Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 257 deletions

diff --git a/gnu/llvm/lib/Target/MSP430/MSP430BranchSelector.cpp b/gnu/llvm/lib/Target/MSP430/MSP430BranchSelector.cpp
deleted file mode 100644
index 2b349540554..00000000000
--- a/gnu/llvm/lib/Target/MSP430/MSP430BranchSelector.cpp
+++ /dev/null
@@ -1,257 +0,0 @@
-//===-- MSP430BranchSelector.cpp - Emit long conditional branches ---------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains a pass that scans a machine function to determine which
-// conditional branches need more than 10 bits of displacement to reach their
-// target basic block.  It does this in two passes; a calculation of basic block
-// positions pass, and a branch pseudo op to machine branch opcode pass.  This
-// pass should be run last, just before the assembly printer.
-//
-//===----------------------------------------------------------------------===//
-
-#include "MSP430.h"
-#include "MSP430InstrInfo.h"
-#include "MSP430Subtarget.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstrBuilder.h"
-#include "llvm/Support/MathExtras.h"
-#include "llvm/Target/TargetMachine.h"
-using namespace llvm;
-
-#define DEBUG_TYPE "msp430-branch-select"
-
-static cl::opt<bool>
-    BranchSelectEnabled("msp430-branch-select", cl::Hidden, cl::init(true),
-                        cl::desc("Expand out of range branches"));
-
-STATISTIC(NumSplit, "Number of machine basic blocks split");
-STATISTIC(NumExpanded, "Number of branches expanded to long format");
-
-namespace {
-class MSP430BSel : public MachineFunctionPass {
-
-  typedef SmallVector<int, 16> OffsetVector;
-
-  MachineFunction *MF;
-  const MSP430InstrInfo *TII;
-
-  unsigned measureFunction(OffsetVector &BlockOffsets,
-                           MachineBasicBlock *FromBB = nullptr);
-  bool expandBranches(OffsetVector &BlockOffsets);
-
-public:
-  static char ID;
-  MSP430BSel() : MachineFunctionPass(ID) {}
-
-  bool runOnMachineFunction(MachineFunction &MF) override;
-
-  MachineFunctionProperties getRequiredProperties() const override {
-    return MachineFunctionProperties().set(
-        MachineFunctionProperties::Property::NoVRegs);
-  }
-
-  StringRef getPassName() const override { return "MSP430 Branch Selector"; }
-};
-char MSP430BSel::ID = 0;
-}
-
-static bool isInRage(int DistanceInBytes) {
-  // According to CC430 Family User's Guide, Section 4.5.1.3, branch
-  // instructions have the signed 10-bit word offset field, so first we need to
-  // convert the distance from bytes to words, then check if it fits in 10-bit
-  // signed integer.
-  const int WordSize = 2;
-
-  assert((DistanceInBytes % WordSize == 0) &&
-         "Branch offset should be word aligned!");
-
-  int Words = DistanceInBytes / WordSize;
-  return isInt<10>(Words);
-}
-
-/// Measure each basic block, fill the BlockOffsets, and return the size of
-/// the function, starting with BB
-unsigned MSP430BSel::measureFunction(OffsetVector &BlockOffsets,
-                                     MachineBasicBlock *FromBB) {
-  // Give the blocks of the function a dense, in-order, numbering.
-  MF->RenumberBlocks(FromBB);
-
-  MachineFunction::iterator Begin;
-  if (FromBB == nullptr) {
-    Begin = MF->begin();
-  } else {
-    Begin = FromBB->getIterator();
-  }
-
-  BlockOffsets.resize(MF->getNumBlockIDs());
-
-  unsigned TotalSize = BlockOffsets[Begin->getNumber()];
-  for (auto &MBB : make_range(Begin, MF->end())) {
-    BlockOffsets[MBB.getNumber()] = TotalSize;
-    for (MachineInstr &MI : MBB) {
-      TotalSize += TII->getInstSizeInBytes(MI);
-    }
-  }
-  return TotalSize;
-}
-
-/// Do expand branches and split the basic blocks if necessary.
-/// Returns true if made any change.
-bool MSP430BSel::expandBranches(OffsetVector &BlockOffsets) {
-  // For each conditional branch, if the offset to its destination is larger
-  // than the offset field allows, transform it into a long branch sequence
-  // like this:
-  //   short branch:
-  //     bCC MBB
-  //   long branch:
-  //     b!CC $PC+6
-  //     b MBB
-  //
-  bool MadeChange = false;
-  for (auto MBB = MF->begin(), E = MF->end(); MBB != E; ++MBB) {
-    unsigned MBBStartOffset = 0;
-    for (auto MI = MBB->begin(), EE = MBB->end(); MI != EE; ++MI) {
-      MBBStartOffset += TII->getInstSizeInBytes(*MI);
-
-      // If this instruction is not a short branch then skip it.
-      if (MI->getOpcode() != MSP430::JCC && MI->getOpcode() != MSP430::JMP) {
-        continue;
-      }
-
-      MachineBasicBlock *DestBB = MI->getOperand(0).getMBB();
-      // Determine the distance from the current branch to the destination
-      // block. MBBStartOffset already includes the size of the current branch
-      // instruction.
-      int BlockDistance =
-          BlockOffsets[DestBB->getNumber()] - BlockOffsets[MBB->getNumber()];
-      int BranchDistance = BlockDistance - MBBStartOffset;
-
-      // If this branch is in range, ignore it.
-      if (isInRage(BranchDistance)) {
-        continue;
-      }
-
-      LLVM_DEBUG(dbgs() << "  Found a branch that needs expanding, "
-                        << printMBBReference(*DestBB) << ", Distance "
-                        << BranchDistance << "\n");
-
-      // If JCC is not the last instruction we need to split the MBB.
-      if (MI->getOpcode() == MSP430::JCC && std::next(MI) != EE) {
-
-        LLVM_DEBUG(dbgs() << "  Found a basic block that needs to be split, "
-                          << printMBBReference(*MBB) << "\n");
-
-        // Create a new basic block.
-        MachineBasicBlock *NewBB =
-            MF->CreateMachineBasicBlock(MBB->getBasicBlock());
-        MF->insert(std::next(MBB), NewBB);
-
-        // Splice the instructions following MI over to the NewBB.
-        NewBB->splice(NewBB->end(), &*MBB, std::next(MI), MBB->end());
-
-        // Update the successor lists.
-        for (MachineBasicBlock *Succ : MBB->successors()) {
-          if (Succ == DestBB) {
-            continue;
-          }
-          MBB->replaceSuccessor(Succ, NewBB);
-          NewBB->addSuccessor(Succ);
-        }
-
-        // We introduced a new MBB so all following blocks should be numbered
-        // and measured again.
-        measureFunction(BlockOffsets, &*MBB);
-
-        ++NumSplit;
-
-        // It may be not necessary to start all over at this point, but it's
-        // safer do this anyway.
-        return true;
-      }
-
-      MachineInstr &OldBranch = *MI;
-      DebugLoc dl = OldBranch.getDebugLoc();
-      int InstrSizeDiff = -TII->getInstSizeInBytes(OldBranch);
-
-      if (MI->getOpcode() == MSP430::JCC) {
-        MachineBasicBlock *NextMBB = &*std::next(MBB);
-        assert(MBB->isSuccessor(NextMBB) &&
-               "This block must have a layout successor!");
-
-        // The BCC operands are:
-        // 0. Target MBB
-        // 1. MSP430 branch predicate
-        SmallVector<MachineOperand, 1> Cond;
-        Cond.push_back(MI->getOperand(1));
-
-        // Jump over the long branch on the opposite condition
-        TII->reverseBranchCondition(Cond);
-        MI = BuildMI(*MBB, MI, dl, TII->get(MSP430::JCC))
-                 .addMBB(NextMBB)
-                 .add(Cond[0]);
-        InstrSizeDiff += TII->getInstSizeInBytes(*MI);
-        ++MI;
-      }
-
-      // Unconditional branch to the real destination.
-      MI = BuildMI(*MBB, MI, dl, TII->get(MSP430::Bi)).addMBB(DestBB);
-      InstrSizeDiff += TII->getInstSizeInBytes(*MI);
-
-      // Remove the old branch from the function.
-      OldBranch.eraseFromParent();
-
-      // The size of a new instruction is different from the old one, so we need
-      // to correct all block offsets.
-      for (int i = MBB->getNumber() + 1, e = BlockOffsets.size(); i < e; ++i) {
-        BlockOffsets[i] += InstrSizeDiff;
-      }
-      MBBStartOffset += InstrSizeDiff;
-
-      ++NumExpanded;
-      MadeChange = true;
-    }
-  }
-  return MadeChange;
-}
-
-bool MSP430BSel::runOnMachineFunction(MachineFunction &mf) {
-  MF = &mf;
-  TII = static_cast<const MSP430InstrInfo *>(MF->getSubtarget().getInstrInfo());
-
-  // If the pass is disabled, just bail early.
-  if (!BranchSelectEnabled)
-    return false;
-
-  LLVM_DEBUG(dbgs() << "\n********** " << getPassName() << " **********\n");
-
-  // BlockOffsets - Contains the distance from the beginning of the function to
-  // the beginning of each basic block.
-  OffsetVector BlockOffsets;
-
-  unsigned FunctionSize = measureFunction(BlockOffsets);
-  // If the entire function is smaller than the displacement of a branch field,
-  // we know we don't need to expand any branches in this
-  // function. This is a common case.
-  if (isInRage(FunctionSize)) {
-    return false;
-  }
-
-  // Iteratively expand branches until we reach a fixed point.
-  bool MadeChange = false;
-  while (expandBranches(BlockOffsets))
-    MadeChange = true;
-
-  return MadeChange;
-}
-
-/// Returns an instance of the Branch Selection Pass
-FunctionPass *llvm::createMSP430BranchSelectionPass() {
-  return new MSP430BSel();
-}