Update DBG_VALUEs while breaking anti dependencies.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132487 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AntiDepBreaker.h b/lib/CodeGen/AntiDepBreaker.h
index 086b757..df47f98 100644
--- a/lib/CodeGen/AntiDepBreaker.h
+++ b/lib/CodeGen/AntiDepBreaker.h
@@ -30,6 +30,9 @@
/// 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 @@
/// 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 @@
/// 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);
+ }
};
}