From 7a029b6d7e58cb0f1010f14d99d7661e387cfb54 Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Fri, 9 Jul 2010 21:48:31 +0000 Subject: [PATCH] Update DBG_VALUE to refer appropriate stack slot in case of a spill. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108023 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocFast.cpp | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/lib/CodeGen/RegAllocFast.cpp b/lib/CodeGen/RegAllocFast.cpp index 272eff24e46..f44478e5dd0 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; -- 2.11.0