[llvm] r270917 - [Kaleidoscope][BuildingAJIT] Add docs for Chapter 3 of the Building A JIT

Lang Hames via llvm-commits llvm-commits at lists.llvm.org
Thu May 26 14:17:06 PDT 2016

Author: lhames
Date: Thu May 26 16:17:06 2016
New Revision: 270917

URL: http://llvm.org/viewvc/llvm-project?rev=270917&view=rev
[Kaleidoscope][BuildingAJIT] Add docs for Chapter 3 of the Building A JIT


Added: llvm/trunk/docs/tutorial/BuildingAJIT3.rst
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/docs/tutorial/BuildingAJIT3.rst?rev=270917&view=auto
--- llvm/trunk/docs/tutorial/BuildingAJIT3.rst (added)
+++ llvm/trunk/docs/tutorial/BuildingAJIT3.rst Thu May 26 16:17:06 2016
@@ -0,0 +1,47 @@
+Building a JIT: Per-function Lazy Compilation
+.. contents::
+   :local:
+**This tutorial is under active development. It is incomplete and details may
+change frequently.** Nonetheless we invite you to try it out as it stands, and
+we welcome any feedback.
+Chapter 3 Introduction
+Welcome to Chapter 3 of the "Building an ORC-based JIT in LLVM" tutorial. This
+chapter discusses lazy JITing and shows you how to enable it by adding an ORC
+CompileOnDemand layer the JIT from `Chapter 2 <BuildingAJIT2.html>`_.
+**To be done:**
+**(1) Describe lazy function-at-a-time JITing and how it differs from the kind
+of eager module-at-a-time JITing that we've been doing so far. **
+**(2) Discuss CompileCallbackManagers and IndirectStubManagers.**
+**(3) Describe CompileOnDemandLayer (automates these components and builds stubs
+and lazy compilation callbacks for IR) and how to add it to the JIT. **
+Full Code Listing
+Here is the complete code listing for our running example with a CompileOnDemand
+layer added to enable lazy function-at-a-time compilation. To build this example, use:
+.. code-block:: bash
+    # Compile
+    clang++ -g toy.cpp `llvm-config --cxxflags --ldflags --system-libs --libs core orc native` -O3 -o toy
+    # Run
+    ./toy
+Here is the code:
+.. literalinclude:: ../../examples/Kaleidoscope/BuildingAJIT/Chapter3/KaleidoscopeJIT.h
+   :language: c++
+`Next: Extreme Laziness -- Using Compile Callbacks to JIT directly from ASTs <BuildingAJIT4.html>`_

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