1//===--- IRPrintingPasses.cpp - Module and Function printing passes -------===//
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// PrintModulePass and PrintFunctionPass implementations for the legacy pass
10// manager.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/IR/IRPrintingPasses.h"
15#include "llvm/ADT/StringRef.h"
16#include "llvm/IR/Function.h"
17#include "llvm/IR/Module.h"
18#include "llvm/IR/PrintPasses.h"
19#include "llvm/InitializePasses.h"
20#include "llvm/Pass.h"
21#include "llvm/Support/Debug.h"
22#include "llvm/Support/raw_ostream.h"
23
24using namespace llvm;
25
26cl::opt<bool> WriteNewDbgInfoFormat(
27 "write-experimental-debuginfo",
28 cl::desc("Write debug info in the new non-intrinsic format. Has no effect "
29 "if --preserve-input-debuginfo-format=true."),
30 cl::init(Val: false));
31
32namespace {
33
34class PrintModulePassWrapper : public ModulePass {
35 raw_ostream &OS;
36 std::string Banner;
37 bool ShouldPreserveUseListOrder;
38
39public:
40 static char ID;
41 PrintModulePassWrapper() : ModulePass(ID), OS(dbgs()) {}
42 PrintModulePassWrapper(raw_ostream &OS, const std::string &Banner,
43 bool ShouldPreserveUseListOrder)
44 : ModulePass(ID), OS(OS), Banner(Banner),
45 ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) {}
46
47 bool runOnModule(Module &M) override {
48 // RemoveDIs: Regardless of the format we've processed this module in, use
49 // `WriteNewDbgInfoFormat` to determine which format we use to write it.
50 ScopedDbgInfoFormatSetter FormatSetter(M, WriteNewDbgInfoFormat);
51 // Remove intrinsic declarations when printing in the new format.
52 // TODO: Move this into Module::setIsNewDbgInfoFormat when we're ready to
53 // update test output.
54 if (WriteNewDbgInfoFormat)
55 M.removeDebugIntrinsicDeclarations();
56
57 if (llvm::isFunctionInPrintList(FunctionName: "*")) {
58 if (!Banner.empty())
59 OS << Banner << "\n";
60 M.print(OS, AAW: nullptr, ShouldPreserveUseListOrder);
61 } else {
62 bool BannerPrinted = false;
63 for (const auto &F : M.functions()) {
64 if (llvm::isFunctionInPrintList(FunctionName: F.getName())) {
65 if (!BannerPrinted && !Banner.empty()) {
66 OS << Banner << "\n";
67 BannerPrinted = true;
68 }
69 F.print(OS);
70 }
71 }
72 }
73
74 return false;
75 }
76
77 void getAnalysisUsage(AnalysisUsage &AU) const override {
78 AU.setPreservesAll();
79 }
80
81 StringRef getPassName() const override { return "Print Module IR"; }
82};
83
84class PrintFunctionPassWrapper : public FunctionPass {
85 raw_ostream &OS;
86 std::string Banner;
87
88public:
89 static char ID;
90 PrintFunctionPassWrapper() : FunctionPass(ID), OS(dbgs()) {}
91 PrintFunctionPassWrapper(raw_ostream &OS, const std::string &Banner)
92 : FunctionPass(ID), OS(OS), Banner(Banner) {}
93
94 // This pass just prints a banner followed by the function as it's processed.
95 bool runOnFunction(Function &F) override {
96 // RemoveDIs: Regardless of the format we've processed this function in, use
97 // `WriteNewDbgInfoFormat` to determine which format we use to write it.
98 ScopedDbgInfoFormatSetter FormatSetter(F, WriteNewDbgInfoFormat);
99
100 if (isFunctionInPrintList(FunctionName: F.getName())) {
101 if (forcePrintModuleIR())
102 OS << Banner << " (function: " << F.getName() << ")\n"
103 << *F.getParent();
104 else
105 OS << Banner << '\n' << static_cast<Value &>(F);
106 }
107
108 return false;
109 }
110
111 void getAnalysisUsage(AnalysisUsage &AU) const override {
112 AU.setPreservesAll();
113 }
114
115 StringRef getPassName() const override { return "Print Function IR"; }
116};
117
118} // namespace
119
120char PrintModulePassWrapper::ID = 0;
121INITIALIZE_PASS(PrintModulePassWrapper, "print-module",
122 "Print module to stderr", false, true)
123char PrintFunctionPassWrapper::ID = 0;
124INITIALIZE_PASS(PrintFunctionPassWrapper, "print-function",
125 "Print function to stderr", false, true)
126
127ModulePass *llvm::createPrintModulePass(llvm::raw_ostream &OS,
128 const std::string &Banner,
129 bool ShouldPreserveUseListOrder) {
130 return new PrintModulePassWrapper(OS, Banner, ShouldPreserveUseListOrder);
131}
132
133FunctionPass *llvm::createPrintFunctionPass(llvm::raw_ostream &OS,
134 const std::string &Banner) {
135 return new PrintFunctionPassWrapper(OS, Banner);
136}
137
138bool llvm::isIRPrintingPass(Pass *P) {
139 const char *PID = (const char *)P->getPassID();
140
141 return (PID == &PrintModulePassWrapper::ID) ||
142 (PID == &PrintFunctionPassWrapper::ID);
143}
144

source code of llvm/lib/IR/IRPrintingPasses.cpp