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llvm-mirror/tools/opt/BreakpointPrinter.cpp
Duncan P. N. Exon Smith 94512f24de DebugInfo: Remove MDString-based type references
Eliminate DITypeIdentifierMap and make DITypeRef a thin wrapper around
DIType*.  It is no longer legal to refer to a DICompositeType by its
'identifier:', and DIBuilder no longer retains all types with an
'identifier:' automatically.

Aside from the bitcode upgrade, this is mainly removing logic to resolve
an MDString-based reference to an actualy DIType.  The commits leading
up to this have made the implicit type map in DICompileUnit's
'retainedTypes:' field superfluous.

This does not remove DITypeRef, DIScopeRef, DINodeRef, and
DITypeRefArray, or stop using them in DI-related metadata.  Although as
of this commit they aren't serving a useful purpose, there are patchces
under review to reuse them for CodeView support.

The tests in LLVM were updated with deref-typerefs.sh, which is attached
to the thread "[RFC] Lazy-loading of debug info metadata":

  http://lists.llvm.org/pipermail/llvm-dev/2016-April/098318.html

llvm-svn: 267296
2016-04-23 21:08:00 +00:00

73 lines
2.1 KiB
C++

//===- BreakpointPrinter.cpp - Breakpoint location printer ----------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief Breakpoint location printer.
///
//===----------------------------------------------------------------------===//
#include "BreakpointPrinter.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Module.h"
#include "llvm/Pass.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
struct BreakpointPrinter : public ModulePass {
raw_ostream &Out;
static char ID;
BreakpointPrinter(raw_ostream &out) : ModulePass(ID), Out(out) {}
void getContextName(const DIScope *Context, std::string &N) {
if (auto *NS = dyn_cast<DINamespace>(Context)) {
if (!NS->getName().empty()) {
getContextName(NS->getScope(), N);
N = N + NS->getName().str() + "::";
}
} else if (auto *TY = dyn_cast<DIType>(Context)) {
if (!TY->getName().empty()) {
getContextName(TY->getScope().resolve(), N);
N = N + TY->getName().str() + "::";
}
}
}
bool runOnModule(Module &M) override {
StringSet<> Processed;
if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
std::string Name;
auto *SP = cast_or_null<DISubprogram>(NMD->getOperand(i));
if (!SP)
continue;
getContextName(SP->getScope().resolve(), Name);
Name = Name + SP->getDisplayName().str();
if (!Name.empty() && Processed.insert(Name).second) {
Out << Name << "\n";
}
}
return false;
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
AU.setPreservesAll();
}
};
char BreakpointPrinter::ID = 0;
}
ModulePass *llvm::createBreakpointPrinter(raw_ostream &out) {
return new BreakpointPrinter(out);
}