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Move the specialized metadata nodes for the new debug info hierarchy into place, finishing off PR22464. I've done bootstraps (and all that) and I'm confident this commit is NFC as far as DWARF output is concerned. Let me know if I'm wrong :). The code changes are fairly mechanical: - Bumped the "Debug Info Version". - `DIBuilder` now creates the appropriate subclass of `MDNode`. - Subclasses of DIDescriptor now expect to hold their "MD" counterparts (e.g., `DIBasicType` expects `MDBasicType`). - Deleted a ton of dead code in `AsmWriter.cpp` and `DebugInfo.cpp` for printing comments. - Big update to LangRef to describe the nodes in the new hierarchy. Feel free to make it better. Testcase changes are enormous. There's an accompanying clang commit on its way. If you have out-of-tree debug info testcases, I just broke your build. - `upgrade-specialized-nodes.sh` is attached to PR22564. I used it to update all the IR testcases. - Unfortunately I failed to find way to script the updates to CHECK lines, so I updated all of these by hand. This was fairly painful, since the old CHECKs are difficult to reason about. That's one of the benefits of the new hierarchy. This work isn't quite finished, BTW. The `DIDescriptor` subclasses are almost empty wrappers, but not quite: they still have loose casting checks (see the `RETURN_FROM_RAW()` macro). Once they're completely gutted, I'll rename the "MD" classes to "DI" and kill the wrappers. I also expect to make a few schema changes now that it's easier to reason about everything. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231082 91177308-0d34-0410-b5e6-96231b3b80d8
129 lines
3.9 KiB
C++
129 lines
3.9 KiB
C++
//===-- ModuleDebugInfoPrinter.cpp - Prints module debug info metadata ----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass decodes the debug info metadata in a module and prints in a
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// (sufficiently-prepared-) human-readable form.
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//
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// For example, run this pass from opt along with the -analyze option, and
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// it'll print to standard output.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Passes.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/Function.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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class ModuleDebugInfoPrinter : public ModulePass {
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DebugInfoFinder Finder;
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public:
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static char ID; // Pass identification, replacement for typeid
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ModuleDebugInfoPrinter() : ModulePass(ID) {
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initializeModuleDebugInfoPrinterPass(*PassRegistry::getPassRegistry());
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}
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bool runOnModule(Module &M) override;
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.setPreservesAll();
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}
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void print(raw_ostream &O, const Module *M) const override;
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};
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}
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char ModuleDebugInfoPrinter::ID = 0;
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INITIALIZE_PASS(ModuleDebugInfoPrinter, "module-debuginfo",
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"Decodes module-level debug info", false, true)
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ModulePass *llvm::createModuleDebugInfoPrinterPass() {
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return new ModuleDebugInfoPrinter();
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}
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bool ModuleDebugInfoPrinter::runOnModule(Module &M) {
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Finder.processModule(M);
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return false;
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}
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static void printFile(raw_ostream &O, StringRef Filename, StringRef Directory,
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unsigned Line = 0) {
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if (Filename.empty())
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return;
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O << " from ";
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if (!Directory.empty())
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O << Directory << "/";
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O << Filename;
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if (Line)
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O << ":" << Line;
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}
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void ModuleDebugInfoPrinter::print(raw_ostream &O, const Module *M) const {
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// Printing the nodes directly isn't particularly helpful (since they
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// reference other nodes that won't be printed, particularly for the
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// filenames), so just print a few useful things.
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for (DICompileUnit CU : Finder.compile_units()) {
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O << "Compile unit: ";
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if (const char *Lang = LanguageString(CU.getLanguage()))
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O << Lang;
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else
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O << "unknown-language(" << CU.getLanguage() << ")";
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printFile(O, CU.getFilename(), CU.getDirectory());
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O << '\n';
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}
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for (DISubprogram S : Finder.subprograms()) {
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O << "Subprogram: " << S.getName();
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printFile(O, S.getFilename(), S.getDirectory(), S.getLineNumber());
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if (!S.getLinkageName().empty())
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O << " ('" << S.getLinkageName() << "')";
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O << '\n';
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}
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for (DIGlobalVariable GV : Finder.global_variables()) {
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O << "Global variable: " << GV.getName();
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printFile(O, GV.getFilename(), GV.getDirectory(), GV.getLineNumber());
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if (!GV.getLinkageName().empty())
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O << " ('" << GV.getLinkageName() << "')";
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O << '\n';
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}
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for (DIType T : Finder.types()) {
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O << "Type:";
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if (!T.getName().empty())
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O << ' ' << T.getName();
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printFile(O, T.getFilename(), T.getDirectory(), T.getLineNumber());
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if (T.isBasicType()) {
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DIBasicType BT(T.get());
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O << " ";
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if (const char *Encoding =
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dwarf::AttributeEncodingString(BT.getEncoding()))
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O << Encoding;
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else
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O << "unknown-encoding(" << BT.getEncoding() << ')';
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} else {
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O << ' ';
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if (const char *Tag = dwarf::TagString(T.getTag()))
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O << Tag;
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else
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O << "unknown-tag(" << T.getTag() << ")";
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}
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if (T.isCompositeType()) {
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DICompositeType CT(T.get());
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if (auto *S = CT.getIdentifier())
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O << " (identifier: '" << S->getString() << "')";
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}
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O << '\n';
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}
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}
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