1 files changed, 10 insertions, 0 deletions
diff --git a/lib/CodeGen/FunctionGen.cc b/lib/CodeGen/FunctionGen.cc
index 77a37ec..99c6a1e 100644
--- a/lib/CodeGen/FunctionGen.cc
+++ b/lib/CodeGen/FunctionGen.cc
@@ -38,6 +38,10 @@ void FunctionGen::createArgumentAllocas(Function *F, const std::vector<ParamDecl
             fprintf(stderr, "Error: parameter '%s' collides with an enum value\n", P.Name.c_str());
             HadError = true;
         }
+        if (Types.resolve(P.Name)) {
+            fprintf(stderr, "Error: parameter '%s' collides with a type name\n", P.Name.c_str());
+            HadError = true;
+        }
         Value *ArgVal = &(*AI);
         ++AI;
         ArgVal->setName(P.Name);
@@ -98,6 +102,12 @@ Function *FunctionGen::emitPrototype(PrototypeAST *Proto) {
         HadError = true;
         return nullptr;
     }
+    if (Types.resolve(Proto->getName())) {
+        fprintf(stderr, "Error: '%s' is a type name and cannot be a FUNCTION/PROCEDURE name\n",
+                Proto->getName().c_str());
+        HadError = true;
+        return nullptr;
+    }
 
     FuncSig Sig;
     Sig.ReturnTypeName = Proto->getReturnType();