What’s New in Visual Studio 2013 for C++ DevelopersTarek MadkourGroup Program Manager – Visual C++2-305

performancecompatibilityportability

1. Performance2. Compatibility3. Portability

Agenda

0. Windows 8.1 Tools

4. Productivity

0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity

Agenda

Connected Windows Store AppsVisual Studio 2013 makes it easier to:• Update your app tile using mobile services• Send push notifications to your Windows Store app• Accessing Azure mobile services backend capabilities

How?• New C++ library for Azure mobile services• Integrated VS tools

Better XAML DesignerNew and updated templatesImproved XAML editorRulers and dynamic guidesNew Windows 8.1 controlsImproved Designer performanceBetter in-place style and template editing

Powerful Graphics DebuggingVS2012 introduced DirectX-based Graphics debugging tools in VS Professional, Premium and Ultimate

VS2013 adds:• Support in VS Express• Capturing frames from

remote machines• Compute shader

debugging• Faster frame capture

Deeper DiagnosticsDiagnostics hub• XAML UI responsiveness profiling• Energy profiler• CPU profilingBetter WinRT Exception debugging‘Just My Code’ debuggingImproved Async debuggingJavaScript/C++ interop debuggingC#/C++ interop debugging *ARM dump debugging *

C++/CX• Boxed types in WinRT structs value struct Person { IBox<int>^ Age; }

• Overriding ToString() ref struct Person { public: String^ Name; virtual String^ ToString() override { return Name; } }

• Improved WinRT exceptions• Retains stack trace and message

string across the ABI• Developers can specify custom

message strings

• Faster performance• Ref classes instantiate faster, have

more compact layouts in memory• Boxing and factory caching

improved to speed up XAML scenarios

• Facilitated inlining and other code optimizations

Windows 8.1 Toolsdemo

0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity

Agenda

Performance Optimizations RecapCompilation Unit Optimizations• /O2 and friends

Whole Program Optimizations• /GL and /LTCG

.cpp

.cpp .obj

.obj.exe

.cpp

.cpp .obj

.obj.exe

.cpp

.cpp .obj

.obj.exe

Run TrainingScenario

s.exe

Profile-Guided Optimizations• /LTCG:PGI and /LTCG:PGO

Automatic VectorizationVS 2012:• Uses “vector” instructions where

possible in loops

VS 2013 adds:• Statement level vectorization• Permutation of perfect loop nests• Range propagation optimizations• Support for more operations:

min/max, converts, shifts, byteswap, averaging

• Reductions into array elements• __restrict support for vector alias

checking• Improvements to data dependence

analysis• C++ pointer vectorization• Gather / scatter optimizations

for (i = 0; i < 1000; i++) { A[i] = B[i] + C[i];}

+r1 r2

r3

add r3, r1, r2

SCALAR(1 operation)

v1 v2

v3+

vectorlength

vadd v3, v1, v2

VECTOR(N operations)

Automatic Vectorization// STL – pointers everywhere; not even a loop counter variablevoid transform1(const int * first1, const int * last1, const int * first2, int * result) { while (first1 != last1) { //converted to integer *result++ = *first1++ + *first2++; // make these array references }}// DirectX – no loops here! Vectorize operations on adjacent memory cellsvoid four_vector_example(XMVECTOR V) { XMVECTOR Result;    Result.vector4_f32[0] = 1.f / V.vector4_f32[0];    Result.vector4_f32[1] = 1.f / V.vector4_f32[1];    Result.vector4_f32[2] = 1.f / V.vector4_f32[2];    Result.vector4_f32[3] = 1.f / V.vector4_f32[3];    return Result;}

// Machine Vision Libraryvoid machine_vision_filter_example (int *A, int boxStart) { for (int i = 0; i < 100; i++) A[boxStart + i] = A[boxStart + i] + 1;}

Vector Calling Conventionstruct Particle {    __m256 x;    __m256 y;    __m256 z;    __m256 w;    };Particle __vectorcall foo(Particle a, __m256 scale){  Particle t;    t.x = _mm256_mul_ps(a.x, scale);  t.y = _mm256_mul_ps(a.y, scale);  t.z = _mm256_mul_ps(a.z, scale);  t.w = _mm256_mul_ps(a.w, scale);    return t;}

Reduces instruction count

Minimizes stack allocation

Use /Gv for whole module

C++ AMPIn VS2012:• Programming model for heterogeneous computing• Allowed C++ code to run on the GPU for general-purpose computation• STL-like library for multidimensional data

VS2013 adds:• Shared memory support to eliminate/reduce copying of data between CPU and GPU• Enhanced texture support: texture sampling, mipmap support and staging textures• C++ AMP debugging on Win7 and side-by-side CPU/GPU debugging• Faster C++ AMP runtime: improved copy performance, reduce launch overhead• Better DirectX interop support• Improved C++ AMP runtime diagnostics• Improvements to array_view APIs

0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity

Agenda

C++11

We have a lot here …

see Herb’s talk on Friday at noon.

0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity

Agenda

C++ REST SDKCloud-based client-server communications library for C++

Basics:• Connecting and interacting with RESTful services• Uncompromised performance and productivity• Asynchrony for responsiveness and scalability• Uses modern C++11 patterns• Cross-platform enabled and OSS

C++ REST SDKHTTP Client to send requests and handle responsesJSON library for constructing, parsing and serializing JSON objects.Asynchronous Streams and Stream Buffers for reading/writing bytes to/from an underlying medium.

http://casablanca.codeplex.com

Basic HTTP Clienthttp_client client(L"http://www.myhttpserver.com");http_request request(methods::GET);

client.request(request).then([](http_response response){ // Perform actions here to inspect the HTTP response... if(response.status_code() == status_codes::OK) { }});

Make an HTTP request to get a JSON valuevoid RequestJSONValue()

{ http_client client(L"http://www.myhttpserver.com"); client.request(methods::GET).then([](http_response response) { if(response.status_code() == status_codes::OK) { return response.extract_json(); } // Handle error cases, for now return null json value... return task_from_result(json::value()); }) .then([](json::value v) { // Perform actions here to process the JSON value... });}

C++ REST SDKdemo

0. Windows 8.1 Tools1. Performance2. Compatibility3. Portability4. Productivity

Agenda

NuGetEasy acquisition and usage of compatible libraries in C++ projects

Library vendors can expose their libraries as NuGet packages using available toolshttp://blogs.msdn.com/b/vcblog/archive/2013/04/26/nuget-for-c.aspx

IDE Enhancementsdemo

Code Formatting

Configurable options for indentation, space, new lines and wrapping

Automatically applied while typing, pasting or formatting

Header / Code Switching

Brace Completion

Code PeekView type definitions without leaving the current open file

Code Analysis UI Enhancements

Filter on categories and sort on various fields to help focus on important problems first

Async DebuggingSupports Windows Store and Desktop appsRequires Windows 8.1Enhancements to the Call Stack and Tasks window Answers the questions “Why am I here?” & “What is going on right now?”

“Just My Code” debuggingHelps developer focus on code they authored

Call Stack window hides non-user code

Non-user code defined in configurable .natjmc file

Not used during stepping

Interop debuggingMultiple flavors of interop debugging enabled:• JavaScript / C++• C# / VB / C++ • CPython / C++• GPU / CPU

Enable by choosing an option in the Project PropertiesBreak in the debugger in either C++ or JS/C#/VB/Python code• Breakpoint | Exception | Break All (pause icon)Inspect state, e.g. in Locals, Call Stack

ResourcesVisual C++ Blog

http://blogs.msdn.com/vcblog

Visual C++ Developer Centerhttp://msdn.microsoft.com/en-us/visualc/default.aspx

Other C++ Sessions at //BUILDThu 11:30am

3-141 DirectX Graphics Debugging Tools

Fri 10:30am

4-329 Native Code Performance and Memory: The Elephant in the CPU

2-211 Windows Phone: Using Native (C++) Code in Your Apps

Fri 12:00pm

2-306 The Future of C++

3-308 C++/CX Best Practices

What?• Are you interested

in having an impact on the future user experiences in Visual Studio? Come help us shape the future.

Give us your feedback!When & Where?• Schedule a time

with us vsdr@microsoft.com

• Room 254 South

Moscone, West Mezzanine Level

Why?• Your input and

feedback will influence future Microsoft Visual Studio tools

Give us your feedback!

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