Add more comprehensive tests for embedded inline assembly LValue/RValue access

test/libsolidity/syntaxTests/inlineAssembly/assignment_from_contract.sol

@@ -0,0 +1,9 @@
+contract C {
+  function f() public pure {
+    assembly {
+      let x := C
+    }
+  }
+}
+// ----
+// TypeError: (72-73): Expected a library.

test/libsolidity/syntaxTests/inlineAssembly/assignment_from_functiontype.sol

@@ -0,0 +1,7 @@
+contract C {
+  function f() public pure {
+    assembly {
+      let x := f
+    }
+  }
+}

test/libsolidity/syntaxTests/inlineAssembly/assignment_from_library.sol

@@ -0,0 +1,10 @@
+library L {
+}
+
+contract C {
+  function f() public pure {
+    assembly {
+      let x := L
+    }
+  }
+}

test/libsolidity/syntaxTests/inlineAssembly/assignment_from_super.sol

@@ -0,0 +1,9 @@
+contract C {
+  function f() public pure {
+    assembly {
+      let x := super
+    }
+  }
+}
+// ----
+// DeclarationError: (72-77): Identifier not found.

test/libsolidity/syntaxTests/inlineAssembly/assignment_to_special.sol

@@ -0,0 +1,13 @@
+contract C {
+  function f() public {
+    assembly {
+      super := 1
+      f := 1
+      C := 1
+    }
+  }
+}
+// ----
+// TypeError: (58-63): Only local variables can be assigned to in inline assembly.
+// TypeError: (75-76): Only local variables can be assigned to in inline assembly.
+// TypeError: (88-89): Only local variables can be assigned to in inline assembly.

test/libsolidity/syntaxTests/inlineAssembly/storage_reference_assignment.sol

@@ -0,0 +1,13 @@
+contract C {
+    uint[] x;
+    function() external { 
+        uint[] storage y = x;
+        assembly {
+            y_slot := 1
+            y_offset := 2
+        }
+    }
+}
+// ----
+// TypeError: (115-121): Storage variables cannot be assigned to.
+// TypeError: (139-147): Storage variables cannot be assigned to.

test/libsolidity/syntaxTests/inlineAssembly/storage_reference_on_memory.sol

@@ -0,0 +1,13 @@
+contract C {
+    uint[] x;
+    function() external { 
+        uint[] memory y = x;
+        assembly {
+            pop(y_slot)
+            pop(y_offset)
+        }
+    }
+}
+// ----
+// TypeError: (118-124): The suffixes _offset and _slot can only be used on storage variables.
+// TypeError: (142-150): The suffixes _offset and _slot can only be used on storage variables.