spirv-fuzz: Quit fuzzer pass when no types are available (#4409)
The fuzzer pass that adds global variables requires some basic
types. This change makes the fuzzer pass exit gracefully when none are
available.
Fixes #4408.
diff --git a/source/fuzz/fuzzer_pass_add_global_variables.cpp b/source/fuzz/fuzzer_pass_add_global_variables.cpp
index 0679741..be78ee5 100644
--- a/source/fuzz/fuzzer_pass_add_global_variables.cpp
+++ b/source/fuzz/fuzzer_pass_add_global_variables.cpp
@@ -47,6 +47,10 @@
// These are the basic types that are available to this fuzzer pass.
auto& basic_types = basic_type_ids_and_pointers.first;
+ if (basic_types.empty()) {
+ // There are no basic types, so there is nothing this fuzzer pass can do.
+ return;
+ }
// These are the pointers to those basic types that are *initially* available
// to the fuzzer pass. The fuzzer pass might add pointer types in cases where
