[llvm-commits] CVS: llvm/lib/CodeGen/VirtRegMap.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen:

VirtRegMap.cpp updated: 1.30 -> 1.31
---
Log message:

This patch adds and improves debugging output.  No functionality changes.


---
Diffs of the changes:  (+7 -3)

Index: llvm/lib/CodeGen/VirtRegMap.cpp
diff -u llvm/lib/CodeGen/VirtRegMap.cpp:1.30 llvm/lib/CodeGen/VirtRegMap.cpp:1.31
--- llvm/lib/CodeGen/VirtRegMap.cpp:1.30	Fri Oct  1 18:16:43 2004
+++ llvm/lib/CodeGen/VirtRegMap.cpp	Thu Oct 14 22:16:29 2004
@@ -323,11 +323,13 @@
             std::map<int, unsigned>::iterator SSI =
               SpillSlotsAvailable.find(StackSlot);
             if (SSI != SpillSlotsAvailable.end()) {
+              DEBUG(std::cerr << "Reusing SS#" << StackSlot << " from physreg "
+                              << MRI->getName(SSI->second) << " for vreg"
+                              << VirtReg <<" instead of reloading into physreg "
+                              << MRI->getName(VRM.getPhys(VirtReg)) << "\n");
               // If this stack slot value is already available, reuse it!
               PhysReg = SSI->second;
               MI.SetMachineOperandReg(i, PhysReg);
-              DEBUG(std::cerr << "Reusing SS#" << StackSlot << " from physreg "
-                              << MRI->getName(SSI->second) << "\n");
 
               // The only technical detail we have is that we don't know that
               // PhysReg won't be clobbered by a reloaded stack slot that occurs
@@ -519,6 +521,7 @@
           // If there is a dead store to this stack slot, nuke it now.
           MachineInstr *&LastStore = MaybeDeadStores[StackSlot];
           if (LastStore) {
+            DEBUG(std::cerr << " Killed store:\t" << *LastStore);
             ++NumDSE;
             MBB.erase(LastStore);
           }
@@ -539,7 +542,8 @@
           PhysRegsAvailable[PhysReg] = StackSlot;
           SpillSlotsAvailable[StackSlot] = PhysReg;
           DEBUG(std::cerr << "Updating SS#" << StackSlot <<" in physreg "
-                          << MRI->getName(PhysReg) << "\n");
+                          << MRI->getName(PhysReg) << " for virtreg #"
+                          << VirtReg << "\n");
 
           ++NumStores;
           VirtReg = PhysReg;