[interpreter] Remove OperandScale from front stages of pipeline.

src/interpreter/bytecode-array-writer.h

Index: src/interpreter/bytecode-array-writer.h
diff --git a/src/interpreter/bytecode-array-writer.h b/src/interpreter/bytecode-array-writer.h
index 696f13abb665817ac2a9eaf8887e43ccb4c94e1b..5595206a082a676674ba306016a7bfe079aced48 100644
--- a/src/interpreter/bytecode-array-writer.h
+++ b/src/interpreter/bytecode-array-writer.h
@@ -34,6 +34,15 @@ class BytecodeArrayWriter final : public BytecodePipelineStage {
       Handle<FixedArray> handler_table) override;
 
  private:
+  // Constants that act as placeholders for jump operands to be
+  // patched. These have operand sizes that match the sizes of
+  // reserved constant pool entries.
+  static const uint32_t k8BitPlaceholder = 0x7f;

[rmcilroy, 2016/06/07 10:32:46]

kJump8BitPlaceholder (and similar)

[oth, 2016/06/08 15:08:41]

Done.

+  static const uint32_t k16BitPlaceholder =
+      k8BitPlaceholder | (k8BitPlaceholder << 8);
+  static const uint32_t k32BitPlaceholder =
+      k16BitPlaceholder | (k16BitPlaceholder << 16);
+
   void PatchJump(size_t jump_target, size_t jump_location);
   void PatchJumpWith8BitOperand(size_t jump_location, int delta);
   void PatchJumpWith16BitOperand(size_t jump_location, int delta);