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Insert the debugging instructions in one fell-swoop so that it doesn't call the 

expensive "getFirstTerminator" call. This reduces the time of compilation in
PR12258 from >10 minutes to < 10 seconds.

llvm-svn: 152704
This commit is contained in:
Bill Wendling 2012-03-14 07:14:25 +00:00
parent c54f63b204
commit 618d57310a
1 changed files with 8 additions and 7 deletions
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15
llvm/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
View File

@ -855,16 +855,17 @@ EmitSchedule(MachineBasicBlock::iterator &InsertPos) {
}
// Add trailing DbgValue's before the terminator. FIXME: May want to add
// some of them before one or more conditional branches?
SmallVector<MachineInstr*, 8> DbgMIs;
while (DI != DE) {
MachineBasicBlock *InsertBB = Emitter.getBlock();
MachineBasicBlock::iterator Pos= Emitter.getBlock()->getFirstTerminator();
if (!(*DI)->isInvalidated()) {
MachineInstr *DbgMI= Emitter.EmitDbgValue(*DI, VRBaseMap);
if (DbgMI)
InsertBB->insert(Pos, DbgMI);
}
if (!(*DI)->isInvalidated())
if (MachineInstr *DbgMI = Emitter.EmitDbgValue(*DI, VRBaseMap))
DbgMIs.push_back(DbgMI);
++DI;
}
MachineBasicBlock *InsertBB = Emitter.getBlock();
MachineBasicBlock::iterator Pos = InsertBB->getFirstTerminator();
InsertBB->insert(Pos, DbgMIs.begin(), DbgMIs.end());
}
InsertPos = Emitter.getInsertPos();