Subzero. Uses fixups to calculate addend to relocations.

unittest/AssemblerX8664/TestUtil.h

Index: unittest/AssemblerX8664/TestUtil.h
diff --git a/unittest/AssemblerX8664/TestUtil.h b/unittest/AssemblerX8664/TestUtil.h
index 1c681312b15ea77635bf9020cfde0361b8e31db1..4600a9a0653814a4f3ca330f298c55bc018fb32b 100644
--- a/unittest/AssemblerX8664/TestUtil.h
+++ b/unittest/AssemblerX8664/TestUtil.h
@@ -913,8 +913,12 @@ protected:
     if (NeedsEpilogue) {
       addEpilogue();
     }
-
     NeedsEpilogue = false;
+
+    for (auto *Fixup : assembler()->fixups()) {
+      Fixup->emitOffset(assembler());
+    }
+
     return AssembledTest(codeBytes(), codeBytesSize(), NumAllocatedDwords);
   }