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Bug fixes. 

llvm-svn: 44549
This commit is contained in:
Evan Cheng 2007-12-03 21:31:55 +00:00
parent 4f76f22975
commit 40965448ff
1 changed files with 8 additions and 7 deletions
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15
llvm/lib/CodeGen/VirtRegMap.cpp
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@ -276,7 +276,7 @@ namespace {
SmallSet<MachineInstr*, 4> &ReMatDefs,
BitVector &RegKills,
std::vector<MachineOperand*> &KillOps,
VirtRegMap &VRM, bool StoreMaybeDead);
VirtRegMap &VRM);
void RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM);
};
}
@ -860,7 +860,7 @@ void LocalSpiller::SpillRegToStackSlot(MachineBasicBlock &MBB,
SmallSet<MachineInstr*, 4> &ReMatDefs,
BitVector &RegKills,
std::vector<MachineOperand*> &KillOps,
VirtRegMap &VRM, bool StoreMaybeDead) {
VirtRegMap &VRM) {
MRI->storeRegToStackSlot(MBB, next(MII), PhysReg, StackSlot, RC);
DOUT << "Store:\t" << *next(MII);
@ -896,15 +896,14 @@ void LocalSpiller::SpillRegToStackSlot(MachineBasicBlock &MBB,
}
}
MachineInstr *NewStore = next(MII);
LastStore = StoreMaybeDead ? NewStore : NULL;
LastStore = next(MII);
// If the stack slot value was previously available in some other
// register, change it now. Otherwise, make the register available,
// in PhysReg.
Spills.ModifyStackSlotOrReMat(StackSlot);
Spills.ClobberPhysReg(PhysReg);
Spills.addAvailable(StackSlot, NewStore, PhysReg);
Spills.addAvailable(StackSlot, LastStore, PhysReg);
++NumStores;
}
@ -987,8 +986,9 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) {
int StackSlot = VRM.getStackSlot(VirtReg);
MachineInstr *&LastStore = MaybeDeadStores[StackSlot];
SpillRegToStackSlot(MBB, MII, i, Phys, StackSlot, RC, LastStore,
Spills, ReMatDefs, RegKills, KillOps, VRM, false);
Spills, ReMatDefs, RegKills, KillOps, VRM);
}
NextMII = next(MII);
}
/// ReusedOperands - Keep track of operand reuse in case we need to undo
@ -1447,7 +1447,8 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) {
if (!MO.isDead()) {
MachineInstr *&LastStore = MaybeDeadStores[StackSlot];
SpillRegToStackSlot(MBB, MII, -1, PhysReg, StackSlot, RC, LastStore,
Spills, ReMatDefs, RegKills, KillOps, VRM, true);
Spills, ReMatDefs, RegKills, KillOps, VRM);
NextMII = next(MII);
// Check to see if this is a noop copy. If so, eliminate the
// instruction before considering the dest reg to be changed.