Haopeng Liu fed817a8b2 [DSE] Consider the aliasing through global variable while checking clobber (#120044) ...

While update the read clobber check for the "initializes" attr, we
checked the aliasing among arguments, but didn't consider the aliasing
through global variable. It causes problems in this example:

```
int g_var = 123;

void update(int* ptr) {
  *ptr = g_var;

void foo() {
  g_var = 0;
  bar(&g_var);
}
```
We mistakenly removed `g_var = 0;` as a dead store.

Fix the issue by requiring the CallBase only access argmem or
inaccessiblemem.

2025-01-14 10:04:41 -08:00

105 KiB

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