ilusha/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2026-09-29 09:40:29 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

gh-118335: Configure Tier 2 interpreter at build time (#118339)

Browse source 
The code for Tier 2 is now only compiled when configured
with `--enable-experimental-jit[=yes|interpreter]`.

We drop support for `PYTHON_UOPS` and -`Xuops`,
but you can disable the interpreter or JIT
at runtime by setting `PYTHON_JIT=0`.
You can also build it without enabling it by default
using `--enable-experimental-jit=yes-off`;
enable with `PYTHON_JIT=1`.

On Windows, the `build.bat` script supports
`--experimental-jit`, `--experimental-jit-off`,
`--experimental-interpreter`.

In the C code, `_Py_JIT` is defined as before
when the JIT is enabled; the new variable
`_Py_TIER2` is defined when the JIT *or* the
interpreter is enabled. It is actually a bitmask:
1: JIT; 2: default-off; 4: interpreter.
This commit is contained in:
Guido van Rossum 2024-04-30 18:26:34 -07:00 • committed by GitHub
parent 9c468e2c5d
commit 7d83f7bcc4
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
32 changed files with 181 additions and 42 deletions
Download patch file Download diff file Expand all files Collapse all files

1
Tools/cases_generator/analyzer.py
View file

@ -411,6 +411,7 @@ NON_ESCAPING_FUNCTIONS = (
"PyCell_New",
"PyFloat_AS_DOUBLE",
"_PyFrame_PushUnchecked",
"Py_FatalError",
)
ESCAPING_FUNCTIONS = (

6
Tools/jit/README.md
View file

@ -7,18 +7,18 @@ This version of CPython can be built with an experimental just-in-time compiler.
The JIT compiler does not require end users to install any third-party dependencies, but part of it must be *built* using LLVM[^why-llvm]. You are *not* required to build the rest of CPython using LLVM, or even the same version of LLVM (in fact, this is uncommon).
LLVM version 16 is required. Both `clang` and `llvm-readobj` need to be installed and discoverable (version suffixes, like `clang-16`, are okay). It's highly recommended that you also have `llvm-objdump` available, since this allows the build script to dump human-readable assembly for the generated code.
LLVM version 18 is required. Both `clang` and `llvm-readobj` need to be installed and discoverable (version suffixes, like `clang-18`, are okay). It's highly recommended that you also have `llvm-objdump` available, since this allows the build script to dump human-readable assembly for the generated code.
It's easy to install all of the required tools:
### Linux
Install LLVM 16 on Ubuntu/Debian:
Install LLVM 18 on Ubuntu/Debian:
```sh
wget https://apt.llvm.org/llvm.sh
chmod +x llvm.sh
sudo ./llvm.sh 16
sudo ./llvm.sh 18
```
### macOS