Move backend specific files to separate directories.

src/ia32/register-allocator-ia32.cc

Index: src/ia32/register-allocator-ia32.cc
diff --git a/src/ia32/register-allocator-ia32.cc b/src/ia32/register-allocator-ia32.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a8988274882b848bbe30983fccffdaac5bcbf5d3
--- /dev/null
+++ b/src/ia32/register-allocator-ia32.cc
@@ -0,0 +1,130 @@
+// 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 {
+
+// -------------------------------------------------------------------------
+// Result implementation.
+
+void Result::ToRegister() {
+  ASSERT(is_valid());
+  if (is_constant()) {
+    Result fresh = cgen_->allocator()->Allocate();
+    ASSERT(fresh.is_valid());
+    if (cgen_->IsUnsafeSmi(handle())) {
+      cgen_->LoadUnsafeSmi(fresh.reg(), handle());
+    } else {
+      cgen_->masm()->Set(fresh.reg(), Immediate(handle()));
+    }
+    // This result becomes a copy of the fresh one.
+    *this = fresh;
+  }
+  ASSERT(is_register());
+}
+
+
+void Result::ToRegister(Register target) {
+  ASSERT(is_valid());
+  if (!is_register() || !reg().is(target)) {
+    Result fresh = cgen_->allocator()->Allocate(target);
+    ASSERT(fresh.is_valid());
+    if (is_register()) {
+      cgen_->masm()->mov(fresh.reg(), reg());
+    } else {
+      ASSERT(is_constant());
+      if (cgen_->IsUnsafeSmi(handle())) {
+        cgen_->LoadUnsafeSmi(fresh.reg(), handle());
+      } else {
+        cgen_->masm()->Set(fresh.reg(), Immediate(handle()));
+      }
+    }
+    *this = fresh;
+  } else if (is_register() && reg().is(target)) {
+    ASSERT(cgen_->has_valid_frame());
+    cgen_->frame()->Spill(target);
+    ASSERT(cgen_->allocator()->count(target) == 1);
+  }
+  ASSERT(is_register());
+  ASSERT(reg().is(target));
+}
+
+
+// -------------------------------------------------------------------------
+// RegisterAllocator implementation.
+
+RegisterFile RegisterAllocator::Reserved() {
+  RegisterFile reserved;
+  reserved.Use(esp);
+  reserved.Use(ebp);
+  reserved.Use(esi);
+  return reserved;
+}
+
+
+void RegisterAllocator::UnuseReserved(RegisterFile* register_file) {
+  register_file->ref_counts_[esp.code()] = 0;
+  register_file->ref_counts_[ebp.code()] = 0;
+  register_file->ref_counts_[esi.code()] = 0;
+}
+
+
+void RegisterAllocator::Initialize() {
+  Reset();
+  // The following register is live on function entry, saved in the
+  // frame, and available for allocation during execution.
+  Use(edi);  // JS function.
+}
+
+
+void RegisterAllocator::Reset() {
+  registers_.Reset();
+  // The following registers are live on function entry and reserved
+  // during execution.
+  Use(esp);  // Stack pointer.
+  Use(ebp);  // Frame pointer (caller's frame pointer on entry).
+  Use(esi);  // Context (callee's context on entry).
+}
+
+
+Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
+  Result result = AllocateWithoutSpilling();
+  // Check that the register is a byte register.  If not, unuse the
+  // register if valid and return an invalid result.
+  if (result.is_valid() && !result.reg().is_byte_register()) {
+    result.Unuse();
+    return Result(cgen_);
+  }
+  return result;
+}
+
+
+} }  // namespace v8::internal