fix: indirect subscript

src/llvm_codegen/codegen.cpp

@@ -160,7 +160,7 @@ class codegen_visitor final
           );
           builder.CreateMemSet(
               arr, Constant::getIntegerValue(Type::getInt8Ty(get_ctx()), APInt(8, 0)),
-              array_type.size, MaybeAlign()
+              array_type.size * 4, MaybeAlign()
           );
           return arr;
         } else

src/pclc.cc

@@ -140,6 +140,7 @@ int main(int argc, char *argv[]) try {
     });
 
     exec->finalizeObject();
+    exec->setVerifyModules(true);
     exec->runFunction(module_ref.getFunction("main"), {});
 
     auto &Err = exec->getErrorMessage();

test/array/subscript-var.ans

@@ -0,0 +1 @@
+1

test/array/subscript-var.pcl

@@ -0,0 +1,6 @@
+{
+  int[5] arr = 0;
+  arr[1] = 1;
+  b = (arr[1] + arr[1]) / 2;
+  print arr[b];
+}

test/array/subscript.ans

@@ -0,0 +1,3 @@
+0
+2
+0

test/array/subscript.pcl

@@ -0,0 +1,7 @@
+{
+  int[2] arr = 0;
+  print arr[1];
+  arr[1] = 2;
+  print arr[1];
+  print arr[0];
+}