Add -I command line option to force the interpreter to execute the code higher...

Add -I command line option to force the interpreter to execute the code higher level tiers get disabled

src/codegen/ast_interpreter.cpp

@@ -381,7 +381,7 @@ Value ASTInterpreter::visit_jump(AST_Jump* node) {
 
     if (ENABLE_OSR && backedge) {
         ++edgecount;
-        if (edgecount > OSR_THRESHOLD) {
+        if (edgecount > OSR_THRESHOLD && !FORCE_INTERPRETER) {
             eraseDeadSymbols();
 
             const OSREntryDescriptor* found_entry = nullptr;
@@ -1081,7 +1081,7 @@ const void* interpreter_instr_addr = (void*)&ASTInterpreter::execute;
 
 Box* astInterpretFunction(CompiledFunction* cf, int nargs, Box* closure, Box* generator, Box* arg1, Box* arg2,
                           Box* arg3, Box** args) {
-    if (unlikely(cf->times_called > REOPT_THRESHOLD && ENABLE_REOPT)) {
+    if (unlikely(cf->times_called > REOPT_THRESHOLD && ENABLE_REOPT && !FORCE_INTERPRETER)) {
         CompiledFunction* optimized = reoptCompiledFuncInternal(cf);
         if (closure && generator)
             return optimized->closure_generator_call((BoxedClosure*)closure, (BoxedGenerator*)generator, arg1, arg2,

src/codegen/irgen/hooks.cpp

@@ -94,6 +94,8 @@ ScopeInfo* SourceInfo::getScopeInfo() {
 }
 
 EffortLevel::EffortLevel initialEffort() {
+    if (FORCE_INTERPRETER)
+        return EffortLevel::INTERPRETED;
     if (FORCE_OPTIMIZE)
         return EffortLevel::MAXIMAL;
     if (ENABLE_INTERPRETER)

src/core/options.cpp

@@ -29,6 +29,7 @@ int PYTHON_VERSION_HEX = version_hex(PYTHON_VERSION_MAJOR, PYTHON_VERSION_MINOR,
 
 int MAX_OPT_ITERATIONS = 1;
 
+bool FORCE_INTERPRETER = false;
 bool FORCE_OPTIMIZE = false;
 bool SHOW_DISASM = false;
 bool PROFILE = false;

src/core/options.h

@@ -31,8 +31,8 @@ inline int version_hex(int major, int minor, int micro, int level = 0, int seria
 
 extern int MAX_OPT_ITERATIONS;
 
-extern bool SHOW_DISASM, FORCE_OPTIMIZE, PROFILE, DUMPJIT, TRAP, USE_STRIPPED_STDLIB, ENABLE_INTERPRETER,
-    ENABLE_PYPA_PARSER, USE_REGALLOC_BASIC;
+extern bool SHOW_DISASM, FORCE_INTERPRETER, FORCE_OPTIMIZE, PROFILE, DUMPJIT, TRAP, USE_STRIPPED_STDLIB,
+    ENABLE_INTERPRETER, ENABLE_PYPA_PARSER, USE_REGALLOC_BASIC;
 
 extern bool ENABLE_ICS, ENABLE_ICGENERICS, ENABLE_ICGETITEMS, ENABLE_ICSETITEMS, ENABLE_ICDELITEMS, ENABLE_ICBINEXPS,
     ENABLE_ICNONZEROS, ENABLE_ICCALLSITES, ENABLE_ICSETATTRS, ENABLE_ICGETATTRS, ENALBE_ICDELATTRS, ENABLE_ICGETGLOBALS,

src/jit.cpp

@@ -58,7 +58,7 @@ int main(int argc, char** argv) {
     bool force_repl = false;
     bool repl = true;
     bool stats = false;
-    while ((code = getopt(argc, argv, "+Oqcdibpjtrsvnx")) != -1) {
+    while ((code = getopt(argc, argv, "+OqcdIibpjtrsvnx")) != -1) {
         if (code == 'O')
             FORCE_OPTIMIZE = true;
         else if (code == 't')
@@ -71,6 +71,8 @@ int main(int argc, char** argv) {
         // caching = true;
         else if (code == 'd')
             SHOW_DISASM = true;
+        else if (code == 'I')
+            FORCE_INTERPRETER = true;
         else if (code == 'i')
             force_repl = true;
         else if (code == 'n') {