Implement table.get (#4195)

Adds the part of the spec test suite that this passes (without table.set we
can't do it all).

1 files changed, 79 insertions, 0 deletions

diff --git a/test/spec/table_get.wast b/test/spec/table_get.wast
new file mode 100644
index 000000000..de5f6622a
--- /dev/null
+++ b/test/spec/table_get.wast
@@ -0,0 +1,79 @@
+(module
+  (table $t2 2 externref)
+  (table $t3 3 funcref)
+  (elem (table $t3) (i32.const 1) func $dummy)
+  (func $dummy)
+
+  (func (export "get-externref") (param $i i32) (result externref)
+    (table.get $t2 (local.get $i))
+  )
+  (func $f3 (export "get-funcref") (param $i i32) (result funcref)
+    (table.get $t3 (local.get $i))
+  )
+
+  (func (export "is_null-funcref") (param $i i32) (result i32)
+    (ref.is_null (call $f3 (local.get $i)))
+  )
+)
+
+(assert_return (invoke "get-externref" (i32.const 0)) (ref.null extern))
+
+(assert_return (invoke "get-funcref" (i32.const 0)) (ref.null func))
+(assert_return (invoke "is_null-funcref" (i32.const 1)) (i32.const 0))
+
+(assert_trap (invoke "get-externref" (i32.const 2)) "out of bounds")
+(assert_trap (invoke "get-funcref" (i32.const 3)) "out of bounds")
+(assert_trap (invoke "get-externref" (i32.const -1)) "out of bounds")
+(assert_trap (invoke "get-funcref" (i32.const -1)) "out of bounds")
+
+
+;; Type errors
+
+(assert_invalid
+  (module
+    (table $t 10 externref)
+    (func $type-index-empty-vs-i32 (result externref)
+      (table.get $t)
+    )
+  )
+  "type mismatch"
+)
+(assert_invalid
+  (module
+    (table $t 10 externref)
+    (func $type-index-f32-vs-i32 (result externref)
+      (table.get $t (f32.const 1))
+    )
+  )
+  "type mismatch"
+)
+
+(assert_invalid
+  (module
+    (table $t 10 externref)
+    (func $type-result-externref-vs-empty
+      (table.get $t (i32.const 0))
+    )
+  )
+  "type mismatch"
+)
+(assert_invalid
+  (module
+    (table $t 10 externref)
+    (func $type-result-externref-vs-funcref (result funcref)
+      (table.get $t (i32.const 1))
+    )
+  )
+  "type mismatch"
+)
+
+(assert_invalid
+  (module
+    (table $t1 1 funcref)
+    (table $t2 1 externref)
+    (func $type-result-externref-vs-funcref-multi (result funcref)
+      (table.get $t2 (i32.const 0))
+    )
+  )
+  "type mismatch"
+)