[Turbofan] Add concept of FP register aliasing on ARM 32.

src/compiler/gap-resolver.h

Index: src/compiler/gap-resolver.h
diff --git a/src/compiler/gap-resolver.h b/src/compiler/gap-resolver.h
index 19806f568a82faf27b5d6e60f12b195d1bed5208..fc48b2b98376fb80ae03935167a476fce52cef29 100644
--- a/src/compiler/gap-resolver.h
+++ b/src/compiler/gap-resolver.h
@@ -26,18 +26,21 @@ class GapResolver final {
                               InstructionOperand* destination) = 0;
   };
 
-  explicit GapResolver(Assembler* assembler) : assembler_(assembler) {}
+  explicit GapResolver(Assembler* assembler)
+      : assembler_(assembler), split_rep_(MachineRepresentation::kSimd128) {}
 
   // Resolve a set of parallel moves, emitting assembler instructions.
-  void Resolve(ParallelMove* parallel_move) const;
+  void Resolve(ParallelMove* parallel_move);
 
  private:
-  // Perform the given move, possibly requiring other moves to satisfy
-  // dependencies.
-  void PerformMove(ParallelMove* moves, MoveOperands* move) const;
+  // Performs the given move, possibly performing other moves to unblock the
+  // destination operand.
+  void PerformMove(ParallelMove* moves, MoveOperands* move);
 
   // Assembler used to emit moves and save registers.
   Assembler* const assembler_;
+
+  MachineRepresentation split_rep_;

[Jarin, 2016/10/18 11:44:28]

Please, describe what this field means.

[bbudge, 2016/10/19 00:32:20]

Done.

 };
 
 }  // namespace compiler