6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-28 04:33:05 +00:00
Code Issues Projects Releases Wiki Activity

llvm-objdump: Use help of CFG to print assembly when --cfg is passed.

Browse Source 
This way we can avoid printing unreachable code (data).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137057 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2011-08-08 18:32:12 +00:00
parent c040529269
commit a21d813709
1 changed files with 44 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
tools/llvm-objdump/llvm-objdump.cpp
View File

@ -248,9 +248,11 @@ static void DisassembleInput(const StringRef &Filename) {
raw_ostream &DebugOut = nulls();
#endif
if (!CFG) {
for (Index = Start; Index < End; Index += Size) {
MCInst Inst;
if (DisAsm->getInstruction(Inst, Size, memoryObject, Index, DebugOut)) {
if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
DebugOut)) {
uint64_t addr;
if (error(i->getAddress(addr))) break;
outs() << format("%8x:\t", addr + Index);
@ -264,12 +266,39 @@ static void DisassembleInput(const StringRef &Filename) {
}
}
if (CFG) {
} else {
// Create CFG and use it for disassembly.
MCFunction f =
MCFunction::createFunctionFromMC(Symbols[si].second, DisAsm.get(),
memoryObject, Start, End, InstrInfo,
DebugOut);
for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
bool hasPreds = false;
// Only print blocks that have predecessors.
// FIXME: Slow.
for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
++pi)
if (pi->second.contains(&fi->second)) {
hasPreds = true;
break;
}
if (!hasPreds && fi != f.begin())
continue;
for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
++ii) {
uint64_t addr;
if (error(i->getAddress(addr))) break;
const MCDecodedInst &Inst = fi->second.getInsts()[ii];
outs() << format("%8x:\t", addr + Inst.Address);
DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
IP->printInst(&Inst.Inst, outs());
outs() << '\n';
}
}
// Start a new dot file.
std::string Error;
raw_fd_ostream Out((f.getName().str() + ".dot").c_str(), Error);