PPC: Fix constant pool overflow access in Get/SetRelocatedValue.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 019ca2217cb072d86137dfd5c690fd80502022c2..c0992c9171b4602a39e607fc843b48cc62152f4e 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -1367,6 +1367,10 @@ class MacroAssembler : public Assembler {
   // ---------------------------------------------------------------------------
   // Patching helpers.
 
+  // Decode offset from constant pool load instruction(s).
+  // Caller must place the instruction word at <location> in <result>.
+  void DecodeConstantPoolOffset(Register result, Register location);
+
   // Retrieve/patch the relocated value (lis/ori pair or constant pool load).
   void GetRelocatedValue(Register location, Register result, Register scratch);
   void SetRelocatedValue(Register location, Register scratch,