From 33d0f6aa084072dffd06146374e6e96317a231c3 Mon Sep 17 00:00:00 2001
From: Ben Clayton <bclayton@google.com>
Date: Fri, 7 May 2021 14:15:14 +0000
Subject: [PATCH] Fix UBSAN error

As() was being called on a nullptr object.

Change-Id: Iedd7f1c57d12f1ad5ea2af60317817841f5d1392
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/50303
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
---
 src/reader/spirv/function.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/reader/spirv/function.cc b/src/reader/spirv/function.cc
index 523c370ddf..1cbbc34e2b 100644
--- a/src/reader/spirv/function.cc
+++ b/src/reader/spirv/function.cc
@@ -4033,7 +4033,7 @@ ast::StorageClass FunctionEmitter::GetStorageClassForPointerValue(uint32_t id) {
   const auto type_id = def_use_mgr_->GetDef(id)->type_id();
   if (type_id) {
     auto* ast_type = parser_impl_.ConvertType(type_id);
-    if (auto* ptr = ast_type->As<ast::Pointer>()) {
+    if (auto* ptr = As<ast::Pointer>(ast_type)) {
       return ptr->storage_class();
     }
   }