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Diffstat (limited to 'lib/CodeGen/ExactHazardRecognizer.h')
-rw-r--r-- | lib/CodeGen/ExactHazardRecognizer.h | 86 |
1 files changed, 0 insertions, 86 deletions
diff --git a/lib/CodeGen/ExactHazardRecognizer.h b/lib/CodeGen/ExactHazardRecognizer.h deleted file mode 100644 index 91c81a9..0000000 --- a/lib/CodeGen/ExactHazardRecognizer.h +++ /dev/null @@ -1,86 +0,0 @@ -//=- llvm/CodeGen/ExactHazardRecognizer.h - Scheduling Support -*- C++ -*-=// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements the ExactHazardRecognizer class, which -// implements hazard-avoidance heuristics for scheduling, based on the -// scheduling itineraries specified for the target. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_CODEGEN_EXACTHAZARDRECOGNIZER_H -#define LLVM_CODEGEN_EXACTHAZARDRECOGNIZER_H - -#include "llvm/CodeGen/ScheduleHazardRecognizer.h" -#include "llvm/CodeGen/ScheduleDAG.h" -#include "llvm/Target/TargetInstrItineraries.h" - -namespace llvm { - class ExactHazardRecognizer : public ScheduleHazardRecognizer { - // ScoreBoard to track function unit usage. ScoreBoard[0] is a - // mask of the FUs in use in the cycle currently being - // schedule. ScoreBoard[1] is a mask for the next cycle. The - // ScoreBoard is used as a circular buffer with the current cycle - // indicated by Head. - class ScoreBoard { - unsigned *Data; - - // The maximum number of cycles monitored by the Scoreboard. This - // value is determined based on the target itineraries to ensure - // that all hazards can be tracked. - size_t Depth; - // Indices into the Scoreboard that represent the current cycle. - size_t Head; - public: - ScoreBoard():Data(NULL), Depth(0), Head(0) { } - ~ScoreBoard() { - delete[] Data; - } - - size_t getDepth() const { return Depth; } - unsigned& operator[](size_t idx) const { - assert(Depth && "ScoreBoard was not initialized properly!"); - - return Data[(Head + idx) % Depth]; - } - - void reset(size_t d = 1) { - if (Data == NULL) { - Depth = d; - Data = new unsigned[Depth]; - } - - memset(Data, 0, Depth * sizeof(Data[0])); - Head = 0; - } - - void advance() { - Head = (Head + 1) % Depth; - } - - // Print the scoreboard. - void dump() const; - }; - - // Itinerary data for the target. - const InstrItineraryData &ItinData; - - ScoreBoard ReservedScoreboard; - ScoreBoard RequiredScoreboard; - - public: - ExactHazardRecognizer(const InstrItineraryData &ItinData); - - virtual HazardType getHazardType(SUnit *SU); - virtual void Reset(); - virtual void EmitInstruction(SUnit *SU); - virtual void AdvanceCycle(); - }; -} - -#endif |