Moving some byte array pop tests to semanticTests.

test/libsolidity/semanticTests/array/pop/byte_array_pop_long_storage_empty.sol

@@ -0,0 +1,21 @@
+contract c {
+    uint256 a;
+    uint256 b;
+    uint256 c;
+    bytes data;
+    function test() public returns (bool) {
+        for (uint8 i = 0; i <= 40; i++)
+            data.push(byte(i+1));
+        for (int8 j = 40; j >= 0; j--) {
+            require(data[uint8(j)] == byte(j+1));
+            require(data.length == uint8(j+1));
+            data.pop();
+        }
+        return true;
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// test() -> true
+// storage: empty

test/libsolidity/semanticTests/array/pop/byte_array_pop_long_storage_empty_garbage_ref.sol

@@ -0,0 +1,20 @@
+contract c {
+    uint256 a;
+    uint256 b;
+    bytes data;
+    function test() public {
+        for (uint8 i = 0; i <= 40; i++)
+            data.push(0x03);
+        for (uint8 j = 0; j <= 40; j++) {
+            assembly {
+                mstore(0, "garbage")
+            }
+            data.pop();
+        }
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// test() ->
+// storage: empty

test/libsolidity/semanticTests/array/pop/byte_array_pop_storage_empty.sol

@@ -0,0 +1,16 @@
+contract c {
+    bytes data;
+    function test() public {
+        data.push(0x07);
+        data.push(0x05);
+        data.push(0x03);
+        data.pop();
+        data.pop();
+        data.pop();
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// test() ->
+// storage: empty