#include "DXILRootSignature.h"
#include "DirectX.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Analysis/DXILMetadataAnalysis.h"
#include "llvm/BinaryFormat/DXContainer.h"
#include "llvm/Frontend/HLSL/RootSignatureMetadata.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DiagnosticInfo.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/IR/Metadata.h"
#include "llvm/IR/Module.h"
#include "llvm/InitializePasses.h"
#include "llvm/MC/DXContainerRootSignature.h"
#include "llvm/Pass.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdint>

Functions
static std::optional< uint32_t >	extractMdIntValue (MDNode *Node, unsigned int OpId)
static bool	reportError (LLVMContext *Ctx, Twine Message, DiagnosticSeverity Severity=DS_Error)
static SmallDenseMap< const Function *, mcdxbc::RootSignatureDesc >	analyzeModule (Module &M)
	INITIALIZE_PASS_BEGIN (RootSignatureAnalysisWrapper, "dxil-root-signature-analysis", "DXIL Root Signature Analysis", true, true) INITIALIZE_PASS_END(RootSignatureAnalysisWrapper

Variables
dxil root signature	analysis
dxil root signature DXIL Root Signature	Analysis
dxil root signature DXIL Root Signature	true

Function Documentation

◆ analyzeModule()

SmallDenseMap< const Function *, mcdxbc::RootSignatureDesc > analyzeModule ( Module & M )

static

Root Signature are specified as following in the metadata:

!dx.rootsignatures = !{!2} ; list of function/root signature pairs !2 = !{ ptr @main, !3 } ; function, root signature !3 = !{ !4, !5, !6, !7 } ; list of root signature elements

So for each MDNode inside dx.rootsignatures NamedMDNode (the Root parameter of this function), the parsing process needs to loop through each of its operands and process the function, signature pair.

Definition at line 53 of file DXILRootSignature.cpp.

References assert(), llvm::dyn_cast(), extractMdIntValue(), F, llvm::MDOperand::get(), llvm::NamedMDNode::getNumOperands(), llvm::ValueAsMetadata::getValue(), llvm::handleAllErrors(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::NamedMDNode::operands(), llvm::hlsl::rootsig::MetadataParser::ParseRootSignature(), reportError(), llvm::Triple::RootSignature, and llvm::Expected< T >::takeError().