Remove some old experimental code that is no longer needed. Remove additional, speculative scheduling pass as its cost did not translate into significant performance improvement. Minor tweaks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89471 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AggressiveAntiDepBreaker.h b/lib/CodeGen/AggressiveAntiDepBreaker.h
index 543c102..8154d2d 100644
--- a/lib/CodeGen/AggressiveAntiDepBreaker.h
+++ b/lib/CodeGen/AggressiveAntiDepBreaker.h
@@ -27,12 +27,11 @@
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/SmallSet.h"
+#include <map>
namespace llvm {
/// Class AggressiveAntiDepState
- /// Contains all the state necessary for anti-dep breaking. We place
- /// into a separate class so be can conveniently save/restore it to
- /// enable multi-pass anti-dep breaking.
+ /// Contains all the state necessary for anti-dep breaking.
class AggressiveAntiDepState {
public:
/// RegisterReference - Information about a register reference
@@ -126,23 +125,11 @@
/// registers.
AggressiveAntiDepState *State;
- /// SavedState - The state for the start of an anti-dep
- /// region. Used to restore the state at the beginning of each
- /// pass
- AggressiveAntiDepState *SavedState;
-
public:
AggressiveAntiDepBreaker(MachineFunction& MFi,
TargetSubtarget::RegClassVector& CriticalPathRCs);
~AggressiveAntiDepBreaker();
- /// GetMaxTrials - As anti-dependencies are broken, additional
- /// dependencies may be exposed, so multiple passes are required.
- unsigned GetMaxTrials();
-
- /// NeedCandidates - Candidates required.
- bool NeedCandidates() { return true; }
-
/// Start - Initialize anti-dep breaking for a new basic block.
void StartBlock(MachineBasicBlock *BB);
@@ -150,7 +137,6 @@
/// of the ScheduleDAG and break them by renaming registers.
///
unsigned BreakAntiDependencies(std::vector<SUnit>& SUnits,
- CandidateMap& Candidates,
MachineBasicBlock::iterator& Begin,
MachineBasicBlock::iterator& End,
unsigned InsertPosIndex);