diff options
Diffstat (limited to 'lib/CodeGen/AntiDepBreaker.h')
| -rw-r--r-- | lib/CodeGen/AntiDepBreaker.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/lib/CodeGen/AntiDepBreaker.h b/lib/CodeGen/AntiDepBreaker.h index 086b757956..df47f984d5 100644 --- a/lib/CodeGen/AntiDepBreaker.h +++ b/lib/CodeGen/AntiDepBreaker.h @@ -30,6 +30,9 @@ namespace llvm { /// anti-dependencies. class AntiDepBreaker { public: + typedef std::vector<std::pair<MachineInstr *, MachineInstr *> > + DbgValueVector; + virtual ~AntiDepBreaker(); /// Start - Initialize anti-dep breaking for a new basic block. @@ -40,9 +43,10 @@ public: /// the number of anti-dependencies broken. /// virtual unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits, - MachineBasicBlock::iterator Begin, - MachineBasicBlock::iterator End, - unsigned InsertPosIndex) =0; + MachineBasicBlock::iterator Begin, + MachineBasicBlock::iterator End, + unsigned InsertPosIndex, + DbgValueVector &DbgValues) = 0; /// Observe - Update liveness information to account for the current /// instruction, which will not be scheduled. @@ -52,6 +56,14 @@ public: /// Finish - Finish anti-dep breaking for a basic block. virtual void FinishBlock() =0; + + /// UpdateDbgValue - Update DBG_VALUE if dependency breaker is updating + /// other machine instruction to use NewReg. + void UpdateDbgValue(MachineInstr *MI, unsigned OldReg, unsigned NewReg) { + assert (MI->isDebugValue() && "MI is not DBG_VALUE!"); + if (MI && MI->getOperand(0).isReg() && MI->getOperand(0).getReg() == OldReg) + MI->getOperand(0).setReg(NewReg); + } }; } |