trial test cases extracted from SoliidityEndToEndTest.cpp into .sol files.

removed libevmone.so files from the directory

trial test cases extracted from SoliidityEndToEndTest.cpp into .sol files. Corresponding code in the .cpp file has been commented instead of begin removed pending preliminary reviews

removed libevmone files

Added testcase packed_storage_structs_delete

added test case invalid_enum_logged

added test case enum_referencing

added test case memory_types_initialisation

added test case return string

added test case constant_string_literal.sol

removed extractable keyword from solidityEndtoEnd.cpp, moved copying_bytes_multiassigned.sol to array/copying folder, added recv() function to copying_bytes_multiassigned.sol but this test case is failing now

change typo error in the name of test case library_staticcall_delegatecal.sol to library_staticcall_delegatecall.sol

Added compileToEwasm:false to call_forward_bytes.sol test case and moved it to semanticTests/fallback

added compileToEwasm:false line to library_call_in_homestead

added compileToEwasm: false line to copying_bytes_multiassign, copy_from_calldata_removes_bytes, enum_referencing, library_call_in_homestead, struct_referencing

Added test case internal_types_in_library

Added test case mapping_arguments_in_library

Added test case mapping_returns_in_library

Added test case mapping_returns_in_library_named

Added test case using_library_mappings_public

Added test case library_function_external

Added test case library_stray_values

added test case using_library_mappings_return

added test case using_library_structs

Added test case using_for_function_on_struct and corrections to using_library_structs, using_library_mpapings_return, library_stray_values

Added test case using_for_overload

added test case using_for_by_name

added test case bound_function_in_function

added test case bound_function_in_var

added test case bound_function_to_string

added test case payable_function_calls_library

added function call corrections to copying_bytes_multiassign and call_forward_bytes

Made changes to the test cases as per comments on PR #12289

mentioned in Changelog.md : Extraced some test cases from SolEndToEnd.cpp

Author: nishant-sachdeva

test/libsolidity/SolidityEndToEndTest.cpp

@@ -0,0 +1,33 @@
+contract receiver {
+    uint public received;
+    function recv(uint x) public { received += x + 1; }
+    fallback() external { received = 0x80; }
+}
+contract sender {
+    constructor() { rec = new receiver(); }
+    fallback() external { savedData1 = savedData2 = msg.data; }
+    function forward(bool selector) public returns (bool) {
+        if (selector) { address(rec).call(savedData1); delete savedData1; }
+        else { address(rec).call(savedData2); delete savedData2; }
+        return true;
+    }
+    function val() public returns (uint) { return rec.received(); }
+    receiver rec;
+    bytes savedData1;
+    bytes savedData2;
+}
+// ====
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// (): 7 ->
+// gas irOptimized: 110941
+// gas legacy: 111082
+// gas legacyOptimized: 111027
+// val() -> 0
+// forward(bool): true -> true
+// val() -> 0x80
+// forward(bool): false -> true
+// val() -> 0x80
+// forward(bool): true -> true
+// val() -> 0x80

test/libsolidity/semanticTests/array/copying/copying_bytes_multiassign.sol

@@ -0,0 +1,19 @@
+contract c {
+    function set() public returns (bool) { data = msg.data; return true; }
+    function checkIfDataIsEmpty() public returns (bool) { return data.length == 0; }
+    function sendMessage() public returns (bool, bytes memory) { bytes memory emptyData; return address(this).call(emptyData);}
+    fallback() external { data = msg.data; }
+    bytes data;
+}
+// ====
+// EVMVersion: >=byzantium
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// (): 1, 2, 3, 4, 5 ->
+// gas irOptimized: 155178
+// gas legacy: 155254
+// gas legacyOptimized: 155217
+// checkIfDataIsEmpty() -> false
+// sendMessage() -> true, 0x40, 0
+// checkIfDataIsEmpty() -> true

test/libsolidity/semanticTests/calldata/copy_from_calldata_removes_bytes_data.sol

@@ -0,0 +1,41 @@
+interface I {
+    enum Direction { A, B, Left, Right }
+}
+library L {
+    enum Direction { Left, Right }
+    function f() public pure returns (Direction) {
+        return Direction.Right;
+    }
+    function g() public pure returns (I.Direction) {
+        return I.Direction.Right;
+    }
+}
+contract C is I {
+    function f() public pure returns (Direction) {
+        return Direction.Right;
+    }
+    function g() public pure returns (I.Direction) {
+        return I.Direction.Right;
+    }
+    function h() public pure returns (L.Direction) {
+        return L.Direction.Right;
+    }
+    function x() public pure returns (L.Direction) {
+        return L.f();
+    }
+    function y() public pure returns (I.Direction) {
+        return L.g();
+    }
+}
+// ====
+// compileViaYul: also
+// compileToEwasm: false
+// ----
+// library: L
+// f() -> 3
+// g() -> 3
+// f() -> 3
+// g() -> 3
+// h() -> 1
+// x() -> 1
+// y() -> 3

test/libsolidity/semanticTests/enums/enum_referencing.sol

@@ -0,0 +1,27 @@
+contract receiver {
+    uint256 public received;
+    function recv(uint256 x) public { received += x + 1; }
+    fallback() external { received = 0x80; }
+}
+contract sender {
+    constructor() { rec = new receiver();}
+    fallback() external { savedData = msg.data; }
+    function forward() public returns (bool) { address(rec).call(savedData); return true; }
+    function clear() public returns (bool) { delete savedData; return true; }
+    function val() public returns (uint) { return rec.received(); }
+    receiver rec;
+    bytes savedData;
+}
+// ====
+// allowNonExistingFunctions: true
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// recv(uint256): 7 ->
+// val() -> 0
+// forward() -> true
+// val() -> 8
+// clear() -> true
+// val() -> 8
+// forward() -> true
+// val() -> 0x80

test/libsolidity/semanticTests/fallback/call_forward_bytes.sol

@@ -0,0 +1,16 @@
+library L {
+    function g(function() internal returns (uint) _t) internal returns (uint) { return _t(); }
+}
+contract C {
+    using L for *;
+    function f() public returns (uint) {
+        return t.g();
+    }
+    function t() public pure returns (uint)  { return 7; }
+}
+// ====
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// library: L
+// f() -> 7

test/libsolidity/semanticTests/functionCall/bound_function_in_function.sol

@@ -0,0 +1,16 @@
+library D { struct s { uint a; } function mul(s storage self, uint x) public returns (uint) { return self.a *= x; } }
+contract C {
+    using D for D.s;
+    D.s public x;
+    function f(uint a) public returns (uint) {
+        x.a = 6;
+        return (x.mul)({x: a});
+    }
+}
+// ====
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// library: D
+// f(uint256): 7 -> 0x2a
+// x() -> 0x2a

test/libsolidity/semanticTests/functionCall/bound_function_in_var.sol

@@ -0,0 +1,20 @@
+library D { function length(string memory self) public returns (uint) { return bytes(self).length; } }
+contract C {
+    using D for string;
+    string x;
+    function f() public returns (uint) {
+        x = "abc";
+        return x.length();
+    }
+    function g() public returns (uint) {
+        string memory s = "abc";
+        return s.length();
+    }
+}
+// ====
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// library: D
+// f() -> 3
+// g() -> 3

test/libsolidity/semanticTests/functionCall/bound_function_to_string.sol

@@ -0,0 +1,30 @@
+library Lib {
+    function find(uint16[] storage _haystack, uint16 _needle) public view returns (uint)
+    {
+        for (uint i = 0; i < _haystack.length; ++i)
+            if (_haystack[i] == _needle)
+                return i;
+        return type(uint).max;
+    }
+}
+contract Test {
+    mapping(string => uint16[]) data;
+    function f() public returns (uint a, uint b)
+    {
+        while (data["abc"].length < 20)
+            data["abc"].push();
+        data["abc"][4] = 9;
+        data["abc"][17] = 3;
+        a = Lib.find(data["abc"], 9);
+        b = Lib.find(data["abc"], 3);
+    }
+}
+// ====
+// compileToEwasm: false
+// compileViaYul: also
+// ----
+// library: Lib
+// f() -> 4, 0x11
+// gas irOptimized: 115822
+// gas legacy: 135952
+// gas legacyOptimized: 119643

test/libsolidity/semanticTests/libraries/internal_types_in_library.sol

@@ -0,0 +1,15 @@
+library Lib { function m() public returns (address) { return msg.sender; } }
+contract Test {
+    address public sender;
+    function f() public {
+        sender = Lib.m();
+    }
+}
+// ====
+// compileViaYul: also
+// compileToEwasm: false
+// EVMVersion: >=homestead
+// ----
+// library: Lib
+// f() ->
+// sender() -> 0x1212121212121212121212121212120000000012