---
id: 4572
title: "A glance at compiler internals: Keep my memset"
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/a-glance-at-compiler-internals-keep-my-memset.html"
published_at: "2014-06-26T22:00:00Z"
tags: ["c", "llvm", "compilers", "security", "clang", "optimization"]
phying_url: "https://phying.com/item/4572"
lang: en
---

# A glance at compiler internals: Keep my memset

## Summary

Why Clang/LLVM can delete your memset: tracing llvm.memset through Dead Store Elimination, the risk for code that wipes secrets, and the volatile function-pointer trick that keeps the wipe alive.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **Published:** 2014-06-26T22:00:00Z
- **Original:** https://blog.quarkslab.com/a-glance-at-compiler-internals-keep-my-memset.html
- **Phying News:** https://phying.com/item/4572