LLVM 19.0.0git
DXILWriterPass.cpp
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1//===- DXILWriterPass.cpp - Bitcode writing pass --------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// DXILWriterPass implementation.
10//
11//===----------------------------------------------------------------------===//
12
13#include "DXILWriterPass.h"
14#include "DXILBitcodeWriter.h"
15#include "llvm/ADT/DenseMap.h"
16#include "llvm/ADT/StringRef.h"
18#include "llvm/IR/Constants.h"
20#include "llvm/IR/Module.h"
21#include "llvm/IR/PassManager.h"
23#include "llvm/Pass.h"
26
27using namespace llvm;
28using namespace llvm::dxil;
29
30namespace {
31class WriteDXILPass : public llvm::ModulePass {
32 raw_ostream &OS; // raw_ostream to print on
33
34public:
35 static char ID; // Pass identification, replacement for typeid
36 WriteDXILPass() : ModulePass(ID), OS(dbgs()) {
38 }
39
40 explicit WriteDXILPass(raw_ostream &o) : ModulePass(ID), OS(o) {
42 }
43
44 StringRef getPassName() const override { return "Bitcode Writer"; }
45
46 bool runOnModule(Module &M) override {
47 WriteDXILToFile(M, OS);
48 return false;
49 }
50 void getAnalysisUsage(AnalysisUsage &AU) const override {
51 AU.setPreservesAll();
52 }
53};
54
55class EmbedDXILPass : public llvm::ModulePass {
56public:
57 static char ID; // Pass identification, replacement for typeid
58 EmbedDXILPass() : ModulePass(ID) {
60 }
61
62 StringRef getPassName() const override { return "DXIL Embedder"; }
63
64 bool runOnModule(Module &M) override {
65 std::string Data;
67
68 const std::string OriginalTriple = M.getTargetTriple();
69 // Set to DXIL triple when write to bitcode.
70 // Only the output bitcode need to be DXIL triple.
71 M.setTargetTriple("dxil-ms-dx");
72
74
75 // Recover triple.
76 M.setTargetTriple(OriginalTriple);
77
78 Constant *ModuleConstant =
79 ConstantDataArray::get(M.getContext(), arrayRefFromStringRef(Data));
80 auto *GV = new llvm::GlobalVariable(M, ModuleConstant->getType(), true,
82 ModuleConstant, "dx.dxil");
83 GV->setSection("DXIL");
84 GV->setAlignment(Align(4));
85 appendToCompilerUsed(M, {GV});
86 return true;
87 }
88
89 void getAnalysisUsage(AnalysisUsage &AU) const override {
90 AU.setPreservesAll();
91 }
92};
93} // namespace
94
95char WriteDXILPass::ID = 0;
96INITIALIZE_PASS_BEGIN(WriteDXILPass, "dxil-write-bitcode", "Write Bitcode",
97 false, true)
99INITIALIZE_PASS_END(WriteDXILPass, "dxil-write-bitcode", "Write Bitcode", false,
100 true)
101
103 return new WriteDXILPass(Str);
104}
105
106char EmbedDXILPass::ID = 0;
107INITIALIZE_PASS(EmbedDXILPass, "dxil-embed", "Embed DXIL", false, true)
108
109ModulePass *llvm::createDXILEmbedderPass() { return new EmbedDXILPass(); }
basic Basic Alias true
This file contains the declarations for the subclasses of Constant, which represent the different fla...
dxil write Write Bitcode
dxil write bitcode
This file provides a bitcode writing pass.
This file defines the DenseMap class.
This is the interface to build a ModuleSummaryIndex for a module.
Module.h This file contains the declarations for the Module class.
This header defines various interfaces for pass management in LLVM.
#define INITIALIZE_PASS_DEPENDENCY(depName)
Definition: PassSupport.h:55
#define INITIALIZE_PASS_END(passName, arg, name, cfg, analysis)
Definition: PassSupport.h:59
#define INITIALIZE_PASS_BEGIN(passName, arg, name, cfg, analysis)
Definition: PassSupport.h:52
#define INITIALIZE_PASS(passName, arg, name, cfg, analysis)
Definition: PassSupport.h:38
raw_pwrite_stream & OS
Represent the analysis usage information of a pass.
void setPreservesAll()
Set by analyses that do not transform their input at all.
static Constant * get(LLVMContext &Context, ArrayRef< ElementTy > Elts)
get() constructor - Return a constant with array type with an element count and element type matching...
Definition: Constants.h:704
This is an important base class in LLVM.
Definition: Constant.h:41
@ PrivateLinkage
Like Internal, but omit from symbol table.
Definition: GlobalValue.h:60
ModulePass class - This class is used to implement unstructured interprocedural optimizations and ana...
Definition: Pass.h:251
virtual bool runOnModule(Module &M)=0
runOnModule - Virtual method overriden by subclasses to process the module being operated on.
Legacy wrapper pass to provide the ModuleSummaryIndex object.
A Module instance is used to store all the information related to an LLVM module.
Definition: Module.h:65
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
virtual void getAnalysisUsage(AnalysisUsage &) const
getAnalysisUsage - This function should be overriden by passes that need analysis information to do t...
Definition: Pass.cpp:98
virtual StringRef getPassName() const
getPassName - Return a nice clean name for a pass.
Definition: Pass.cpp:81
StringRef - Represent a constant reference to a string, i.e.
Definition: StringRef.h:50
Type * getType() const
All values are typed, get the type of this value.
Definition: Value.h:255
This class implements an extremely fast bulk output stream that can only output to a stream.
Definition: raw_ostream.h:52
A raw_ostream that writes to an std::string.
Definition: raw_ostream.h:660
unsigned ID
LLVM IR allows to use arbitrary numbers as calling convention identifiers.
Definition: CallingConv.h:24
void WriteDXILToFile(const Module &M, raw_ostream &Out)
Write the specified module to the specified raw output stream.
This is an optimization pass for GlobalISel generic memory operations.
Definition: AddressRanges.h:18
ModulePass * createDXILWriterPass(raw_ostream &Str)
Create and return a pass that writes the module to the specified ostream.
Error write(MCStreamer &Out, ArrayRef< std::string > Inputs, OnCuIndexOverflow OverflowOptValue)
Definition: DWP.cpp:601
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:163
void initializeEmbedDXILPassPass(PassRegistry &)
Initializer for dxil embedder pass.
void appendToCompilerUsed(Module &M, ArrayRef< GlobalValue * > Values)
Adds global values to the llvm.compiler.used list.
ModulePass * createDXILEmbedderPass()
Create and return a pass that writes the module to a global variable in the module for later emission...
void initializeWriteDXILPassPass(PassRegistry &)
Initializer for dxil writer pass.
This struct is a compact representation of a valid (non-zero power of two) alignment.
Definition: Alignment.h:39