4 files changed, 32 insertions, 1 deletions
diff --git a/backendC/CleanCompilerSources/checker.h b/backendC/CleanCompilerSources/checker.h
index 1a0121d..c399a30 100644
--- a/backendC/CleanCompilerSources/checker.h
+++ b/backendC/CleanCompilerSources/checker.h
@@ -13,6 +13,9 @@ extern Ident StrictListId,UnboxedListId,TailStrictListId,StrictTailStrictListId,
 #ifdef CLEAN2
 extern Ident DynamicId;
 #endif
+#if SA_RECOGNIZES_ABORT_AND_UNDEF
+extern Ident StdMiscId,abort_id,undef_id;
+#endif
 
 extern Symbol StartSymbol, UnboxedArrayClassSymbols [], UnboxedArrayFunctionSymbols [];
 extern SymbDef scc_dependency_list,ArrayFunctionDefs[], StdArrayAbortDef;
diff --git a/backendC/CleanCompilerSources/checker_2.c b/backendC/CleanCompilerSources/checker_2.c
index 3a7694b..a155447 100644
--- a/backendC/CleanCompilerSources/checker_2.c
+++ b/backendC/CleanCompilerSources/checker_2.c
@@ -110,6 +110,10 @@ Ident AnnotatedId, ListId, TupleId, ConsId, NilId, ApplyId, SelectId,
 	DeltaBId, IfId, FailId, AndId, OrId,
 	StdArrayId, ArrayFunctionIds [NoArrayFun];
 
+#if SA_RECOGNIZES_ABORT_AND_UNDEF
+Ident StdMiscId,abort_id,undef_id;	
+#endif
+
 Symbol StartSymbol;
 
 SymbDef ArrayFunctionDefs [NoArrayFun],StdArrayAbortDef;
@@ -193,10 +197,19 @@ void InitChecker (void)
 	AndId		= PutStringInHashTable ("&&", SymbolIdTable);
 	OrId		= PutStringInHashTable ("||", SymbolIdTable);
 
+#if SA_RECOGNIZES_ABORT_AND_UNDEF
+	abort_id = PutStringInHashTable ("abort",SymbolIdTable);
+	undef_id = PutStringInHashTable ("undef",SymbolIdTable);
+#endif
+
 	SystemFunctionsId	= PutStringInHashTable ("StdEnum", ModuleIdTable);
 	DeltaBId 			= PutStringInHashTable ("StdBool", ModuleIdTable);
 	StdArrayId			= PutStringInHashTable ("_SystemArray", ModuleIdTable);
 
+#if SA_RECOGNIZES_ABORT_AND_UNDEF
+	StdMiscId = PutStringInHashTable ("StdMisc",ModuleIdTable);
+#endif
+
  	/* Predefined Array functions */
  	
  	StdArrayAbortId						= PutStringInHashTable ("_abortArray", SymbolIdTable);
diff --git a/backendC/CleanCompilerSources/compiledefines.h b/backendC/CleanCompilerSources/compiledefines.h
index a49163b..3e89a85 100644
--- a/backendC/CleanCompilerSources/compiledefines.h
+++ b/backendC/CleanCompilerSources/compiledefines.h
@@ -18,6 +18,8 @@
 
 #define WRITE_DCL_MODIFICATION_TIME 1
 
+#define SA_RECOGNIZES_ABORT_AND_UNDEF 0
+
 #define STRICT_LISTS 1
 
 #undef KARBON
 \ No newline at end of file
diff --git a/backendC/CleanCompilerSources/sa.c b/backendC/CleanCompilerSources/sa.c
index 179b75b..1bbc0c4 100644
--- a/backendC/CleanCompilerSources/sa.c
+++ b/backendC/CleanCompilerSources/sa.c
@@ -2240,7 +2240,20 @@ static Exp ConvertNode (Node node, NodeId nid)
 						TypeArgs typeargs;
 						unsigned int i;
 						Exp exp;
-						
+
+#if SA_RECOGNIZES_ABORT_AND_UNDEF
+						if (sdef->sdef_module==StdMiscId->ident_name){
+							if ((sdef->sdef_ident==abort_id && node->node_arity==1) || sdef->sdef_ident==undef_id){
+								e->e_kind = Bottom;
+								e->e_sym = 0;
+								e->e_hnf = True;
+								e->e_spechnf= True;
+
+								return e;
+							}
+						}
+#endif
+
 						rule = sdef->sdef_rule_type->rule_type_rule;
 						typeargs = rule->type_alt_lhs->type_node_arguments;