Revert r332579 "[llvm-exegesis] Update to cover latency through another opcode."

The revision failed to update the ARM tests.

llvm-svn: 332580

1 files changed, 0 insertions, 107 deletions

diff --git a/llvm/tools/llvm-exegesis/lib/RegisterAliasing.h b/llvm/tools/llvm-exegesis/lib/RegisterAliasing.h
deleted file mode 100644
index 3387adf01b7..00000000000
--- a/llvm/tools/llvm-exegesis/lib/RegisterAliasing.h
+++ /dev/null
@@ -1,107 +0,0 @@
-//===-- RegisterAliasingTracker.h -------------------------------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// Defines classes to keep track of register aliasing.
-///
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TOOLS_LLVM_EXEGESIS_ALIASINGTRACKER_H
-#define LLVM_TOOLS_LLVM_EXEGESIS_ALIASINGTRACKER_H
-
-#include <memory>
-#include <unordered_map>
-
-#include "llvm/ADT/BitVector.h"
-#include "llvm/ADT/PackedVector.h"
-#include "llvm/MC/MCRegisterInfo.h"
-
-namespace exegesis {
-
-// Returns the registers that are aliased by the ones set in SourceBits.
-llvm::BitVector getAliasedBits(const llvm::MCRegisterInfo &RegInfo,
-                               const llvm::BitVector &SourceBits);
-
-// Keeps track of a mapping from one register (or a register class) to its
-// aliased registers.
-//
-// e.g.
-// RegisterAliasingTracker Tracker(RegInfo, llvm::X86::EAX);
-// Tracker.sourceBits() == { llvm::X86::EAX }
-// Tracker.aliasedBits() == { llvm::X86::AL, llvm::X86::AH, llvm::X86::AX,
-//                            llvm::X86::EAX,llvm::X86::HAX, llvm::X86::RAX }
-// Tracker.getOrigin(llvm::X86::AL) == llvm::X86::EAX;
-// Tracker.getOrigin(llvm::X86::BX) == -1;
-struct RegisterAliasingTracker {
-  // Construct a tracker from an MCRegisterClass.
-  RegisterAliasingTracker(const llvm::MCRegisterInfo &RegInfo,
-                          const llvm::BitVector &ReservedReg,
-                          const llvm::MCRegisterClass &RegClass);
-
-  // Construct a tracker from an MCPhysReg.
-  RegisterAliasingTracker(const llvm::MCRegisterInfo &RegInfo,
-                          const llvm::MCPhysReg Register);
-
-  const llvm::BitVector &sourceBits() const { return SourceBits; }
-
-  // Retrieves all the touched registers as a BitVector.
-  const llvm::BitVector &aliasedBits() const { return AliasedBits; }
-
-  // Returns the origin of this register or -1.
-  int getOrigin(llvm::MCPhysReg Aliased) const {
-    if (!AliasedBits[Aliased])
-      return -1;
-    return Origins[Aliased];
-  }
-
-private:
-  RegisterAliasingTracker(const llvm::MCRegisterInfo &RegInfo);
-
-  void FillOriginAndAliasedBits(const llvm::MCRegisterInfo &RegInfo,
-                                const llvm::BitVector &OriginalBits);
-
-  llvm::BitVector SourceBits;
-  llvm::BitVector AliasedBits;
-  llvm::PackedVector<size_t, 10> Origins; // Max 1024 physical registers.
-};
-
-// A cache of existing trackers.
-struct RegisterAliasingTrackerCache {
-  // RegInfo must outlive the cache.
-  RegisterAliasingTrackerCache(const llvm::MCRegisterInfo &RegInfo,
-                               const llvm::BitVector &ReservedReg);
-
-  // Convenient function to retrieve a BitVector of the right size.
-  const llvm::BitVector &emptyRegisters() const { return EmptyRegisters; }
-
-  // Convenient function to retrieve the registers the function body can't use.
-  const llvm::BitVector &reservedRegisters() const { return ReservedReg; }
-
-  // Convenient function to retrieve the underlying MCRegInfo.
-  const llvm::MCRegisterInfo &regInfo() const { return RegInfo; }
-
-  // Retrieves the RegisterAliasingTracker for this particular register.
-  const RegisterAliasingTracker &getRegister(llvm::MCPhysReg Reg);
-
-  // Retrieves the RegisterAliasingTracker for this particular register class.
-  const RegisterAliasingTracker &getRegisterClass(unsigned RegClassIndex);
-
-private:
-  const llvm::MCRegisterInfo &RegInfo;
-  const llvm::BitVector ReservedReg;
-  const llvm::BitVector EmptyRegisters;
-  std::unordered_map<unsigned, std::unique_ptr<RegisterAliasingTracker>>
-      Registers;
-  std::unordered_map<unsigned, std::unique_ptr<RegisterAliasingTracker>>
-      RegisterClasses;
-};
-
-} // namespace exegesis
-
-#endif // LLVM_TOOLS_LLVM_EXEGESIS_ALIASINGTRACKER_H