Index: llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
===================================================================
--- llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
+++ llvm/lib/DebugInfo/DWARF/DWARFFormValue.cpp
@@ -481,12 +481,12 @@
     break;
   case DW_FORM_strp:
     if (DumpOpts.Verbose)
-      OS << format(" .debug_str[0x%8.8x] = ", (uint32_t)UValue);
+      OS << format(" .debug_str[0x%8.8" PRIx64 "] = ", UValue);
     dumpString(OS);
     break;
   case DW_FORM_line_strp:
     if (DumpOpts.Verbose)
-      OS << format(" .debug_line_str[0x%8.8x] = ", (uint32_t)UValue);
+      OS << format(" .debug_line_str[0x%8.8" PRIx64 "] = ", UValue);
     dumpString(OS);
     break;
   case DW_FORM_strx:
@@ -550,9 +550,8 @@
     OS << format("indexed (0x%x) loclist = ", (uint32_t)UValue);
     break;
 
-  // Should be formatted to 64-bit for DWARF64.
   case DW_FORM_sec_offset:
-    AddrOS << format("0x%08x", (uint32_t)UValue);
+    AddrOS << format("0x%08" PRIx64, UValue);
     break;
 
   default:
Index: llvm/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp
===================================================================
--- llvm/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp
+++ llvm/unittests/DebugInfo/DWARF/DWARFFormValueTest.cpp
@@ -339,4 +339,60 @@
         ErrorParams{DW_FORM_strp_sup, {}},
         ErrorParams{DW_FORM_ref_sig8, {}}), );
 
+using DumpValueParams =
+    std::tuple<Form, ArrayRef<uint8_t>, DwarfFormat, StringRef>;
+struct DumpValueFixture : public testing::TestWithParam<DumpValueParams> {
+  void SetUp() override {
+    std::tie(Fm, InitialData, Format, ExpectedResult) = GetParam();
+  }
+
+  Form Fm;
+  ArrayRef<uint8_t> InitialData;
+  DwarfFormat Format;
+  StringRef ExpectedResult;
+};
+
+TEST_P(DumpValueFixture, Test) {
+  SCOPED_TRACE(formatv("Fm = {0}, InitialData = [{1}], Format = {2}", Fm,
+                       toHex(InitialData),
+                       Format == DWARF64 ? "DWARF64" : "DWARF32"));
+  DWARFDataExtractor Data(InitialData, sys::IsLittleEndianHost, 8);
+  DWARFFormValue Form(Fm);
+  uint64_t Offset = 0;
+  Form.extractValue(Data, &Offset, {0, 0, Format});
+
+  std::string Output;
+  raw_string_ostream OS(Output);
+
+  DIDumpOptions Opts;
+  Opts.Verbose = true;
+  Opts.ShowAddresses = true;
+
+  Form.dump(OS, Opts);
+  OS.flush();
+
+  EXPECT_EQ(Output, ExpectedResult);
+}
+
+const uint32_t DumpTestSample32Val = 0x112233;
+ArrayRef<uint8_t> DumpTestSample32 = toBytes(DumpTestSample32Val);
+const uint64_t DumpTestSample64Val = 0x11223344556677;
+ArrayRef<uint8_t> DumpTestSample64 = toBytes(DumpTestSample64Val);
+
+INSTANTIATE_TEST_CASE_P(
+    DumpValueParams, DumpValueFixture,
+    testing::Values(DumpValueParams{DW_FORM_strp, DumpTestSample32, DWARF32,
+                                    " .debug_str[0x00112233] = "},
+                    DumpValueParams{DW_FORM_strp, DumpTestSample64, DWARF64,
+                                    " .debug_str[0x11223344556677] = "},
+                    DumpValueParams{DW_FORM_line_strp, DumpTestSample32,
+                                    DWARF32, " .debug_line_str[0x00112233] = "},
+                    DumpValueParams{DW_FORM_line_strp, DumpTestSample64,
+                                    DWARF64,
+                                    " .debug_line_str[0x11223344556677] = "},
+                    DumpValueParams{DW_FORM_sec_offset, DumpTestSample32,
+                                    DWARF32, "0x00112233"},
+                    DumpValueParams{DW_FORM_sec_offset, DumpTestSample64,
+                                    DWARF64, "0x11223344556677"}), );
+
 } // end anonymous namespace