This adds alpha.core.StoreToImmutable, a new alpha checker that detects
writes
to immutable memory regions, implementing part of SEI CERT Rule ENV30-C.
The
original proposal only handled global const variables, but this
implementation
extends it to also detect writes to:
- Local const variables
- String literals
- Const parameters and struct members
- Const arrays and pointers to const data
This checker is the continuation of the work started by zukatsinadze.
Discussion: https://reviews.llvm.org/D124244
