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Update DBG_VALUE to refer appropriate stack slot in case of a spill.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108023 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-07-09 21:48:31 +00:00
parent 58dbf3784d
commit 7a029b6d7e
1 changed files with 19 additions and 2 deletions
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21
lib/CodeGen/RegAllocFast.cpp
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@ -764,8 +764,25 @@ void RAFast::AllocateBasicBlock() {
LiveRegMap::iterator LRI = LiveVirtRegs.find(Reg);
if (LRI != LiveVirtRegs.end())
setPhysReg(MI, i, LRI->second.PhysReg);
else
MO.setReg(0); // We can't allocate a physreg for a DebugValue, sorry!
else {
int SS = StackSlotForVirtReg[Reg];
if (SS == -1)
MO.setReg(0); // We can't allocate a physreg for a DebugValue, sorry!
else {
// Modify DBG_VALUE now that the value is in a spill slot.
uint64_t Offset = MI->getOperand(1).getImm();
const MDNode *MDPtr =
MI->getOperand(MI->getNumOperands()-1).getMetadata();
DebugLoc DL = MI->getDebugLoc();
if (MachineInstr *NewDV =
TII->emitFrameIndexDebugValue(*MF, SS, Offset, MDPtr, DL)) {
DEBUG(dbgs() << "Modifying debug info due to spill:" << "\t" << *MI);
MachineBasicBlock *MBB = MI->getParent();
MBB->insert(MBB->erase(MI), NewDV);
} else
MO.setReg(0); // We can't allocate a physreg for a DebugValue, sorry!
}
}
}
// Next instruction.
continue;