mirror of
https://github.com/RPCS3/llvm.git
synced 2024-11-30 23:21:04 +00:00
95ed232373
Summary: Fix a few typos and update names to match current source. Differential Revision: https://reviews.llvm.org/D37948 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313473 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.6 KiB
ReStructuredText
49 lines
1.6 KiB
ReStructuredText
===========================================================================
|
|
Building a JIT: Extreme Laziness - Using Compile Callbacks to JIT from ASTs
|
|
===========================================================================
|
|
|
|
.. 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 4 Introduction
|
|
======================
|
|
|
|
Welcome to Chapter 4 of the "Building an ORC-based JIT in LLVM" tutorial. This
|
|
chapter introduces the Compile Callbacks and Indirect Stubs APIs and shows how
|
|
they can be used to replace the CompileOnDemand layer from
|
|
`Chapter 3 <BuildingAJIT3.html>`_ with a custom lazy-JITing scheme that JITs
|
|
directly from Kaleidoscope ASTs.
|
|
|
|
**To be done:**
|
|
|
|
**(1) Describe the drawbacks of JITing from IR (have to compile to IR first,
|
|
which reduces the benefits of laziness).**
|
|
|
|
**(2) Describe CompileCallbackManagers and IndirectStubManagers in detail.**
|
|
|
|
**(3) Run through the implementation of addFunctionAST.**
|
|
|
|
Full Code Listing
|
|
=================
|
|
|
|
Here is the complete code listing for our running example that JITs lazily from
|
|
Kaleidoscope ASTS. To build this example, use:
|
|
|
|
.. code-block:: bash
|
|
|
|
# Compile
|
|
clang++ -g toy.cpp `llvm-config --cxxflags --ldflags --system-libs --libs core orcjit native` -O3 -o toy
|
|
# Run
|
|
./toy
|
|
|
|
Here is the code:
|
|
|
|
.. literalinclude:: ../../examples/Kaleidoscope/BuildingAJIT/Chapter4/KaleidoscopeJIT.h
|
|
:language: c++
|
|
|
|
`Next: Remote-JITing -- Process-isolation and laziness-at-a-distance <BuildingAJIT5.html>`_
|