[llvm] r190178 - mi-sched: register pressure update tracing.

[Andrew Trick]

Author: atrick
Date: Fri Sep  6 12:32:39 2013
New Revision: 190178

URL: http://llvm.org/viewvc/llvm-project?rev=190178&view=rev
Log:
mi-sched: register pressure update tracing.

Modified:
    llvm/trunk/lib/CodeGen/MachineScheduler.cpp

Modified: llvm/trunk/lib/CodeGen/MachineScheduler.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineScheduler.cpp?rev=190178&r1=190177&r2=190178&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineScheduler.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineScheduler.cpp Fri Sep  6 12:32:39 2013
@@ -577,8 +577,10 @@ void ScheduleDAGMI::updatePressureDiffs(
   for (unsigned LUIdx = 0, LUEnd = LiveUses.size(); LUIdx != LUEnd; ++LUIdx) {
     /// FIXME: Currently assuming single-use physregs.
     unsigned Reg = LiveUses[LUIdx];
+    DEBUG(dbgs() << "  LiveReg: " << PrintVRegOrUnit(Reg, TRI) << "\n");
     if (!TRI->isVirtualRegister(Reg))
       continue;
+
     // This may be called before CurrentBottom has been initialized. However,
     // BotRPTracker must have a valid position. We want the value live into the
     // instruction or live out of the block, so ask for the previous
@@ -598,6 +600,8 @@ void ScheduleDAGMI::updatePressureDiffs(
     for (VReg2UseMap::iterator
            UI = VRegUses.find(Reg); UI != VRegUses.end(); ++UI) {
       SUnit *SU = UI->SU;
+      DEBUG(dbgs() << "  UpdateRegP: SU(" << SU->NodeNum << ") "
+            << *SU->getInstr());
       // If this use comes before the reaching def, it cannot be a last use, so
       // descrease its pressure change.
       if (!SU->isScheduled && SU != &ExitSU) {