feat: Added indicator for allocated regions

src/band.c

@@ -59,7 +59,7 @@ size_t band_find_empty_region_index(band_t* band) {
 		}
 	}
 
-	band->regions = list_ensure_space(band->regions, sizeof(region_t*), 1);
+	list_add(band->regions, NULL);
 	return regions_size;
 }
 
@@ -119,3 +119,32 @@ void band_region_free(band_t* band, region_t* region) {
 void band_region_free_raw(band_t* band, band_addr_t addr) {
 	band_region_free(band, band->band[addr]);
 }
+
+size_t band_number_of_regions(band_t* band) {
+    size_t regions_size = list_size(band->regions);
+
+    size_t result = 0;
+    for (size_t i = 0; i < regions_size; i++) {
+        if (band->regions[i] != NULL) {
+            result++;
+        }
+    }
+    return result;
+}
+
+region_t** band_iterate(band_t* band, region_t** last_ptr) {
+    size_t size = list_size(band->regions);
+
+    size_t offset = 0;
+    if (last_ptr) {
+        offset = (((uintptr_t) last_ptr) - ((uintptr_t) band->regions)) / sizeof(void *) + 1;
+    }
+
+    for (size_t i = offset; i < size; i++) {
+        if (band->regions[i] != NULL) {
+            return band->regions + i;
+        }
+    }
+
+    return NULL;
+}

src/band.h

@@ -36,5 +36,7 @@ void band_make_var(band_t*, region_t*, const char*);
 void band_region_free(band_t*, region_t*);
 void band_region_free_raw(band_t*, band_addr_t);
 
+size_t band_number_of_regions(band_t*);
+region_t** band_iterate(band_t*, region_t**);
 
 #endif

src/codegen.c

@@ -183,6 +183,26 @@ void codegen_statement(FILE* out, band_t* band, struct statement* statement) {
 	fprintf(out, "\n");
 }
 
+void check_allocations(band_t* band) {
+    size_t number_of_allocated_regions = band_number_of_regions(band);
+
+    if (number_of_allocated_regions > 0) {
+        fprintf(stderr, WARN("code generation existed with allocated regions:\n"));
+
+        region_t** region_ptr = NULL;
+        while((region_ptr = band_iterate(band, region_ptr)) != NULL) {
+            region_t* region = *region_ptr;
+
+            fprintf(stderr, "- (%zu) ", region->size);
+            if (region->is_temp) {
+                fprintf(stderr, "[anonymous] (this is a bug in the compiler!)\n");
+            } else {
+                fprintf(stderr, "variable %s\n", region->variable);
+            }
+        }
+    }
+}
+
 int codegen(FILE* out, struct program* program) {
 	band_t* band = band_init();
 	
@@ -190,5 +210,7 @@ int codegen(FILE* out, struct program* program) {
 		codegen_statement(out, band, program->statements[i]);
 	}
 
+    check_allocations(band);
+
 	return 0;
 }