diff options
| -rw-r--r-- | lib/CodeGen/RegAllocFast.cpp | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp index 272eff2..f44478e 100644 --- a/lib/CodeGen/RegAllocFast.cpp +++ b/lib/CodeGen/RegAllocFast.cpp @@ -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; |