diff options
Diffstat (limited to 'lib/CodeGen/AntiDepBreaker.h')
| -rw-r--r-- | lib/CodeGen/AntiDepBreaker.h | 24 |
1 files changed, 10 insertions, 14 deletions
diff --git a/lib/CodeGen/AntiDepBreaker.h b/lib/CodeGen/AntiDepBreaker.h index df47f98..a61a8ef 100644 --- a/lib/CodeGen/AntiDepBreaker.h +++ b/lib/CodeGen/AntiDepBreaker.h @@ -12,8 +12,8 @@ // //===----------------------------------------------------------------------===// -#ifndef LLVM_CODEGEN_ANTIDEPBREAKER_H -#define LLVM_CODEGEN_ANTIDEPBREAKER_H +#ifndef LLVM_LIB_CODEGEN_ANTIDEPBREAKER_H +#define LLVM_LIB_CODEGEN_ANTIDEPBREAKER_H #include "llvm/CodeGen/MachineBasicBlock.h" #include "llvm/CodeGen/MachineFrameInfo.h" @@ -25,9 +25,8 @@ namespace llvm { -/// AntiDepBreaker - This class works into conjunction with the -/// post-RA scheduler to rename registers to break register -/// anti-dependencies. +/// This class works in conjunction with the post-RA scheduler to rename +/// registers to break register anti-dependencies (WAR hazards). class AntiDepBreaker { public: typedef std::vector<std::pair<MachineInstr *, MachineInstr *> > @@ -35,29 +34,26 @@ public: virtual ~AntiDepBreaker(); - /// Start - Initialize anti-dep breaking for a new basic block. + /// Initialize anti-dep breaking for a new basic block. virtual void StartBlock(MachineBasicBlock *BB) =0; - /// BreakAntiDependencies - Identifiy anti-dependencies within a - /// basic-block region and break them by renaming registers. Return - /// the number of anti-dependencies broken. - /// + /// Identifiy anti-dependencies within a basic-block region and break them by + /// renaming registers. Return the number of anti-dependencies broken. virtual unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits, MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned InsertPosIndex, DbgValueVector &DbgValues) = 0; - /// Observe - Update liveness information to account for the current + /// Update liveness information to account for the current /// instruction, which will not be scheduled. - /// virtual void Observe(MachineInstr *MI, unsigned Count, unsigned InsertPosIndex) =0; - /// Finish - Finish anti-dep breaking for a basic block. + /// Finish anti-dep breaking for a basic block. virtual void FinishBlock() =0; - /// UpdateDbgValue - Update DBG_VALUE if dependency breaker is updating + /// 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!"); |