diff --git a/llvm/lib/Target/BPF/MCTargetDesc/BPFAsmBackend.cpp b/llvm/lib/Target/BPF/MCTargetDesc/BPFAsmBackend.cpp
--- a/llvm/lib/Target/BPF/MCTargetDesc/BPFAsmBackend.cpp
+++ b/llvm/lib/Target/BPF/MCTargetDesc/BPFAsmBackend.cpp
@@ -87,6 +87,9 @@
     }
   } else {
     assert(Fixup.getKind() == FK_PCRel_2);
+    assert(((int64_t)Value - 8) <= INT16_MAX * 8 &&
+           ((int64_t)Value - 8) >= INT16_MIN * 8);
+
     Value = (uint16_t)((Value - 8) / 8);
     support::endian::write<uint16_t>(&Data[Fixup.getOffset() + 2], Value,
                                      Endian);