Add warnings for oversized subtypes

test/libsolidity/syntaxTests/largeTypes/large_storage_array_mapping.sol

@@ -2,3 +2,4 @@ contract C {
     mapping(uint => uint[2**100]) x;
 }
 // ----
+// Warning 7325: (17-48): Type uint256[1267650600228229401496703205376] has large size and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.

test/libsolidity/syntaxTests/largeTypes/large_storage_structs.sol

@@ -1,18 +1,65 @@
 contract C {
-    struct P0 { uint256[2**63] x; }
+    struct P { uint256[2**63] x; }
+
     struct S0 {
-        P0[2**62] y;
-        P0 x;
+        P[2**62] x;
+        P y;
     }
     S0 s0;
 
-    struct P1 { uint256[2**63] x; }
     struct S1 {
-        P1 x;
-        P1[2**62] y;
+        P x;
+        P[2**62] y;
     }
     S1 s1;
+
+    struct S2 {
+        mapping(uint => P[2**62]) x;
+        mapping(uint => P[2**62]) y;
+        mapping(uint => S2) z;
+    }
+    S2 s2;
+
+    struct Q0
+    {
+        uint[1][][2**65] x;
+        uint[2**65][][1] y;
+        uint[][2**65] z;
+        uint[2**65][] t;
+    }
+    Q0 q0;
+
+    struct Q1
+    {
+        uint[1][][2**65] x;
+    }
+    Q1 q1;
+
+    struct Q2
+    {
+        uint[2**65][][1] y;
+    }
+    Q2 q2;
+
+    struct Q3
+    {
+        uint[][2**65] z;
+    }
+    Q3 q3;
+
+    struct Q4
+    {
+        uint[2**65][] t;
+    }
+    Q4 q4;
 }
 // ----
-// Warning 3408: (110-115): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
-// Warning 3408: (215-220): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 3408: (108-113): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 3408: (175-180): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 7325: (314-319): Type C.P[4611686018427387904] has large size and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 3408: (458-463): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 7325: (458-463): Type uint256[36893488147419103232] has large size and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 3408: (524-529): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 7325: (590-595): Type uint256[36893488147419103232] has large size and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 3408: (653-658): Variable covers a large part of storage and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.
+// Warning 7325: (716-721): Type uint256[36893488147419103232] has large size and thus makes collisions likely. Either use mappings or dynamic arrays and allow their size to be increased only in small quantities per transaction.