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![Vectorization of control-flow / Bit-test merging
void blackscholes(float* input, int *signArray, int n)
{
for (int i = 0; i < n; i++) {
float InputX = input[i];
int sign;
if (InputX < 0.0f) {
InputX = -InputX;
sign = 1;
} else {
sign = 0;
}
input[i] = InputX;
signArray[i] = sign;
}
}
mask = InputX < 0.0f ? 0xFFFFFFFF : 0;
InputX = (mask & -InputX) | (~mask & InputX);
sign = (mask & 1) | (~mask & 0);
Branch를 제거하여 최적화된 코드
벤치마크 테스트 결과
300%+ 속도 개선](https://image.slidesharecdn.com/vs2015cnewfeatures-171202130629/85/VS2015-C-new-features-22-320.jpg)
Uploaded by명신 김
VS2015 C++ new features
This document summarizes Bjarne Stroustrup's keynote at Cppcon 2016 and new features in Visual Studio 2015. It discusses improvements to build times with features like whole program optimization and linker optimizations. It also covers compiler optimizations like vectorization of control flow and loop-if unswitching. New C++17 language features and the standalone Visual C++ build tools are also mentioned. Finally, it demonstrates debugging and profiling improvements in Visual Studio 2015.
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VS2015 C++ new features
- 1.
- 2. Cppcon 2016 KeynoteBjarne Stroustrup
- 3. VS 2015? 좋겠죠 근데우린 못바꿔요
- 4.
- 6. • Native Multi-targeting •Round-tripping
- 7.
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- 15.
- 16. "Within C++ isa smaller, simpler, safer language struggling to get out.“ - Bjarne Stroustrup
- 17.
- 18. C++17 constexpr Expression SFINAETwo-phase lookup Variable templates Extended constexpr NSDMI for aggregates coroutines modules concepts Nested namespace Folded expressions
- 19. Compile Fast &Link Fast Generate Fast & Secure Code
- 20. • 더욱 빨라진Whole Program Optimized builds
- 21. • 링커 개선및 신규 옵션 제공 680 138 84 573 68 61 8 327 KINE C T S PO R TS R IV AL ( XBO X O NE ) F O R Z A ( XBO X O NE ) DE S TINY ( XBO X O NE ) C HR O ME CLEAN LINK TIMES WITH VS2015 (SEC) VS2013 RTM VS2015 RTM • /Debug:fastlink • /Zc:inline • Incremental linking for static libraries • Linker multi-threading VS2015 링커 신규 옵션
- 22. Vectorization of control-flow/ Bit-test merging void blackscholes(float* input, int *signArray, int n) { for (int i = 0; i < n; i++) { float InputX = input[i]; int sign; if (InputX < 0.0f) { InputX = -InputX; sign = 1; } else { sign = 0; } input[i] = InputX; signArray[i] = sign; } } mask = InputX < 0.0f ? 0xFFFFFFFF : 0; InputX = (mask & -InputX) | (~mask & InputX); sign = (mask & 1) | (~mask & 0); Branch를 제거하여 최적화된 코드 벤치마크 테스트 결과 300%+ 속도 개선
- 23. • Loop-if unswitching for(int i = 0; i < 100; i++) if (some_invariant_condition) ... Source code: if (some_invariant_condition) for (int i = 0; i < 100; i++) ... Optimized as if:
- 24.
- 25. • /Guard:cf –새로운 컴파일 스위치
- 26. • Intel MemoryProtection Extension(MPX) 지원
- 27. Incredibuild and VisualStudio 6:32 4:42 0:47 Visual Studio IncrediBuild (Predicted) IncrediBuild (With Helpers*) Ace open source 빌드 벤치마크 일반적으로 10% 이상 빌드 속도 개선
- 28. • 독립 설치가능한 compiler, libraries, scripts • Standalone Compiler • Visual Studio Code - ext install cpptools • Team Build Server • Python/Node.js/Rust 독립 Visual C++ Build 도구 지원 http://landinghub.visualstudio.com/visual-cpp-build-tools
- 29.
- 30.
- 31. • • • Set nextstatement • • • • • • • • • • • • • • • PerfTips • Integrated CPU Profiling • Integrated Memory Profiling • •
- 32.
- 33. Visual Studio 2015Video Visual C++ 포팅 및 업그레이드 가이드 Stuck on an older toolset version? Move to Visual Studio 2015 without upgrading your toolset Visual C++ Build Tool Debugging Tips and Tricks for C++ in Visual Studio C++ Edit and Continue in visual studio 2015 update Compiler improvement in vs 2015 update 3 MFC Dynamic Dialog Layout Speeding up the Incremental Developer Build Scenario
Editor's Notes
- #19 https://blogs.msdn.microsoft.com/vcblog/2016/09/13/visual-c-for-linux-1-0-5-updates/ Visual C++ for Linux Development https://visualstudiogallery.msdn.microsoft.com/725025cf-7067-45c2-8d01-1e0fd359ae6e Try out the latest C++ compiler toolset without waiting for the next update of Visual Studio https://blogs.msdn.microsoft.com/vcblog/2016/04/26/stay-up-to-date-with-the-visual-c-tools-on-nuget/ Announcing Visual C++ Build Tools 2015 – standalone C++ tools for build environments https://blogs.msdn.microsoft.com/vcblog/2015/11/02/announcing-visual-c-build-tools-2015-standalone-c-tools-for-build-environments/ Improvements for C++ Edit and Continue in Visual Studio 2015 Update 1 https://blogs.msdn.microsoft.com/vcblog/2015/11/30/improvements-for-c-edit-and-continue-in-visual-studio-2015-update-1/ Memory Profiling in Visual C++ 2015 https://blogs.msdn.microsoft.com/vcblog/2015/10/21/memory-profiling-in-visual-c-2015/ Debug Visualizers in Visual C++ 2015 https://blogs.msdn.microsoft.com/vcblog/2015/09/28/debug-visualizers-in-visual-c-2015/ Rejuvenating the Microsoft C/C++ Compiler https://blogs.msdn.microsoft.com/vcblog/2015/09/25/rejuvenating-the-microsoft-cc-compiler/ Stuck on an older toolset version? Move to Visual Studio 2015 without upgrading your toolset https://blogs.msdn.microsoft.com/vcblog/2016/02/24/stuck-on-an-older-toolset-version-move-to-visual-studio-2015-without-upgrading-your-toolset/
- #38 Debugging Tips and Tricks for C++ in Visual Studio https://blogs.msdn.microsoft.com/vcblog/2016/07/11/debugging-tips-and-tricks-for-c-in-visual-studio/ https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/C-Plus-Plus-Debugging-Tips-and-Tricks C++ Edit and Continue in visual studio 2015 update https://blogs.msdn.microsoft.com/vcblog/2016/07/01/c-edit-and-continue-in-visual-studio-2015-update-3/ C++ - Native Memory Diagnostics https://channel9.msdn.com/Series/ConnectOn-Demand/216 Native Memory Diagnostics in CTP 5 https://blogs.msdn.microsoft.com/vcblog/2015/01/29/native-memory-diagnostics-in-ctp-5/ Developer Assistant now supports C++ https://blogs.msdn.microsoft.com/visualstudio/2016/07/13/developer-assistant-supports-cpp/ Macros extension: VS 2015 support and open-sourced https://blogs.msdn.microsoft.com/visualstudio/2016/05/11/macros-extension-open-sourced-in-visual-studio-2015/
- #46 MFC Dynamic Dialog Layout https://blogs.msdn.microsoft.com/vcblog/2015/04/29/mfc-dynamic-dialog-layout/
- #49 Improving the C++ Developer Experience in Visual Studio 2015 https://blogs.msdn.microsoft.com/visualstudio/2016/04/13/improving-the-c-developer-experience-in-visual-studio-2015/ Visual C++ 2015 Migration Documentation Update https://blogs.msdn.microsoft.com/vcblog/2016/09/19/visual-c-2015-migration-documentation-update/ Microsoft/VCSamples https://github.com/Microsoft/vcsamples Microsoft/VCSamples https://github.com/Microsoft/VCSamples/wiki Announcing the VC++ 2015 Migration Virtual Development Laboratory https://blogs.msdn.microsoft.com/vcblog/2016/03/30/announcing-the-vc-2015-migration-virtual-development-laboratory/ Visual C++ for Linux 1.0.5 Updates https://blogs.msdn.microsoft.com/vcblog/2016/09/13/visual-c-for-linux-1-0-5-updates/ Visual C++ for Linux Development https://visualstudiogallery.msdn.microsoft.com/725025cf-7067-45c2-8d01-1e0fd359ae6e Debugging Tips and Tricks for C++ in Visual Studio https://blogs.msdn.microsoft.com/vcblog/2016/07/11/debugging-tips-and-tricks-for-c-in-visual-studio/ https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/C-Plus-Plus-Debugging-Tips-and-Tricks C++ Edit and Continue in visual studio 2015 update https://blogs.msdn.microsoft.com/vcblog/2016/07/01/c-edit-and-continue-in-visual-studio-2015-update-3/ Visual Studio 2015 update 3 available now https://blogs.msdn.microsoft.com/vcblog/2016/06/28/visual-studio-2015-update-3-available-now/ Release note https://www.visualstudio.com/news/releasenotes/vs2015-update3-vs Compiler improvement in vs 2015 update 3 https://blogs.msdn.microsoft.com/vcblog/2016/06/07/compiler-improvements-in-vs-2015-update-3-rc/ Compiler improvements in VS 2015 Update 2 https://blogs.msdn.microsoft.com/vcblog/2016/02/11/compiler-improvements-in-vs-2015-update-2/ Visual Studio 2015 Update 1 Is Here https://blogs.msdn.microsoft.com/vcblog/2015/12/01/visual-studio-2015-update-1-is-here/ Improving your build times with IncredBuild and Visual Studio https://blogs.msdn.microsoft.com/visualstudio/2015/11/30/improving-your-build-times-with-incredibuild-and-visual-studio-2015/ https://www.incredibuild.com/microsoft-incredibuild-partnership.html, and through two Channel9 videos: What is Incredibuild? and Incredibuild with Visual Studio 2015 Update 1. Coroutines in Visual Studio 2015 – Update 1 https://blogs.msdn.microsoft.com/vcblog/2015/11/30/coroutines-in-visual-studio-2015-update-1/ Improvements for C++ Edit and Continue in Visual Studio 2015 Update 1 https://blogs.msdn.microsoft.com/vcblog/2015/11/30/improvements-for-c-edit-and-continue-in-visual-studio-2015-update-1/ Cpp guideline https://github.com/isocpp/CppCoreGuidelines http://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines Visual Studio 2015 RTM Now Available https://blogs.msdn.microsoft.com/vcblog/2015/07/20/visual-studio-2015-rtm-now-available/ Single-File IntelliSense and other IDE Improvements in VS2015 https://blogs.msdn.microsoft.com/vcblog/2015/04/29/single-file-intellisense-and-other-ide-improvements-in-vs2015/ GoingNative 37: Single-File IntelliSense (+ go watch //build + download VS15 RC!) https://channel9.msdn.com/Shows/C9-GoingNative/GoingNative-37-Single-File-IntelliSense MFC Dynamic Dialog Layout https://blogs.msdn.microsoft.com/vcblog/2015/04/29/mfc-dynamic-dialog-layout/ C++ IDE Improvements https://channel9.msdn.com/Series/ConnectOn-Demand/210 Single File Intellisense Refactoring C++ - Native Memory Diagnostics https://channel9.msdn.com/Series/ConnectOn-Demand/216 Expression SFINAE improvements in VS 2015 Update 3 https://blogs.msdn.microsoft.com/vcblog/2016/06/07/expression-sfinae-improvements-in-vs-2015-update-3/ Standards version switches in the compiler https://blogs.msdn.microsoft.com/vcblog/2016/06/07/standards-version-switches-in-the-compiler/ Try out the latest C++ compiler toolset without waiting for the next update of Visual Studio https://blogs.msdn.microsoft.com/vcblog/2016/04/26/stay-up-to-date-with-the-visual-c-tools-on-nuget/ Be sure to try out the C++ Quick Fixes extension! https://blogs.msdn.microsoft.com/vcblog/2016/04/06/be-sure-to-try-out-the-cpp-quick-fixes-extension/ C++ Quick Fixes https://visualstudiogallery.msdn.microsoft.com/be91feef-8dc3-4f7a-ac9f-f34e7ca5918f Add missing #include Add using namespace/Fully qualify symbol Online Help Add missing semicolon Insert missing namespace on using statements Replace bad indirection operands Remove break outside of loops or switch Remove multiple storage classes Display peek definition on add #include Announcing the official release of the Visual C++ Build Tools 2015 https://blogs.msdn.microsoft.com/vcblog/2016/03/31/announcing-the-official-release-of-the-visual-c-build-tools-2015/ Announcing Visual C++ Build Tools 2015 – standalone C++ tools for build environments https://blogs.msdn.microsoft.com/vcblog/2015/11/02/announcing-visual-c-build-tools-2015-standalone-c-tools-for-build-environments/ Visual C++ Build Tools http://landinghub.visualstudio.com/visual-cpp-build-tools Visual Studio 2015 Update 1: New Experimental Feature – MPX https://blogs.msdn.microsoft.com/vcblog/2016/01/20/visual-studio-2015-update-1-new-experimental-feature-mpx/ Improvements for C++ Edit and Continue in Visual Studio 2015 Update 1 https://blogs.msdn.microsoft.com/vcblog/2015/11/30/improvements-for-c-edit-and-continue-in-visual-studio-2015-update-1/ New, Improved, and Faster Database Engine https://blogs.msdn.microsoft.com/vcblog/2015/11/11/new-improved-and-faster-database-engine/ Memory Profiling in Visual C++ 2015 https://blogs.msdn.microsoft.com/vcblog/2015/10/21/memory-profiling-in-visual-c-2015/ Debug Visualizers in Visual C++ 2015 https://blogs.msdn.microsoft.com/vcblog/2015/09/28/debug-visualizers-in-visual-c-2015/ C++ Edit and Continue in Visual Studio 2015 https://blogs.msdn.microsoft.com/vcblog/2015/07/22/c-edit-and-continue-in-visual-studio-2015/ MFC Dynamic Dialog Layout https://blogs.msdn.microsoft.com/vcblog/2015/04/29/mfc-dynamic-dialog-layout/ Dynamic Layout https://msdn.microsoft.com/en-us/library/mt270148.aspx Single-File IntelliSense and other IDE Improvements in VS2015 https://blogs.msdn.microsoft.com/vcblog/2015/04/29/single-file-intellisense-and-other-ide-improvements-in-vs2015/ More about resumable functions in C++ https://blogs.msdn.microsoft.com/vcblog/2015/04/29/more-about-resumable-functions-in-c/ C/C++ Code analysis in VS2015 – RC Update https://blogs.msdn.microsoft.com/vcblog/2015/04/27/cc-code-analysis-in-vs2015-rc-update/ Year: 2015 https://blogs.msdn.microsoft.com/vcblog/?m=20152 C/C++ Code analysis in VS2015 https://blogs.msdn.microsoft.com/vcblog/2015/02/24/cc-code-analysis-in-vs2015/ Native Memory Diagnostics in CTP 5 https://blogs.msdn.microsoft.com/vcblog/2015/01/29/native-memory-diagnostics-in-ctp-5/ Developer Assistant now supports C++ https://blogs.msdn.microsoft.com/visualstudio/2016/07/13/developer-assistant-supports-cpp/ Macros extension: VS 2015 support and open-sourced https://blogs.msdn.microsoft.com/visualstudio/2016/05/11/macros-extension-open-sourced-in-visual-studio-2015/ 14 more reasons to download Visual Studio 2015 Update 2 today https://blogs.msdn.microsoft.com/visualstudio/2016/05/06/14-reasons-to-download-visual-studio-2015-update-2-today/ Microsoft Visual Studio 2015 Update 3 (KB3165756) https://msdn.microsoft.com/en-us/library/mt752379.aspx Microsoft Visual Studio 2015 Update 2 (KB3151378) https://msdn.microsoft.com/en-us/library/mt695655.aspx Microsoft Visual Studio 2015 Update 1 (KB3110221) https://msdn.microsoft.com/en-us/library/mt634751.aspx Rejuvenating the Microsoft C/C++ Compiler https://blogs.msdn.microsoft.com/vcblog/2015/09/25/rejuvenating-the-microsoft-cc-compiler/ Stuck on an older toolset version? Move to Visual Studio 2015 without upgrading your toolset https://blogs.msdn.microsoft.com/vcblog/2016/02/24/stuck-on-an-older-toolset-version-move-to-visual-studio-2015-without-upgrading-your-toolset/ Introducing C++ Experimental Editor Tools! https://blogs.msdn.microsoft.com/vcblog/2015/11/03/introducing-c-experimental-editor-tools/ Diagnostic Tools debugger window in Visual Studio 2015 https://blogs.msdn.microsoft.com/visualstudioalm/2015/01/16/diagnostic-tools-debugger-window-in-visual-studio-2015/ IntelliTrace in Visual Studio Enterprise 2015 https://blogs.msdn.microsoft.com/visualstudioalm/2015/01/16/intellitrace-in-visual-studio-ultimate-2015/ Walkthrough of Live Debugging using IntelliTrace in Visual Studio 2015 (Text Editor) https://blogs.msdn.microsoft.com/visualstudioalm/2015/01/16/walkthrough-of-live-debugging-using-intellitrace-in-visual-studio-2015-text-editor/ Walkthrough of Live Debugging using IntelliTrace in Visual Studio 2015 (Social Club) https://blogs.msdn.microsoft.com/visualstudioalm/2015/04/29/walkthrough-of-live-debugging-using-intellitrace-in-visual-studio-2015-social-club/ Memory Usage tool while debugging in Visual Studio 2015 https://blogs.msdn.microsoft.com/visualstudioalm/2014/11/13/memory-usage-tool-while-debugging-in-visual-studio-2015/ Diagnosing Event Handler Leaks with the Memory Usage Tool in Visual Studio 2015 https://blogs.msdn.microsoft.com/visualstudioalm/2015/04/29/diagnosing-event-handler-leaks-with-the-memory-usage-tool-in-visual-studio-2015/ PerfTips: Performance information at-a-glance while debugging with Visual Studio https://blogs.msdn.microsoft.com/visualstudioalm/2014/08/18/perftips-performance-information-at-a-glance-while-debugging-with-visual-studio/ Video PerfTips and the Diagnostic Tools Window https://channel9.msdn.com/Events/Visual-Studio/Visual-Studio-2015-Final-Release-Event/PerfTips-and-the-Diagnostic-Tools-Window Visual Studio 2015 Diagnostic Tools https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/Visual-Studio-2015-Diagnostic-Tools Historical Debugging with IntelliTrace in Visual Studio 2015 https://channel9.msdn.com/Shows/Visual-Studio-Toolbox/Historical-Debugging-with-IntelliTrace-in-Visual-Studio-2015 Debugging Performance Issues Using Visual Studio 2015 https://channel9.msdn.com/Events/dotnetConf/2015/Debugging-Performance-Issues-Using-Visual-Studio-2015 New Breakpoint Configuration Experience in Visual Studio 2015 https://blogs.msdn.microsoft.com/visualstudioalm/2014/10/06/new-breakpoint-configuration-experience-in-visual-studio-2015/ Conditional statements Hit counts Filters Tracepoints The New Exception Settings Window in Visual Studio 2015 https://blogs.msdn.microsoft.com/visualstudioalm/2015/02/23/the-new-exception-settings-window-in-visual-studio-2015/ PerfTips: Performance Information at-a-glance while Debugging with Visual Studio https://blogs.msdn.microsoft.com/visualstudioalm/2014/08/18/perftips-performance-information-at-a-glance-while-debugging-with-visual-studio/ Productivity Power Tools 2015 https://visualstudiogallery.msdn.microsoft.com/34ebc6a2-2777-421d-8914-e29c1dfa7f5d UserVoice https://visualstudio.uservoice.com/forums/121579-visual-studio-2015 Visual C++ for Linux Development https://blogs.msdn.microsoft.com/vcblog/2016/03/30/visual-c-for-linux-development/ C++ Core Guidelines Checkers: Preview of the Lifetime Safety checker https://blogs.msdn.microsoft.com/vcblog/2016/03/31/c-core-guidelines-checkers-preview-of-the-lifetime-safety-checker/ Using C++ Coroutines to simplify async UWP code https://blogs.msdn.microsoft.com/vcblog/2016/04/04/using-c-coroutines-to-simplify-async-uwp-code/ C++ Build Tools https://blogs.msdn.microsoft.com/vcblog/2016/03/31/announcing-the-official-release-of-the-visual-c-build-tools-2015/