1 files changed, 43 insertions, 0 deletions
diff --git a/test/spec/memory_redundancy.wast b/test/spec/memory_redundancy.wast
new file mode 100644
index 000000000..2911537e1
--- /dev/null
+++ b/test/spec/memory_redundancy.wast
@@ -0,0 +1,43 @@
+;; Test that optimizers don't do redundant-load, store-to-load, or dead-store
+;; optimizations when there are interfering stores, even of different types
+;; and to non-identical addresses.
+
+(module
+  (memory 1 1)
+
+  (func (export "zero_everything")
+    (i32.store (i32.const 0) (i32.const 0))
+    (i32.store (i32.const 4) (i32.const 0))
+    (i32.store (i32.const 8) (i32.const 0))
+    (i32.store (i32.const 12) (i32.const 0))
+  )
+
+  (func (export "test_store_to_load") (result i32)
+    (i32.store (i32.const 8) (i32.const 0))
+    (f32.store (i32.const 5) (f32.const -0.0))
+    (i32.load (i32.const 8))
+  )
+
+  (func (export "test_redundant_load") (result i32)
+    (local $t i32)
+    (local $s i32)
+    (set_local $t (i32.load (i32.const 8)))
+    (i32.store (i32.const 5) (i32.const 0x80000000))
+    (set_local $s (i32.load (i32.const 8)))
+    (i32.add (get_local $t) (get_local $s))
+  )
+
+  (func (export "test_dead_store") (result f32)
+    (local $t f32)
+    (i32.store (i32.const 8) (i32.const 0x23232323))
+    (set_local $t (f32.load (i32.const 11)))
+    (i32.store (i32.const 8) (i32.const 0))
+    (get_local $t)
+  )
+)
+
+(assert_return (invoke "test_store_to_load") (i32.const 0x00000080))
+(invoke "zero_everything")
+(assert_return (invoke "test_redundant_load") (i32.const 0x00000080))
+(invoke "zero_everything")
+(assert_return (invoke "test_dead_store") (f32.const 0x1.18p-144))