diff --git a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
--- a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
+++ b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
@@ -3158,6 +3158,12 @@
     return;
   }
 
+  if (const auto *TPO = dyn_cast<TemplateParamObjectDecl>(D)) {
+    // FIXME: We should meaningfully implement this.
+    (void)TPO;
+    return;
+  }
+
   llvm_unreachable("Support for this Decl not implemented.");
 }
 
diff --git a/clang/test/Analysis/template-param-objects.cpp b/clang/test/Analysis/template-param-objects.cpp
new file mode 100644
--- /dev/null
+++ b/clang/test/Analysis/template-param-objects.cpp
@@ -0,0 +1,33 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection \
+// RUN:    -analyzer-config eagerly-assume=false -std=c++20 -verify %s
+
+template <class T> void clang_analyzer_dump(T);
+void clang_analyzer_eval(bool);
+
+struct Box {
+  int value;
+};
+bool operator ==(Box lhs, Box rhs) {
+  return lhs.value == rhs.value;
+}
+template <Box V> void dumps() {
+  clang_analyzer_dump(V);        // expected-warning {{lazyCompoundVal}}
+  clang_analyzer_dump(&V);       // expected-warning {{Unknown}}
+  clang_analyzer_dump(V.value);  // expected-warning {{Unknown}} FIXME: It should be '6 S32b'.
+  clang_analyzer_dump(&V.value); // expected-warning {{Unknown}}
+}
+template void dumps<Box{6}>();
+
+// [temp.param].7.3.2:
+// "All such template parameters in the program of the same type with the
+// same value denote the same template parameter object."
+template <Box A1, Box A2, Box B1, Box B2> void stable_addresses() {
+  clang_analyzer_eval(&A1 == &A2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE.
+  clang_analyzer_eval(&B1 == &B2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE.
+  clang_analyzer_eval(&A1 == &B2); // expected-warning {{UNKNOWN}} FIXME: It should be FALSE.
+
+  clang_analyzer_eval(A1 == A2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE.
+  clang_analyzer_eval(B1 == B2); // expected-warning {{UNKNOWN}} FIXME: It should be TRUE.
+  clang_analyzer_eval(A1 == B2); // expected-warning {{UNKNOWN}} FIXME: It should be FALSE.
+}
+template void stable_addresses<Box{1}, Box{1}, Box{2}, Box{2}>();