diff options
Diffstat (limited to 'lib/CodeGen/MachineRegisterInfo.cpp')
-rw-r--r-- | lib/CodeGen/MachineRegisterInfo.cpp | 37 |
1 files changed, 9 insertions, 28 deletions
diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp index 724d81cdba..ea5ca0cad8 100644 --- a/lib/CodeGen/MachineRegisterInfo.cpp +++ b/lib/CodeGen/MachineRegisterInfo.cpp @@ -147,6 +147,15 @@ bool MachineRegisterInfo::isLiveOut(unsigned Reg) const { return false; } +/// getLiveInPhysReg - If VReg is a live-in virtual register, return the +/// corresponding live-in physical register. +unsigned MachineRegisterInfo::getLiveInPhysReg(unsigned VReg) const { + for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I) + if (I->second == VReg) + return I->first; + return 0; +} + static cl::opt<bool> SchedLiveInCopies("schedule-livein-copies", cl::Hidden, cl::desc("Schedule copies of livein registers"), @@ -220,30 +229,6 @@ static void EmitLiveInCopy(MachineBasicBlock *MBB, } } -/// InsertLiveInDbgValue - Insert a DBG_VALUE instruction for each live-in -/// register that has a corresponding source information metadata. e.g. -/// function parameters. -static void InsertLiveInDbgValue(MachineBasicBlock *MBB, - MachineBasicBlock::iterator InsertPos, - unsigned LiveInReg, unsigned VirtReg, - const MachineRegisterInfo &MRI, - const TargetInstrInfo &TII) { - for (MachineRegisterInfo::use_iterator UI = MRI.use_begin(VirtReg), - UE = MRI.use_end(); UI != UE; ++UI) { - MachineInstr *UseMI = &*UI; - if (!UseMI->isDebugValue() || UseMI->getParent() != MBB) - continue; - // Found local dbg_value. FIXME: Verify it's not possible to have multiple - // dbg_value's which reference the vr in the same mbb. - uint64_t Offset = UseMI->getOperand(1).getImm(); - const MDNode *MDPtr = UseMI->getOperand(2).getMetadata(); - BuildMI(*MBB, InsertPos, InsertPos->getDebugLoc(), - TII.get(TargetOpcode::DBG_VALUE)) - .addReg(LiveInReg).addImm(Offset).addMetadata(MDPtr); - return; - } -} - /// EmitLiveInCopies - Emit copies to initialize livein virtual registers /// into the given entry block. void @@ -260,8 +245,6 @@ MachineRegisterInfo::EmitLiveInCopies(MachineBasicBlock *EntryMBB, const TargetRegisterClass *RC = getRegClass(LI->second); EmitLiveInCopy(EntryMBB, InsertPos, LI->second, LI->first, RC, CopyRegMap, *this, TRI, TII); - InsertLiveInDbgValue(EntryMBB, InsertPos, - LI->first, LI->second, *this, TII); } } else { // Emit the copies into the top of the block. @@ -273,8 +256,6 @@ MachineRegisterInfo::EmitLiveInCopies(MachineBasicBlock *EntryMBB, LI->second, LI->first, RC, RC); assert(Emitted && "Unable to issue a live-in copy instruction!\n"); (void) Emitted; - InsertLiveInDbgValue(EntryMBB, EntryMBB->begin(), - LI->first, LI->second, *this, TII); } } |