[llvm] r241759 - RegisterPressure: Add PressureDiff::dump()

[Matthias Braun]

Author: matze
Date: Wed Jul  8 18:40:27 2015
New Revision: 241759

URL: http://llvm.org/viewvc/llvm-project?rev=241759&view=rev
Log:
RegisterPressure: Add PressureDiff::dump()

Also display the pressure diff in the case of a
getMaxUpwardPressureDelta() verify failure.

Modified:
    llvm/trunk/include/llvm/CodeGen/RegisterPressure.h
    llvm/trunk/lib/CodeGen/RegisterPressure.cpp

Modified: llvm/trunk/include/llvm/CodeGen/RegisterPressure.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/CodeGen/RegisterPressure.h?rev=241759&r1=241758&r2=241759&view=diff
==============================================================================
--- llvm/trunk/include/llvm/CodeGen/RegisterPressure.h (original)
+++ llvm/trunk/include/llvm/CodeGen/RegisterPressure.h Wed Jul  8 18:40:27 2015
@@ -135,6 +135,8 @@ public:
 
   void addPressureChange(unsigned RegUnit, bool IsDec,
                          const MachineRegisterInfo *MRI);
+
+  LLVM_DUMP_METHOD void dump(const TargetRegisterInfo &TRI) const;
 };
 
 /// Array of PressureDiffs.

Modified: llvm/trunk/lib/CodeGen/RegisterPressure.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/RegisterPressure.cpp?rev=241759&r1=241758&r2=241759&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/RegisterPressure.cpp (original)
+++ llvm/trunk/lib/CodeGen/RegisterPressure.cpp Wed Jul  8 18:40:27 2015
@@ -77,6 +77,16 @@ void RegPressureTracker::dump() const {
   P.dump(TRI);
 }
 
+void PressureDiff::dump(const TargetRegisterInfo &TRI) const {
+  for (const PressureChange &Change : *this) {
+    if (!Change.isValid() || Change.getUnitInc() == 0)
+      continue;
+    dbgs() << "    " << TRI.getRegPressureSetName(Change.getPSet())
+           << " " << Change.getUnitInc();
+  }
+  dbgs() << '\n';
+}
+
 /// Increase the current pressure as impacted by these registers and bump
 /// the high water mark if needed.
 void RegPressureTracker::increaseRegPressure(ArrayRef<unsigned> RegUnits) {
@@ -787,6 +797,8 @@ getMaxUpwardPressureDelta(const MachineI
   RegPressureDelta Delta2;
   getUpwardPressureDelta(MI, *PDiff, Delta2, CriticalPSets, MaxPressureLimit);
   if (Delta != Delta2) {
+    dbgs() << "PDiff: ";
+    PDiff->dump(*TRI);
     dbgs() << "DELTA: " << *MI;
     if (Delta.Excess.isValid())
       dbgs() << "Excess1 " << TRI->getRegPressureSetName(Delta.Excess.getPSet())