================
@@ -30,3 +30,10 @@ void f3(void *dest) {
void *src = __builtin_alloca(5);
memcpy(dest, src, 1); // expected-warning{{2nd function call argument is a
pointer to uninitialized value}}
}
+
+// Reproduce crash from GH#94496. When array is used as subcript to another
array, CSA cannot model it
+// and should just assume it's unknown and do not crash.
+void f4(char *array) {
+ char b[4] = {0};
+ array[__builtin_bit_cast(int, b)] = 0x10; // no crash
----------------
steakhal wrote:
Please enable the `debug.ExprInspection` checker too, and then forward declare
(but not define) the `void clang_analyzer_dump_int(int);
```suggestion
clang_analyzer_dump_int(__builtin_bit_cast(int, b)); // expected-warning
{{Unknown}}
array[__builtin_bit_cast(int, b)] = 0x10; // no crash
```
Hold on. Shouldn't we pin the target triple to be able to safely assume that a
sizeof `int` is 4 chars? Consider pinning the target using `-triple xxx` in the
RUN line.
https://github.com/llvm/llvm-project/pull/101647
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