| /* Verify that dereferencing uninitialized VLAs correctly reflects |
| offsets into the objects. |
| The test's main purpose is to exercise the formatting of MEM_REFs. |
| If -Wuninitialized gets smarter and detects uninitialized accesses |
| before they're turned into MEM_REFs the test will likely need to |
| be adjusted. Ditto if -Wuninitialized output changes for some |
| other reason. |
| { dg-do compile { target { { lp64 || ilp32 } || llp64 } } } |
| { dg-options "-O2 -Wall -ftrack-macro-expansion=0" } */ |
| |
| #define CONCAT(x, y) x ## y |
| #define CAT(x, y) CONCAT(x, y) |
| #define UNIQ(name) CAT (name, __LINE__) |
| |
| typedef __SIZE_TYPE__ size_t; |
| |
| extern void* malloc (size_t); |
| |
| void sink (void*, ...); |
| |
| #define T(Type, idx, off) \ |
| __attribute__ ((noipa)) \ |
| void UNIQ (test_)(int n) \ |
| { \ |
| char a[n], *p = a; \ |
| Type *q = (Type*)((char*)p + off); \ |
| sink (p, q[idx]); \ |
| } \ |
| typedef void dummy_type |
| |
| T (int, 0, 0); // { dg-warning "'\\*\\(int \\*\\)a' is used uninitialized" } |
| T (int, 0, 1); // { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)a \\+ 1\\)'" } |
| T (int, 0, 2); // { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)a \\+ 2\\)'" } |
| T (int, 0, 3); // { dg-warning "'\\*\\(int \\*\\)\\(\\(char \\*\\)a \\+ 3\\)'" } |
| T (int, 0, 4); // { dg-warning "'\\(\\(int \\*\\)a\\)\\\[1]'" } |
| T (int, 0, 5); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 1\\)\\)\\\[1]'" } |
| T (int, 0, 6); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 2\\)\\)\\\[1]'" } |
| T (int, 0, 7); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 3\\)\\)\\\[1]'" } |
| T (int, 0, 8); // { dg-warning "'\\(\\(int \\*\\)a\\)\\\[2]'" } |
| T (int, 0, 9); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 1\\)\\)\\\[2]'" } |
| |
| |
| T (int, 1, 0); // { dg-warning "'\\(\\(int \\*\\)a\\)\\\[1]' is used uninitialized" } |
| T (int, 1, 1); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 1\\)\\)\\\[1]'" } |
| T (int, 1, 2); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 2\\)\\)\\\[1]'" } |
| T (int, 1, 3); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 3\\)\\)\\\[1]'" } |
| T (int, 1, 4); // { dg-warning "'\\(\\(int \\*\\)a\\)\\\[2]'" } |
| T (int, 1, 5); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 1\\)\\)\\\[2]'" } |
| T (int, 1, 6); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 2\\)\\)\\\[2]'" } |
| T (int, 1, 7); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 3\\)\\)\\\[2]'" } |
| T (int, 1, 8); // { dg-warning "'\\(\\(int \\*\\)a\\)\\\[3]'" } |
| T (int, 1, 9); // { dg-warning "'\\(\\(int \\*\\)\\(\\(char \\*\\)a \\+ 1\\)\\)\\\[3]'" } |
