Charles Bailey introduces x86 assembly language to help C++ programmers understand what compilers do with their source code.
CppCon.org
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Presentation Slides, PDFs, Source Code and other presenter materials are available at: github.com/CppCon/CppCon2017
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This tutorial is an introduction to x86 assembly language aimed at C++ programmers of all levels who are interested in what the compiler does with their source code.
C++ is a programming language that cares about performance. As with any technology, a deep understanding of C++ is helped by knowledge of the layer below, and this means knowledge of assembly language. Knowing what the compiler does with your source code and the limitations under which it operates can inform how you design and write your C++.
We learn how to generate, inspect and interpret the assembly language for your C++ functions and programs. We take a short tour of common assembly instructions and constructs, and discover why extreme caution should be exercised if we are trying to infer performance characteristics from a simple inspection of assembly code.
Starting with a simple `operator+` for a user-defined class, we take a look at how interface and implementation choices affect the generated assembly code and observe the effect of copy elisions and related optimizations that compilers commonly perform.
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Charles Bailey: Bloomberg LP, Software Engineer
Charles Bailey is a software developer at Bloomberg LP. He works in Developer Experience Engineering London, where he consults and advises on all aspects of software development. His previous experience in software development has included roles in many areas, including business intelligence, data warehousing, defence, radar and financial derivatives. In addition to C++, Charles has a keen interest in source control in general and Git in particular. He can be found answering questions on both subjects on Stack Overflow and in person.
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Videos Filmed & Edited by Bash Films: BashFilms.com
Work at Hudson River Trading (HRT): tinyurl.com/safxfctf
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Videos Filmed & Edited by Bash Films: BashFilms.com
Why it's here
2 people recommend this
What people say. Recommended as a great introduction to reading compiler-generated assembly for C and C++ developers.
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u/skeetoin r/C_Programming • Recommends
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Every year you can think of a subset of CppCon as being like a C
conference. There are a bunch of presentations that are entirely or
mostly relevant to C, and not just in a broader sense of being relevant
to *any* language. I plucked out a bunch from CppCon 2017 for you. These
are *roughly* ordered from best to worst:
* [Matt Godbolt “What Has My Compiler Done for Me Lately? Unbolting the Compiler's Lid”]
* Chandler Carruth “Going Nowhere Faster”
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* John Regehr “Undefined Behavior in 2017 (part 2 of 2)”
* Piotr Padlewski “Undefined Behaviour is awesome!”
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