diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index 4608cdeaf5..dd8eb8705f 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -323,11 +323,13 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, const VirtRegMap &VRM) { 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 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, const VirtRegMap &VRM) { // 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 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, const VirtRegMap &VRM) { 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; |