Fix alignment in MixedAllocator (#1740)

Necessary for simd, as we add a type with alignment >8. We were just broken on that before this PR.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/emscripten-optimizer/simple_ast.h b/src/emscripten-optimizer/simple_ast.h
index 237d9c1b5..9cbe7616c 100644
--- a/src/emscripten-optimizer/simple_ast.h
+++ b/src/emscripten-optimizer/simple_ast.h
@@ -80,7 +80,7 @@ class GlobalMixedArena : public MixedArena {
 public:
   template<class T>
   T* alloc() {
-    auto* ret = static_cast<T*>(allocSpace(sizeof(T)));
+    auto* ret = static_cast<T*>(allocSpace(sizeof(T), alignof(T)));
     new (ret) T();
     return ret;
   }
@@ -92,7 +92,7 @@ class ArrayStorage : public ArenaVectorBase<ArrayStorage, Ref> {
 public:
   void allocate(size_t size) {
     allocatedElements = size;
-    data = static_cast<Ref*>(arena.allocSpace(sizeof(Ref) * allocatedElements));
+    data = static_cast<Ref*>(arena.allocSpace(sizeof(Ref) * allocatedElements, alignof(Ref)));
   }
 };