Subzero: Support multiple fixups in one instruction.

src/assembler.h

 //===- subzero/src/assembler.h - Integrated assembler -----------*- C++ -*-===//
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // Modified by the Subzero authors.
 //
 //===----------------------------------------------------------------------===//
 //
 //                        The Subzero Code Generator
@@ skipping 145 matching lines @@
   // When building the C++ tests, assertion code is enabled. To allow
   // asserting that the user of the assembler buffer has ensured the
   // capacity needed for emitting, we add a dummy method in non-debug mode.
   bool HasEnsuredCapacity() const { return true; }
 #endif // NDEBUG
 
   // Returns the position in the instruction stream.
   intptr_t GetPosition() const { return cursor_ - contents_; }
 
   // For bringup only.
-  AssemblerFixup *GetLatestFixup() const;
+  AssemblerFixup *GetLatestFixup(intptr_t position) const;
 
 private:
   // The limit is set to kMinimumGap bytes before the end of the data area.
   // This leaves enough space for the longest possible instruction and allows
   // for a single, fast space check per instruction.
   static const intptr_t kMinimumGap = 32;
 
   uintptr_t contents_;
   uintptr_t cursor_;
   uintptr_t limit_;
@@ skipping 49 matching lines @@
 
   virtual void BindCfgNodeLabel(SizeT NodeNumber) = 0;
 
 private:
   llvm::BumpPtrAllocator Allocator;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ASSEMBLER_H_