From e17232ee4de2f608f0e5d965368c2bc54b6c1e83 Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Tue, 22 Mar 2011 00:21:41 +0000 Subject: Dont emit 'DBG_VALUE %noreg, ...' to terminate user variable ranges. These ranges get completely jumbled by the post-ra scheduler, and it is not really reasonable to expect it to make sense of them. Instead, teach DwarfDebug to notice when user variables in registers are clobbered, and terminate the ranges there. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128045 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/LiveDebugVariables.cpp | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'lib/CodeGen/LiveDebugVariables.cpp') diff --git a/lib/CodeGen/LiveDebugVariables.cpp b/lib/CodeGen/LiveDebugVariables.cpp index 20e997ae37..900dc01327 100644 --- a/lib/CodeGen/LiveDebugVariables.cpp +++ b/lib/CodeGen/LiveDebugVariables.cpp @@ -101,10 +101,6 @@ class UserValue { void insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, unsigned LocNo, LiveIntervals &LIS, const TargetInstrInfo &TII); - /// insertDebugKill - Insert an undef DBG_VALUE into MBB at Idx. - void insertDebugKill(MachineBasicBlock *MBB, SlotIndex Idx, - LiveIntervals &LIS, const TargetInstrInfo &TII); - public: /// UserValue - Create a new UserValue. UserValue(const MDNode *var, unsigned o, DebugLoc L, @@ -752,13 +748,6 @@ void UserValue::insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, .addOperand(Loc).addImm(offset).addMetadata(variable); } -void UserValue::insertDebugKill(MachineBasicBlock *MBB, SlotIndex Idx, - LiveIntervals &LIS, const TargetInstrInfo &TII) { - MachineBasicBlock::iterator I = findInsertLocation(MBB, Idx, LIS); - BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE)).addReg(0) - .addImm(offset).addMetadata(variable); -} - void UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS, const TargetInstrInfo &TII) { MachineFunction::iterator MFEnd = VRM->getMachineFunction().end(); @@ -790,12 +779,6 @@ void UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS, break; ++I; - if (Stop == MBBEnd) - continue; - // The current interval ends before MBB. - // Insert a kill if there is a gap. - if (!I.valid() || I.start() > Stop) - insertDebugKill(MBB, Stop, LIS, TII); } } -- cgit v1.2.3