MIPS: Use movw/movt instead of constant pool on ARMv7.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index 6ee21c232e31d8f35341985e555bcf2761daf4aa..59c45c927acdcb2fd809d3b67a73bb8789f13bd5 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -574,6 +574,10 @@ class Assembler : public AssemblerBase {
   static Address target_address_at(Address pc);
   static void set_target_address_at(Address pc, Address target);
 
+  // Return the code target address at a call site from the return address
+  // of that call in the instruction stream.
+  inline static Address target_address_from_return_address(Address pc);
+
   static void JumpLabelToJumpRegister(Address pc);
 
   static void QuietNaN(HeapObject* nan);
@@ -634,6 +638,8 @@ class Assembler : public AssemblerBase {
   // register.
   static const int kPcLoadDelta = 4;
 
+  static const int kPatchDebugBreakSlotReturnOffset = 4 * kInstrSize;
+
   // Number of instructions used for the JS return sequence. The constant is
   // used by the debugger to patch the JS return sequence.
   static const int kJSReturnSequenceInstructions = 7;