Support copying of nested calldata arrays to memory.

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

@@ -30,7 +30,7 @@ contract c {
     }
 }
 // ====
-// compileViaYul: true
+// compileViaYul: also
 // ----
 // test1(uint256[][]): 0x20, 2, 0x40, 0x40, 2, 23, 42 -> 2, 65
 // test2(uint256[][2]): 0x20, 0x40, 0x40, 2, 23, 42 -> 2, 65

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

@@ -18,6 +18,6 @@ contract C {
     }
 }
 // ====
-// compileViaYul: true
+// compileViaYul: also
 // ----
 // f((uint256[])[]): 0x20, 3, 0x60, 0x60, 0x60, 0x20, 3, 1, 2, 3 -> 3, 1

test/libsolidity/semanticTests/array/copying/calldata_2d_bytes_to_memory.sol

@@ -0,0 +1,14 @@
+pragma abicoder v2;
+
+contract C {
+    function g(bytes[2] memory m) internal returns (bytes memory) {
+        return m[0];
+    }
+    function f(bytes[2] calldata c) external returns (bytes memory) {
+        return g(c);
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// f(bytes[2]): 0x20, 0x40, 0x40, 2, "ab" -> 0x20, 2, "ab"

test/libsolidity/semanticTests/array/copying/calldata_2d_bytes_to_memory_2.sol

@@ -0,0 +1,18 @@
+pragma abicoder v2;
+
+contract C {
+    function g(bytes[2] memory m) internal {
+        assert(m[0].length > 1);
+        assert(m[1].length > 1);
+        assert(m[0][0] == m[1][0]);
+        assert(m[0][1] == m[1][1]);
+    }
+    function f(bytes[2] calldata c) external {
+        g(c);
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// f(bytes[2]): 0x20, 0x40, 0x40, 2, "ab" ->
+// f(bytes[2]): 0x20, 0x40, 0x40, 1, "a" -> FAILURE

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

@@ -0,0 +1,14 @@
+pragma abicoder v2;
+
+contract Test {
+    struct shouldBug {
+        uint256[][2] deadly;
+    }
+    function killer(uint256[][2] calldata weapon) pure external returns (shouldBug memory) {
+        return shouldBug(weapon);
+    }
+}
+// ====
+// compileViaYul: also
+// ----
+// killer(uint256[][2]): 0x20, 0x40, 0x40, 2, 1, 2 -> 0x20, 0x20, 0x40, 0xa0, 2, 1, 2, 2, 1, 2

test/libsolidity/syntaxTests/array/nested_calldata_memory.sol

@@ -10,4 +10,3 @@ contract Test {
 }
 
 // ----
-// UnimplementedFeatureError: Copying nested dynamic calldata arrays to memory is not implemented in the old code generator.

test/libsolidity/syntaxTests/array/nested_calldata_memory2.sol

@@ -10,4 +10,3 @@ contract Test {
 }
 
 // ----
-// UnimplementedFeatureError: Copying nested dynamic calldata arrays to memory is not implemented in the old code generator.

test/libsolidity/syntaxTests/array/nested_calldata_memory3.sol

@@ -10,4 +10,3 @@ contract Test {
 }
 
 // ----
-// UnimplementedFeatureError: Copying nested dynamic calldata arrays to memory is not implemented in the old code generator.