[all-commits] [llvm/llvm-project] 883ef1: [clang] Don't omit null pointer checks with -fms-c...

[eleviant via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 883ef1ba1442618938961e8f8e3a6a74f3b7320a
      https://github.com/llvm/llvm-project/commit/883ef1ba1442618938961e8f8e3a6a74f3b7320a
  Author: eleviant <eleviant at accesssoftek.com>
  Date:   2026-07-09 (Thu, 09 Jul 2026)

  Changed paths:
    M clang/docs/ReleaseNotes.md
    M clang/include/clang/Options/Options.td
    A clang/test/CodeGen/null-checks.c

  Log Message:
  -----------
  [clang] Don't omit null pointer checks with -fms-compatibility (#204658)

MSVC preserves null check after dereference, e.g

```
struct Obj { int value, extra; };

int null_check_is_kept(Obj* p) {
    int v = p->value;
    if (p == nullptr)
        return -1;
    return v + p->extra;
}
```
Also MSVC keeps standard library calls (e.g memcpy), where target is
null pointer.



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