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Fix null dereference with -debug-only=dwarfdebug

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210299 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Alexey Samsonov 2014-06-05 23:10:19 +00:00
parent d605148d07
commit 3b889b9d31
1 changed files with 5 additions and 2 deletions
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7
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -1220,6 +1220,11 @@ DwarfDebug::collectVariableInfo(SmallPtrSet<const MDNode *, 16> &Processed) {
if (Begin->getNumOperands() > 1 && Begin->getOperand(0).isReg() &&
!Begin->getOperand(0).getReg())
continue;
DEBUG(dbgs() << "DotDebugLoc Pair:\n" << "\t" << *Begin);
if (End != nullptr)
DEBUG(dbgs() << "\t" << *End);
else
DEBUG(dbgs() << "\tNULL\n");
const MCSymbol *StartLabel = getLabelBeforeInsn(Begin);
assert(StartLabel && "Forgot label before DBG_VALUE starting a range!");
@ -1233,8 +1238,6 @@ DwarfDebug::collectVariableInfo(SmallPtrSet<const MDNode *, 16> &Processed) {
EndLabel = getLabelBeforeInsn(std::next(I)->first);
assert(EndLabel && "Forgot label after instruction ending a range!");
DEBUG(dbgs() << "DotDebugLoc Pair:\n"
<< "\t" << *Begin << "\t" << *End << "\n");
DebugLocEntry Loc(StartLabel, EndLabel, getDebugLocValue(Begin), TheCU);
if (DebugLoc.empty() || !DebugLoc.back().Merge(Loc))
DebugLoc.push_back(std::move(Loc));