-O validate-ZAM option

src/script_opt/ScriptOpt.h

@@ -61,6 +61,10 @@ struct AnalyOpt {
     // recursive, and exit.  Only germane if running the inliner.
     bool report_recursive = false;
 
+    // If true, assess the instructions generated from ZAM templates
+    // for validity, and exit.
+    bool validate_ZAM = false;
+
     // If true, generate ZAM code for applicable function bodies,
     // activating all optimizations.
     bool gen_ZAM = false;
@@ -241,6 +245,11 @@ extern bool should_analyze(const ScriptFuncPtr& f, const StmtPtr& body);
 // suppressed by the flag) and optimization.
 extern void analyze_scripts(bool no_unused_warnings);
 
+// Conduct internal validation of ZAM instructions. Upon success, generates
+// a terse report to stdout.  Exits with an internal error if a problem is
+// encountered.
+extern void validate_ZAM_insts();
+
 // Called when all script processing is complete and we can discard
 // unused ASTs and associated state.
 extern void clear_script_analysis();