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Add debugging code to the packetizer

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275455 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Krzysztof Parzyszek 2016-07-14 19:04:26 +00:00
parent fa907d312a
commit 8bd1db4d74
1 changed files with 25 additions and 0 deletions
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25
lib/CodeGen/DFAPacketizer.cpp
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@ -23,6 +23,8 @@
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "packets"
#include "llvm/CodeGen/DFAPacketizer.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
@ -222,6 +224,7 @@ void VLIWPacketizerList::endPacket(MachineBasicBlock *MBB,
}
CurrentPacketMIs.clear();
ResourceTracker->clearResources();
DEBUG(dbgs() << "End packet\n");
}
@ -235,6 +238,12 @@ void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB,
std::distance(BeginItr, EndItr));
VLIWScheduler->schedule();
DEBUG({
dbgs() << "Scheduling DAG of the packetize region\n";
for (SUnit &SU : VLIWScheduler->SUnits)
SU.dumpAll(VLIWScheduler);
});
// Generate MI -> SU map.
MIToSUnit.clear();
for (SUnit &SU : VLIWScheduler->SUnits)
@ -259,30 +268,46 @@ void VLIWPacketizerList::PacketizeMIs(MachineBasicBlock *MBB,
assert(SUI && "Missing SUnit Info!");
// Ask DFA if machine resource is available for MI.
DEBUG(dbgs() << "Checking resources for adding MI to packet " << MI);
bool ResourceAvail = ResourceTracker->canReserveResources(MI);
DEBUG({
if (ResourceAvail)
dbgs() << " Resources are available for adding MI to packet\n";
else
dbgs() << " Resources NOT available\n";
});
if (ResourceAvail && shouldAddToPacket(MI)) {
// Dependency check for MI with instructions in CurrentPacketMIs.
for (auto MJ : CurrentPacketMIs) {
SUnit *SUJ = MIToSUnit[MJ];
assert(SUJ && "Missing SUnit Info!");
DEBUG(dbgs() << " Checking against MJ " << *MJ);
// Is it legal to packetize SUI and SUJ together.
if (!isLegalToPacketizeTogether(SUI, SUJ)) {
DEBUG(dbgs() << " Not legal to add MI, try to prune\n");
// Allow packetization if dependency can be pruned.
if (!isLegalToPruneDependencies(SUI, SUJ)) {
// End the packet if dependency cannot be pruned.
DEBUG(dbgs() << " Could not prune dependencies for adding MI\n");
endPacket(MBB, MI);
break;
}
DEBUG(dbgs() << " Pruned dependence for adding MI\n");
}
}
} else {
DEBUG(if (ResourceAvail)
dbgs() << "Resources are available, but instruction should not be "
"added to packet\n " << MI);
// End the packet if resource is not available, or if the instruction
// shoud not be added to the current packet.
endPacket(MBB, MI);
}
// Add MI to the current packet.
DEBUG(dbgs() << "* Adding MI to packet " << MI << '\n');
BeginItr = addToPacket(MI);
} // For all instructions in the packetization range.