadataBuilder::BuildRootSignature() {
+ for (const RootElement &Element : Elements) {
+ MDNode *ElementMD = nullptr;
+ if (const auto &Clause = std::get_if<DescriptorTableClause>(&Element))
+ ElementMD = BuildDescriptorTableClause(*Clause);
+ if (const auto &Table = std::get_if<DescriptorTable>(&Element))
+ ElementMD = BuildDescriptorTable(*Table);
+ GeneratedMetadata.push_back(ElementMD);
+ }
+
+ return MDNode::get(Ctx, GeneratedMetadata);
+}
+
+MDNode *MetadataBuilder::BuildDescriptorTable(const DescriptorTable &Table) {
+ IRBuilder<> B(Ctx);
+ SmallVector<Metadata *> TableOperands;
+ // Set the mandatory arguments
+ TableOperands.push_back(MDString::get(Ctx, "DescriptorTable"));
+ TableOperands.push_back(ConstantAsMetadata::get(
+ B.getInt32(llvm::to_underlying(Table.Visibility))));
+
+ // Remaining operands are references to the table's clauses. The in-memory
+ // representation of the Root Elements created from parsing will ensure that
+ // the previous N elements are the clauses for this table.
+ assert(Table.NumClauses <= GeneratedMetadata.size() &&
+ "Table expected all owned clauses to be generated already");
----------------
joaosaffran wrote:
Not sure how complex/useful this is, we could check how many
`DescriptorTableClause` are in `TableOperands` preceding the table. I think
this could be done like:
```C++
uint Count = 0;
// I think this should be the Element parameter, from BuildRootSignature
auto It = Element;
while (std::holds_alternative<DescriptorTableClause>(*It)){
Count ++;
Element --;
}
assert(Table.NumClauses == Count);
```
Not sure this code is correct/useful, but that is the idea.
https://github.com/llvm/llvm-project/pull/139633
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