Port new version of ParallelMove's LGapResolver to X64.

src/ia32/lithium-gap-resolver-ia32.cc

 // Copyright 2011 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
@@ skipping 14 matching lines @@
 // (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 "ia32/lithium-gap-resolver-ia32.h"
 #include "ia32/lithium-codegen-ia32.h"
 
 namespace v8 {
 namespace internal {
 
 LGapResolver::LGapResolver(LCodeGen* owner)
-    : cgen_(owner), moves_(32), spilled_register_(-1) {
-  for (int i = 0; i < Register::kNumAllocatableRegisters; ++i) {
-    source_uses_[i] = 0;
-    destination_uses_[i] = 0;
-  }
-}
+    : cgen_(owner), moves_(32), source_uses_(), destination_uses_(),

[Kevin Millikin (Chromium), 2011/01/24 14:57:12]

I prefer treating the initializers like arguments in declarations (breaking one
per line if they don't all fit on one line):

    : cgen_(owner),
      moves_(32),
      source_uses_(),
      // ...

[William Hesse, 2011/01/26 10:05:57]

Done.

+      spilled_register_(-1) {}
 
 
 void LGapResolver::Resolve(LParallelMove* parallel_move) {
   ASSERT(HasBeenReset());
   // 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
@@ skipping 401 matching lines @@
     // Compute those counts now.
     source_uses_[source->index()] = CountSourceUses(source);
   } else if (destination->IsRegister()) {
     source_uses_[destination->index()] = CountSourceUses(destination);
   }
 }
 
 #undef __
 
 } }  // namespace v8::internal