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Add DEBUG messages.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134572 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-07-07 00:14:27 +00:00
parent 94ca42ff04
commit 7986289a9c
1 changed files with 9 additions and 2 deletions
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11
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -1885,8 +1885,12 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (Prev->isDebugValue()) {
// Coalesce identical entries at the end of History.
if (History.size() >= 2 &&
Prev->isIdenticalTo(History[History.size() - 2]))
Prev->isIdenticalTo(History[History.size() - 2])) {
DEBUG(dbgs() << "Coalesce identical DBG_VALUE entries:\n"
<< "\t" << *Prev
<< "\t" << *History[History.size() - 2] << "\n");
History.pop_back();
}
// Terminate old register assignments that don't reach MI;
MachineFunction::const_iterator PrevMBB = Prev->getParent();
@ -1896,9 +1900,12 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
// its basic block.
MachineBasicBlock::const_iterator LastMI =
PrevMBB->getLastNonDebugInstr();
if (LastMI == PrevMBB->end())
if (LastMI == PrevMBB->end()) {
// Drop DBG_VALUE for empty range.
DEBUG(dbgs() << "Drop DBG_VALUE for empty range:\n"
<< "\t" << *Prev << "\n");
History.pop_back();
}
else {
// Terminate after LastMI.
History.push_back(LastMI);