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llvm-objdump: Ignore unreachable blocks when printing the CFG.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136000 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -54,6 +54,8 @@ MCFunction::createFunctionFromMC(StringRef Name, const MCDisassembler *DisAsm,
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}
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}
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Splits.insert(Index+Size);
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} else if (Desc.isReturn()) {
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Splits.insert(Index+Size);
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}
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Instructions.push_back(MCDecodedInst(Index, Size, Inst));
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@ -27,6 +27,7 @@
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/GraphWriter.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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@ -280,12 +281,28 @@ static void DisassembleInput(const StringRef &Filename) {
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Out << "digraph " << f.getName() << " {\n";
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Out << "graph [ rankdir = \"LR\" ];\n";
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for (MCFunction::iterator i = f.begin(), e = f.end(); i != e; ++i) {
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bool hasPreds = false;
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// Only print blocks that have predecessors.
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// FIXME: Slow.
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for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
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++pi)
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for (pi->second->contains(&i->second)) {
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hasPreds = true;
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break;
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}
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if (!hasPreds && i != f.begin())
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continue;
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Out << '"' << (uintptr_t)&i->second << "\" [ label=\"<a>";
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// Print instructions.
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for (unsigned ii = 0, ie = i->second.getInsts().size(); ii != ie;
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++ii) {
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IP->printInst(&i->second.getInsts()[ii].Inst, Out);
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Out << '|';
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// Escape special chars and print the instruction in mnemonic form.
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std::string Str;
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raw_string_ostream OS(Str);
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IP->printInst(&i->second.getInsts()[ii].Inst, OS);
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Out << DOT::EscapeString(OS.str()) << '|';
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}
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Out << "<o>\" shape=\"record\" ];\n";
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