MIPS: Use JIC/JIALC offset when possible

src/mips/assembler-mips-inl.h

Index: src/mips/assembler-mips-inl.h
diff --git a/src/mips/assembler-mips-inl.h b/src/mips/assembler-mips-inl.h
index 963ed4acc90fc4cfcad73443947fed6a288f155b..bb64460f209579a66e050ca3604576a1823c5cc8 100644
--- a/src/mips/assembler-mips-inl.h
+++ b/src/mips/assembler-mips-inl.h
@@ -139,7 +139,13 @@ int RelocInfo::target_address_size() {
 
 
 Address Assembler::target_address_from_return_address(Address pc) {
-  return pc - kCallTargetAddressOffset;
+  if (IsMipsArchVariant(kMips32r6)) {
+    // We use another optimization that reduces one operation, this covers uses
+    // calling this function.
+    return pc - kCallTargetAddressOffset + kInstrSize;
+  } else {
+    return pc - kCallTargetAddressOffset;
+  }
 }