Move backend specific files to separate directories.

src/jump-target-ia32.cc

Index: src/jump-target-ia32.cc
diff --git a/src/jump-target-ia32.cc b/src/jump-target-ia32.cc
deleted file mode 100644
index a1049b265459b1ca4f243f3fb5168a4b59cbd043..0000000000000000000000000000000000000000
--- a/src/jump-target-ia32.cc
+++ /dev/null
@@ -1,335 +0,0 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "v8.h"
-
-#include "codegen-inl.h"
-#include "register-allocator-inl.h"
-
-namespace v8 { namespace internal {
-
-// -------------------------------------------------------------------------
-// JumpTarget implementation.
-
-#define __ ACCESS_MASM(masm_)
-
-void JumpTarget::DoJump() {
-  ASSERT(cgen_ != NULL);
-  ASSERT(cgen_->has_valid_frame());
-  // Live non-frame registers are not allowed at unconditional jumps
-  // because we have no way of invalidating the corresponding results
-  // which are still live in the C++ code.
-  ASSERT(cgen_->HasValidEntryRegisters());
-
-  if (is_bound()) {
-    // Backward jump.  There is an expected frame to merge to.
-    ASSERT(direction_ == BIDIRECTIONAL);
-    cgen_->frame()->MergeTo(entry_frame_);
-    cgen_->DeleteFrame();
-    __ jmp(&entry_label_);
-  } else {
-    // Forward jump.  The current frame is added to the end of the list
-    // of frames reaching the target block and a jump to the merge code
-    // is emitted.
-    AddReachingFrame(cgen_->frame());
-    RegisterFile empty;
-    cgen_->SetFrame(NULL, &empty);
-    __ jmp(&merge_labels_.last());
-  }
-
-  is_linked_ = !is_bound_;
-}
-
-
-void JumpTarget::DoBranch(Condition cc, Hint hint) {
-  ASSERT(cgen_ != NULL);
-  ASSERT(cgen_->has_valid_frame());
-
-  if (is_bound()) {
-    ASSERT(direction_ == BIDIRECTIONAL);
-    // Backward branch.  We have an expected frame to merge to on the
-    // backward edge.
-
-    // Swap the current frame for a copy (we do the swapping to get
-    // the off-frame registers off the fall through) to use for the
-    // branch.
-    VirtualFrame* fall_through_frame = cgen_->frame();
-    VirtualFrame* branch_frame = new VirtualFrame(fall_through_frame);
-    RegisterFile non_frame_registers = RegisterAllocator::Reserved();
-    cgen_->SetFrame(branch_frame, &non_frame_registers);
-
-    // Check if we can avoid merge code.
-    cgen_->frame()->PrepareMergeTo(entry_frame_);
-    if (cgen_->frame()->Equals(entry_frame_)) {
-      // Branch right in to the block.
-      cgen_->DeleteFrame();
-      __ j(cc, &entry_label_, hint);
-      cgen_->SetFrame(fall_through_frame, &non_frame_registers);
-      return;
-    }
-
-    // Check if we can reuse existing merge code.
-    for (int i = 0; i < reaching_frames_.length(); i++) {
-      if (reaching_frames_[i] != NULL &&
-          cgen_->frame()->Equals(reaching_frames_[i])) {
-        // Branch to the merge code.
-        cgen_->DeleteFrame();
-        __ j(cc, &merge_labels_[i], hint);
-        cgen_->SetFrame(fall_through_frame, &non_frame_registers);
-        return;
-      }
-    }
-
-    // To emit the merge code here, we negate the condition and branch
-    // around the merge code on the fall through path.
-    Label original_fall_through;
-    __ j(NegateCondition(cc), &original_fall_through, NegateHint(hint));
-    cgen_->frame()->MergeTo(entry_frame_);
-    cgen_->DeleteFrame();
-    __ jmp(&entry_label_);
-    cgen_->SetFrame(fall_through_frame, &non_frame_registers);
-    __ bind(&original_fall_through);
-
-  } else {
-    // Forward branch.  A copy of the current frame is added to the end
-    // of the list of frames reaching the target block and a branch to
-    // the merge code is emitted.
-    AddReachingFrame(new VirtualFrame(cgen_->frame()));
-    __ j(cc, &merge_labels_.last(), hint);
-    is_linked_ = true;
-  }
-}
-
-
-void JumpTarget::Call() {
-  // Call is used to push the address of the catch block on the stack as
-  // a return address when compiling try/catch and try/finally.  We
-  // fully spill the frame before making the call.  The expected frame
-  // at the label (which should be the only one) is the spilled current
-  // frame plus an in-memory return address.  The "fall-through" frame
-  // at the return site is the spilled current frame.
-  ASSERT(cgen_ != NULL);
-  ASSERT(cgen_->has_valid_frame());
-  // There are no non-frame references across the call.
-  ASSERT(cgen_->HasValidEntryRegisters());
-  ASSERT(!is_linked());
-
-  cgen_->frame()->SpillAll();
-  VirtualFrame* target_frame = new VirtualFrame(cgen_->frame());
-  target_frame->Adjust(1);
-  AddReachingFrame(target_frame);
-  __ call(&merge_labels_.last());
-
-  is_linked_ = !is_bound_;
-}
-
-
-void JumpTarget::DoBind(int mergable_elements) {
-  ASSERT(cgen_ != NULL);
-  ASSERT(!is_bound());
-
-  // Live non-frame registers are not allowed at the start of a basic
-  // block.
-  ASSERT(!cgen_->has_valid_frame() || cgen_->HasValidEntryRegisters());
-
-  if (direction_ == FORWARD_ONLY) {
-    // A simple case: no forward jumps and no possible backward jumps.
-    if (!is_linked()) {
-      // The stack pointer can be floating above the top of the
-      // virtual frame before the bind.  Afterward, it should not.
-      ASSERT(cgen_->has_valid_frame());
-      VirtualFrame* frame = cgen_->frame();
-      int difference =
-          frame->stack_pointer_ - (frame->elements_.length() - 1);
-      if (difference > 0) {
-        frame->stack_pointer_ -= difference;
-        __ add(Operand(esp), Immediate(difference * kPointerSize));
-      }
-
-      is_bound_ = true;
-      return;
-    }
-
-    // Another simple case: no fall through, a single forward jump,
-    // and no possible backward jumps.
-    if (!cgen_->has_valid_frame() && reaching_frames_.length() == 1) {
-      // Pick up the only reaching frame, take ownership of it, and
-      // use it for the block about to be emitted.
-      VirtualFrame* frame = reaching_frames_[0];
-      RegisterFile reserved = RegisterAllocator::Reserved();
-      cgen_->SetFrame(frame, &reserved);
-      reaching_frames_[0] = NULL;
-      __ bind(&merge_labels_[0]);
-
-      // The stack pointer can be floating above the top of the
-      // virtual frame before the bind.  Afterward, it should not.
-      int difference =
-          frame->stack_pointer_ - (frame->elements_.length() - 1);
-      if (difference > 0) {
-        frame->stack_pointer_ -= difference;
-        __ add(Operand(esp), Immediate(difference * kPointerSize));
-      }
-
-      is_linked_ = false;
-      is_bound_ = true;
-      return;
-    }
-  }
-
-  // If there is a current frame, record it as the fall-through.  It
-  // is owned by the reaching frames for now.
-  bool had_fall_through = false;
-  if (cgen_->has_valid_frame()) {
-    had_fall_through = true;
-    AddReachingFrame(cgen_->frame());
-    RegisterFile empty;
-    cgen_->SetFrame(NULL, &empty);
-  }
-
-  // Compute the frame to use for entry to the block.
-  ComputeEntryFrame(mergable_elements);
-
-  // Some moves required to merge to an expected frame require purely
-  // frame state changes, and do not require any code generation.
-  // Perform those first to increase the possibility of finding equal
-  // frames below.
-  for (int i = 0; i < reaching_frames_.length(); i++) {
-    if (reaching_frames_[i] != NULL) {
-      reaching_frames_[i]->PrepareMergeTo(entry_frame_);
-    }
-  }
-
-  if (is_linked()) {
-    // There were forward jumps.  Handle merging the reaching frames
-    // to the entry frame.
-
-    // Loop over the (non-null) reaching frames and process any that
-    // need merge code.  Iterate backwards through the list to handle
-    // the fall-through frame first.  Set frames that will be
-    // processed after 'i' to NULL if we want to avoid processing
-    // them.
-    for (int i = reaching_frames_.length() - 1; i >= 0; i--) {
-      VirtualFrame* frame = reaching_frames_[i];
-
-      if (frame != NULL) {
-        // Does the frame (probably) need merge code?
-        if (!frame->Equals(entry_frame_)) {
-          // We could have a valid frame as the fall through to the
-          // binding site or as the fall through from a previous merge
-          // code block.  Jump around the code we are about to
-          // generate.
-          if (cgen_->has_valid_frame()) {
-            cgen_->DeleteFrame();
-            __ jmp(&entry_label_);
-          }
-          // Pick up the frame for this block.  Assume ownership if
-          // there cannot be backward jumps.
-          RegisterFile reserved = RegisterAllocator::Reserved();
-          if (direction_ == BIDIRECTIONAL) {
-            cgen_->SetFrame(new VirtualFrame(frame), &reserved);
-          } else {
-            cgen_->SetFrame(frame, &reserved);
-            reaching_frames_[i] = NULL;
-          }
-          __ bind(&merge_labels_[i]);
-
-          // Loop over the remaining (non-null) reaching frames,
-          // looking for any that can share merge code with this one.
-          for (int j = 0; j < i; j++) {
-            VirtualFrame* other = reaching_frames_[j];
-            if (other != NULL && other->Equals(cgen_->frame())) {
-              // Set the reaching frame element to null to avoid
-              // processing it later, and then bind its entry label.
-              delete other;
-              reaching_frames_[j] = NULL;
-              __ bind(&merge_labels_[j]);
-            }
-          }
-
-          // Emit the merge code.
-          cgen_->frame()->MergeTo(entry_frame_);
-        } else if (i == reaching_frames_.length() - 1 && had_fall_through) {
-          // If this is the fall through frame, and it didn't need
-          // merge code, we need to pick up the frame so we can jump
-          // around subsequent merge blocks if necessary.
-          RegisterFile reserved = RegisterAllocator::Reserved();
-          cgen_->SetFrame(frame, &reserved);
-          reaching_frames_[i] = NULL;
-        }
-      }
-    }
-
-    // The code generator may not have a current frame if there was no
-    // fall through and none of the reaching frames needed merging.
-    // In that case, clone the entry frame as the current frame.
-    if (!cgen_->has_valid_frame()) {
-      RegisterFile reserved_registers = RegisterAllocator::Reserved();
-      cgen_->SetFrame(new VirtualFrame(entry_frame_), &reserved_registers);
-    }
-
-    // There is certainly a current frame equal to the entry frame.
-    // Bind the entry frame label.
-    __ bind(&entry_label_);
-
-    // There may be unprocessed reaching frames that did not need
-    // merge code.  They will have unbound merge labels.  Bind their
-    // merge labels to be the same as the entry label and deallocate
-    // them.
-    for (int i = 0; i < reaching_frames_.length(); i++) {
-      if (!merge_labels_[i].is_bound()) {
-        delete reaching_frames_[i];
-        reaching_frames_[i] = NULL;
-        __ bind(&merge_labels_[i]);
-      }
-    }
-
-    // There are non-NULL reaching frames with bound labels for each
-    // merge block, but only on backward targets.
-  } else {
-    // There were no forward jumps.  There must be a current frame and
-    // this must be a bidirectional target.
-    ASSERT(reaching_frames_.length() == 1);
-    ASSERT(reaching_frames_[0] != NULL);
-    ASSERT(direction_ == BIDIRECTIONAL);
-
-    // Use a copy of the reaching frame so the original can be saved
-    // for possible reuse as a backward merge block.
-    RegisterFile reserved = RegisterAllocator::Reserved();
-    cgen_->SetFrame(new VirtualFrame(reaching_frames_[0]), &reserved);
-    __ bind(&merge_labels_[0]);
-    cgen_->frame()->MergeTo(entry_frame_);
-    __ bind(&entry_label_);
-  }
-
-  is_linked_ = false;
-  is_bound_ = true;
-}
-
-#undef __
-
-
-} }  // namespace v8::internal