1 //===- Standard pass instrumentations handling ----------------*- C++ -*--===//
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
7 //===----------------------------------------------------------------------===//
10 /// This file defines IR-printing pass instrumentation callbacks as well as
11 /// StandardInstrumentations class that manages standard pass instrumentations.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Passes/StandardInstrumentations.h"
16 #include "llvm/ADT/Optional.h"
17 #include "llvm/Analysis/CallGraphSCCPass.h"
18 #include "llvm/Analysis/LazyCallGraph.h"
19 #include "llvm/Analysis/LoopInfo.h"
20 #include "llvm/IR/Function.h"
21 #include "llvm/IR/IRPrintingPasses.h"
22 #include "llvm/IR/Module.h"
23 #include "llvm/IR/PassInstrumentation.h"
24 #include "llvm/Support/Debug.h"
25 #include "llvm/Support/FormatVariadic.h"
26 #include "llvm/Support/raw_ostream.h"
32 /// Extracting Module out of \p IR unit. Also fills a textual description
33 /// of \p IR for use in header when printing.
34 Optional<std::pair<const Module *, std::string>> unwrapModule(Any IR) {
35 if (any_isa<const Module *>(IR))
36 return std::make_pair(any_cast<const Module *>(IR), std::string());
38 if (any_isa<const Function *>(IR)) {
39 const Function *F = any_cast<const Function *>(IR);
40 if (!llvm::isFunctionInPrintList(F->getName()))
42 const Module *M = F->getParent();
43 return std::make_pair(M, formatv(" (function: {0})", F->getName()).str());
46 if (any_isa<const LazyCallGraph::SCC *>(IR)) {
47 const LazyCallGraph::SCC *C = any_cast<const LazyCallGraph::SCC *>(IR);
48 for (const LazyCallGraph::Node &N : *C) {
49 const Function &F = N.getFunction();
50 if (!F.isDeclaration() && isFunctionInPrintList(F.getName())) {
51 const Module *M = F.getParent();
52 return std::make_pair(M, formatv(" (scc: {0})", C->getName()).str());
58 if (any_isa<const Loop *>(IR)) {
59 const Loop *L = any_cast<const Loop *>(IR);
60 const Function *F = L->getHeader()->getParent();
61 if (!isFunctionInPrintList(F->getName()))
63 const Module *M = F->getParent();
65 raw_string_ostream ss(LoopName);
66 L->getHeader()->printAsOperand(ss, false);
67 return std::make_pair(M, formatv(" (loop: {0})", ss.str()).str());
70 llvm_unreachable("Unknown IR unit");
73 void printIR(const Function *F, StringRef Banner,
74 StringRef Extra = StringRef()) {
75 if (!llvm::isFunctionInPrintList(F->getName()))
77 dbgs() << Banner << Extra << "\n" << static_cast<const Value &>(*F);
80 void printIR(const Module *M, StringRef Banner, StringRef Extra = StringRef()) {
81 if (llvm::isFunctionInPrintList("*") || llvm::forcePrintModuleIR()) {
82 dbgs() << Banner << Extra << "\n";
83 M->print(dbgs(), nullptr, false);
85 for (const auto &F : M->functions()) {
86 printIR(&F, Banner, Extra);
91 void printIR(const LazyCallGraph::SCC *C, StringRef Banner,
92 StringRef Extra = StringRef()) {
93 bool BannerPrinted = false;
94 for (const LazyCallGraph::Node &N : *C) {
95 const Function &F = N.getFunction();
96 if (!F.isDeclaration() && llvm::isFunctionInPrintList(F.getName())) {
98 dbgs() << Banner << Extra << "\n";
105 void printIR(const Loop *L, StringRef Banner) {
106 const Function *F = L->getHeader()->getParent();
107 if (!llvm::isFunctionInPrintList(F->getName()))
109 llvm::printLoop(const_cast<Loop &>(*L), dbgs(), std::string(Banner));
112 /// Generic IR-printing helper that unpacks a pointer to IRUnit wrapped into
113 /// llvm::Any and does actual print job.
114 void unwrapAndPrint(Any IR, StringRef Banner, bool ForceModule = false) {
116 if (auto UnwrappedModule = unwrapModule(IR))
117 printIR(UnwrappedModule->first, Banner, UnwrappedModule->second);
121 if (any_isa<const Module *>(IR)) {
122 const Module *M = any_cast<const Module *>(IR);
123 assert(M && "module should be valid for printing");
128 if (any_isa<const Function *>(IR)) {
129 const Function *F = any_cast<const Function *>(IR);
130 assert(F && "function should be valid for printing");
135 if (any_isa<const LazyCallGraph::SCC *>(IR)) {
136 const LazyCallGraph::SCC *C = any_cast<const LazyCallGraph::SCC *>(IR);
137 assert(C && "scc should be valid for printing");
138 std::string Extra = std::string(formatv(" (scc: {0})", C->getName()));
139 printIR(C, Banner, Extra);
143 if (any_isa<const Loop *>(IR)) {
144 const Loop *L = any_cast<const Loop *>(IR);
145 assert(L && "Loop should be valid for printing");
149 llvm_unreachable("Unknown wrapped IR type");
154 PrintIRInstrumentation::~PrintIRInstrumentation() {
155 assert(ModuleDescStack.empty() && "ModuleDescStack is not empty at exit");
158 void PrintIRInstrumentation::pushModuleDesc(StringRef PassID, Any IR) {
159 assert(StoreModuleDesc);
160 const Module *M = nullptr;
162 if (auto UnwrappedModule = unwrapModule(IR))
163 std::tie(M, Extra) = UnwrappedModule.getValue();
164 ModuleDescStack.emplace_back(M, Extra, PassID);
167 PrintIRInstrumentation::PrintModuleDesc
168 PrintIRInstrumentation::popModuleDesc(StringRef PassID) {
169 assert(!ModuleDescStack.empty() && "empty ModuleDescStack");
170 PrintModuleDesc ModuleDesc = ModuleDescStack.pop_back_val();
171 assert(std::get<2>(ModuleDesc).equals(PassID) && "malformed ModuleDescStack");
175 bool PrintIRInstrumentation::printBeforePass(StringRef PassID, Any IR) {
176 if (PassID.startswith("PassManager<") || PassID.contains("PassAdaptor<"))
179 // Saving Module for AfterPassInvalidated operations.
180 // Note: here we rely on a fact that we do not change modules while
181 // traversing the pipeline, so the latest captured module is good
182 // for all print operations that has not happen yet.
183 if (StoreModuleDesc && llvm::shouldPrintAfterPass(PassID))
184 pushModuleDesc(PassID, IR);
186 if (!llvm::shouldPrintBeforePass(PassID))
189 SmallString<20> Banner = formatv("*** IR Dump Before {0} ***", PassID);
190 unwrapAndPrint(IR, Banner, llvm::forcePrintModuleIR());
194 void PrintIRInstrumentation::printAfterPass(StringRef PassID, Any IR) {
195 if (PassID.startswith("PassManager<") || PassID.contains("PassAdaptor<"))
198 if (!llvm::shouldPrintAfterPass(PassID))
202 popModuleDesc(PassID);
204 SmallString<20> Banner = formatv("*** IR Dump After {0} ***", PassID);
205 unwrapAndPrint(IR, Banner, llvm::forcePrintModuleIR());
208 void PrintIRInstrumentation::printAfterPassInvalidated(StringRef PassID) {
209 if (!StoreModuleDesc || !llvm::shouldPrintAfterPass(PassID))
212 if (PassID.startswith("PassManager<") || PassID.contains("PassAdaptor<"))
217 StringRef StoredPassID;
218 std::tie(M, Extra, StoredPassID) = popModuleDesc(PassID);
219 // Additional filtering (e.g. -filter-print-func) can lead to module
220 // printing being skipped.
224 SmallString<20> Banner =
225 formatv("*** IR Dump After {0} *** invalidated: ", PassID);
226 printIR(M, Banner, Extra);
229 void PrintIRInstrumentation::registerCallbacks(
230 PassInstrumentationCallbacks &PIC) {
231 // BeforePass callback is not just for printing, it also saves a Module
232 // for later use in AfterPassInvalidated.
233 StoreModuleDesc = llvm::forcePrintModuleIR() && llvm::shouldPrintAfterPass();
234 if (llvm::shouldPrintBeforePass() || StoreModuleDesc)
235 PIC.registerBeforePassCallback(
236 [this](StringRef P, Any IR) { return this->printBeforePass(P, IR); });
238 if (llvm::shouldPrintAfterPass()) {
239 PIC.registerAfterPassCallback(
240 [this](StringRef P, Any IR) { this->printAfterPass(P, IR); });
241 PIC.registerAfterPassInvalidatedCallback(
242 [this](StringRef P) { this->printAfterPassInvalidated(P); });
246 void StandardInstrumentations::registerCallbacks(
247 PassInstrumentationCallbacks &PIC) {
248 PrintIR.registerCallbacks(PIC);
249 TimePasses.registerCallbacks(PIC);