Move Hydrogen and Lithium to src/crankshaft/

src/x64/lithium-gap-resolver-x64.cc

Index: src/x64/lithium-gap-resolver-x64.cc
diff --git a/src/x64/lithium-gap-resolver-x64.cc b/src/x64/lithium-gap-resolver-x64.cc
deleted file mode 100644
index ad4cb413426277c7288c9702de6d59f82de5682a..0000000000000000000000000000000000000000
--- a/src/x64/lithium-gap-resolver-x64.cc
+++ /dev/null
@@ -1,318 +0,0 @@
-// Copyright 2011 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#if V8_TARGET_ARCH_X64
-
-#include "src/x64/lithium-codegen-x64.h"
-#include "src/x64/lithium-gap-resolver-x64.h"
-
-namespace v8 {
-namespace internal {
-
-LGapResolver::LGapResolver(LCodeGen* owner)
-    : cgen_(owner), moves_(32, owner->zone()) {}
-
-
-void LGapResolver::Resolve(LParallelMove* parallel_move) {
-  DCHECK(moves_.is_empty());
-  // Build up a worklist of moves.
-  BuildInitialMoveList(parallel_move);
-
-  for (int i = 0; i < moves_.length(); ++i) {
-    LMoveOperands move = moves_[i];
-    // Skip constants to perform them last.  They don't block other moves
-    // and skipping such moves with register destinations keeps those
-    // registers free for the whole algorithm.
-    if (!move.IsEliminated() && !move.source()->IsConstantOperand()) {
-      PerformMove(i);
-    }
-  }
-
-  // Perform the moves with constant sources.
-  for (int i = 0; i < moves_.length(); ++i) {
-    if (!moves_[i].IsEliminated()) {
-      DCHECK(moves_[i].source()->IsConstantOperand());
-      EmitMove(i);
-    }
-  }
-
-  moves_.Rewind(0);
-}
-
-
-void LGapResolver::BuildInitialMoveList(LParallelMove* parallel_move) {
-  // Perform a linear sweep of the moves to add them to the initial list of
-  // moves to perform, ignoring any move that is redundant (the source is
-  // the same as the destination, the destination is ignored and
-  // unallocated, or the move was already eliminated).
-  const ZoneList<LMoveOperands>* moves = parallel_move->move_operands();
-  for (int i = 0; i < moves->length(); ++i) {
-    LMoveOperands move = moves->at(i);
-    if (!move.IsRedundant()) moves_.Add(move, cgen_->zone());
-  }
-  Verify();
-}
-
-
-void LGapResolver::PerformMove(int index) {
-  // Each call to this function performs a move and deletes it from the move
-  // graph.  We first recursively perform any move blocking this one.  We
-  // mark a move as "pending" on entry to PerformMove in order to detect
-  // cycles in the move graph.  We use operand swaps to resolve cycles,
-  // which means that a call to PerformMove could change any source operand
-  // in the move graph.
-
-  DCHECK(!moves_[index].IsPending());
-  DCHECK(!moves_[index].IsRedundant());
-
-  // Clear this move's destination to indicate a pending move.  The actual
-  // destination is saved in a stack-allocated local.  Recursion may allow
-  // multiple moves to be pending.
-  DCHECK(moves_[index].source() != NULL);  // Or else it will look eliminated.
-  LOperand* destination = moves_[index].destination();
-  moves_[index].set_destination(NULL);
-
-  // Perform a depth-first traversal of the move graph to resolve
-  // dependencies.  Any unperformed, unpending move with a source the same
-  // as this one's destination blocks this one so recursively perform all
-  // such moves.
-  for (int i = 0; i < moves_.length(); ++i) {
-    LMoveOperands other_move = moves_[i];
-    if (other_move.Blocks(destination) && !other_move.IsPending()) {
-      // Though PerformMove can change any source operand in the move graph,
-      // this call cannot create a blocking move via a swap (this loop does
-      // not miss any).  Assume there is a non-blocking move with source A
-      // and this move is blocked on source B and there is a swap of A and
-      // B.  Then A and B must be involved in the same cycle (or they would
-      // not be swapped).  Since this move's destination is B and there is
-      // only a single incoming edge to an operand, this move must also be
-      // involved in the same cycle.  In that case, the blocking move will
-      // be created but will be "pending" when we return from PerformMove.
-      PerformMove(i);
-    }
-  }
-
-  // We are about to resolve this move and don't need it marked as
-  // pending, so restore its destination.
-  moves_[index].set_destination(destination);
-
-  // This move's source may have changed due to swaps to resolve cycles and
-  // so it may now be the last move in the cycle.  If so remove it.
-  if (moves_[index].source()->Equals(destination)) {
-    moves_[index].Eliminate();
-    return;
-  }
-
-  // The move may be blocked on a (at most one) pending move, in which case
-  // we have a cycle.  Search for such a blocking move and perform a swap to
-  // resolve it.
-  for (int i = 0; i < moves_.length(); ++i) {
-    LMoveOperands other_move = moves_[i];
-    if (other_move.Blocks(destination)) {
-      DCHECK(other_move.IsPending());
-      EmitSwap(index);
-      return;
-    }
-  }
-
-  // This move is not blocked.
-  EmitMove(index);
-}
-
-
-void LGapResolver::Verify() {
-#ifdef ENABLE_SLOW_DCHECKS
-  // No operand should be the destination for more than one move.
-  for (int i = 0; i < moves_.length(); ++i) {
-    LOperand* destination = moves_[i].destination();
-    for (int j = i + 1; j < moves_.length(); ++j) {
-      SLOW_DCHECK(!destination->Equals(moves_[j].destination()));
-    }
-  }
-#endif
-}
-
-
-#define __ ACCESS_MASM(cgen_->masm())
-
-
-void LGapResolver::EmitMove(int index) {
-  LOperand* source = moves_[index].source();
-  LOperand* destination = moves_[index].destination();
-
-  // Dispatch on the source and destination operand kinds.  Not all
-  // combinations are possible.
-  if (source->IsRegister()) {
-    Register src = cgen_->ToRegister(source);
-    if (destination->IsRegister()) {
-      Register dst = cgen_->ToRegister(destination);
-      __ movp(dst, src);
-    } else {
-      DCHECK(destination->IsStackSlot());
-      Operand dst = cgen_->ToOperand(destination);
-      __ movp(dst, src);
-    }
-
-  } else if (source->IsStackSlot()) {
-    Operand src = cgen_->ToOperand(source);
-    if (destination->IsRegister()) {
-      Register dst = cgen_->ToRegister(destination);
-      __ movp(dst, src);
-    } else {
-      DCHECK(destination->IsStackSlot());
-      Operand dst = cgen_->ToOperand(destination);
-      __ movp(kScratchRegister, src);
-      __ movp(dst, kScratchRegister);
-    }
-
-  } else if (source->IsConstantOperand()) {
-    LConstantOperand* constant_source = LConstantOperand::cast(source);
-    if (destination->IsRegister()) {
-      Register dst = cgen_->ToRegister(destination);
-      if (cgen_->IsSmiConstant(constant_source)) {
-        __ Move(dst, cgen_->ToSmi(constant_source));
-      } else if (cgen_->IsInteger32Constant(constant_source)) {
-        int32_t constant = cgen_->ToInteger32(constant_source);
-        // Do sign extension only for constant used as de-hoisted array key.
-        // Others only need zero extension, which saves 2 bytes.
-        if (cgen_->IsDehoistedKeyConstant(constant_source)) {
-          __ Set(dst, constant);
-        } else {
-          __ Set(dst, static_cast<uint32_t>(constant));
-        }
-      } else {
-        __ Move(dst, cgen_->ToHandle(constant_source));
-      }
-    } else if (destination->IsDoubleRegister()) {
-      double v = cgen_->ToDouble(constant_source);
-      uint64_t int_val = bit_cast<uint64_t, double>(v);
-      XMMRegister dst = cgen_->ToDoubleRegister(destination);
-      if (int_val == 0) {
-        __ Xorpd(dst, dst);
-      } else {
-        __ Set(kScratchRegister, int_val);
-        __ Movq(dst, kScratchRegister);
-      }
-    } else {
-      DCHECK(destination->IsStackSlot());
-      Operand dst = cgen_->ToOperand(destination);
-      if (cgen_->IsSmiConstant(constant_source)) {
-        __ Move(dst, cgen_->ToSmi(constant_source));
-      } else if (cgen_->IsInteger32Constant(constant_source)) {
-        // Do sign extension to 64 bits when stored into stack slot.
-        __ movp(dst, Immediate(cgen_->ToInteger32(constant_source)));
-      } else {
-        __ Move(kScratchRegister, cgen_->ToHandle(constant_source));
-        __ movp(dst, kScratchRegister);
-      }
-    }
-
-  } else if (source->IsDoubleRegister()) {
-    XMMRegister src = cgen_->ToDoubleRegister(source);
-    if (destination->IsDoubleRegister()) {
-      __ Movapd(cgen_->ToDoubleRegister(destination), src);
-    } else {
-      DCHECK(destination->IsDoubleStackSlot());
-      __ Movsd(cgen_->ToOperand(destination), src);
-    }
-  } else if (source->IsDoubleStackSlot()) {
-    Operand src = cgen_->ToOperand(source);
-    if (destination->IsDoubleRegister()) {
-      __ Movsd(cgen_->ToDoubleRegister(destination), src);
-    } else {
-      DCHECK(destination->IsDoubleStackSlot());
-      __ Movsd(xmm0, src);
-      __ Movsd(cgen_->ToOperand(destination), xmm0);
-    }
-  } else {
-    UNREACHABLE();
-  }
-
-  moves_[index].Eliminate();
-}
-
-
-void LGapResolver::EmitSwap(int index) {
-  LOperand* source = moves_[index].source();
-  LOperand* destination = moves_[index].destination();
-
-  // Dispatch on the source and destination operand kinds.  Not all
-  // combinations are possible.
-  if (source->IsRegister() && destination->IsRegister()) {
-    // Swap two general-purpose registers.
-    Register src = cgen_->ToRegister(source);
-    Register dst = cgen_->ToRegister(destination);
-    __ xchgq(dst, src);
-
-  } else if ((source->IsRegister() && destination->IsStackSlot()) ||
-             (source->IsStackSlot() && destination->IsRegister())) {
-    // Swap a general-purpose register and a stack slot.
-    Register reg =
-        cgen_->ToRegister(source->IsRegister() ? source : destination);
-    Operand mem =
-        cgen_->ToOperand(source->IsRegister() ? destination : source);
-    __ movp(kScratchRegister, mem);
-    __ movp(mem, reg);
-    __ movp(reg, kScratchRegister);
-
-  } else if ((source->IsStackSlot() && destination->IsStackSlot()) ||
-      (source->IsDoubleStackSlot() && destination->IsDoubleStackSlot())) {
-    // Swap two stack slots or two double stack slots.
-    Operand src = cgen_->ToOperand(source);
-    Operand dst = cgen_->ToOperand(destination);
-    __ Movsd(xmm0, src);
-    __ movp(kScratchRegister, dst);
-    __ Movsd(dst, xmm0);
-    __ movp(src, kScratchRegister);
-
-  } else if (source->IsDoubleRegister() && destination->IsDoubleRegister()) {
-    // Swap two double registers.
-    XMMRegister source_reg = cgen_->ToDoubleRegister(source);
-    XMMRegister destination_reg = cgen_->ToDoubleRegister(destination);
-    __ Movapd(xmm0, source_reg);
-    __ Movapd(source_reg, destination_reg);
-    __ Movapd(destination_reg, xmm0);
-
-  } else if (source->IsDoubleRegister() || destination->IsDoubleRegister()) {
-    // Swap a double register and a double stack slot.
-    DCHECK((source->IsDoubleRegister() && destination->IsDoubleStackSlot()) ||
-           (source->IsDoubleStackSlot() && destination->IsDoubleRegister()));
-    XMMRegister reg = cgen_->ToDoubleRegister(source->IsDoubleRegister()
-                                                  ? source
-                                                  : destination);
-    LOperand* other = source->IsDoubleRegister() ? destination : source;
-    DCHECK(other->IsDoubleStackSlot());
-    Operand other_operand = cgen_->ToOperand(other);
-    __ Movapd(xmm0, reg);
-    __ Movsd(reg, other_operand);
-    __ Movsd(other_operand, xmm0);
-
-  } else {
-    // No other combinations are possible.
-    UNREACHABLE();
-  }
-
-  // The swap of source and destination has executed a move from source to
-  // destination.
-  moves_[index].Eliminate();
-
-  // Any unperformed (including pending) move with a source of either
-  // this move's source or destination needs to have their source
-  // changed to reflect the state of affairs after the swap.
-  for (int i = 0; i < moves_.length(); ++i) {
-    LMoveOperands other_move = moves_[i];
-    if (other_move.Blocks(source)) {
-      moves_[i].set_source(destination);
-    } else if (other_move.Blocks(destination)) {
-      moves_[i].set_source(source);
-    }
-  }
-}
-
-#undef __
-
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_TARGET_ARCH_X64