[Sol->Yul] Implementing Byte array push() and pop()

test/libsolidity/semanticTests/array/byte_array_storage_layout.sol

@@ -0,0 +1,45 @@
+contract c {
+    bytes data;
+    function test_short() public returns (uint256 r) {
+        assembly {
+            sstore(data_slot, 0)
+        }
+        for (uint8 i = 0; i < 15; i++) {
+            data.push(bytes1(i));
+        }
+        assembly {
+            r := sload(data_slot)
+        }
+    }
+
+    function test_long() public returns (uint256 r) {
+        assembly {
+            sstore(data_slot, 0)
+        }
+        for (uint8 i = 0; i < 33; i++) {
+            data.push(bytes1(i));
+        }
+        assembly {
+            r := sload(data_slot)
+        }
+    }
+
+    function test_pop() public returns (uint256 r) {
+        assembly {
+            sstore(data_slot, 0)
+        }
+        for (uint8 i = 0; i < 32; i++) {
+            data.push(bytes1(i));
+        }
+        data.pop();
+        assembly {
+            r := sload(data_slot)
+        }
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// test_short() -> 1780731860627700044960722568376587075150542249149356309979516913770823710
+// test_long() -> 67
+// test_pop() -> 1780731860627700044960722568376592200742329637303199754547598369979440702