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Set enable-experimental-jit=yes-off on Python 3.13 / Linux #538

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Merged
merged 3 commits into from
Feb 27, 2025
Merged

Set enable-experimental-jit=yes-off on Python 3.13 / Linux #538

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85af95a
Set `enable-experimental-jit=yes-off` on Python 3.13+
zanieb Feb 25, 2025
5664603
Bump to LLVM 19 on 3.13
zanieb Feb 26, 2025
28c8fd9
Limit to 3.13 / Linux
zanieb Feb 26, 2025
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16 changes: 16 additions & 0 deletions cpython-unix/build-cpython.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -424,6 +424,22 @@ if [ -n "${CPYTHON_OPTIMIZED}" ]; then
if [[ -n "${PYTHON_MEETS_MINIMUM_VERSION_3_12}" && -n "${BOLT_CAPABLE}" ]]; then
CONFIGURE_FLAGS="${CONFIGURE_FLAGS} --enable-bolt"
fi

# Allow users to enable the experimental JIT on 3.13+
if [[ -n "${PYTHON_MEETS_MINIMUM_VERSION_3_13}" ]]; then

# The JIT build is failing on macOS and 3.14+ due to compiler errors
# Only enable on Linux / 3.13 until that's fixed upstream
if [[ -n "${PYTHON_MEETS_MAXIMUM_VERSION_3_13}" && "${PYBUILD_PLATFORM}" != "macos" ]]; then
CONFIGURE_FLAGS="${CONFIGURE_FLAGS} --enable-experimental-jit=yes-off"
fi

if [[ -n "${PYTHON_MEETS_MAXIMUM_VERSION_3_13}" ]]; then
# On 3.13, LLVM 18 is hard-coded into the configure script. Override it to our toolchain
# version.
patch -p1 -i "${ROOT}/patch-jit-llvm-19.patch"
fi
fi
fi

if [ -n "${CPYTHON_LTO}" ]; then
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12 changes: 12 additions & 0 deletions cpython-unix/patch-jit-llvm-19.patch
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@@ -0,0 +1,12 @@
diff --git a/Tools/jit/_llvm.py b/Tools/jit/_llvm.py
--- a/Tools/jit/_llvm.py
+++ b/Tools/jit/_llvm.py
@@ -8,7 +8,7 @@
import subprocess
import typing

-_LLVM_VERSION = 18
+_LLVM_VERSION = 19
_LLVM_VERSION_PATTERN = re.compile(rf"version\s+{_LLVM_VERSION}\.\d+\.\d+\S*\s+")

_P = typing.ParamSpec("_P")