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| author | Dong-hee Na <donghee.na92@gmail.com> | 2020-09-28 20:41:23 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-09-28 20:41:23 (GMT) |
| commit | 24ba3b0df5e5f2f237d7b23b4017ba12f16320ae (patch) | |
| tree | 11ef620ae2b48d6faf15bfc502c1308ba000f710 | |
| parent | ff9147d93b868f0e13b9fe14e2a76c2879f6787b (diff) | |
| download | cpython-24ba3b0df5e5f2f237d7b23b4017ba12f16320ae.zip cpython-24ba3b0df5e5f2f237d7b23b4017ba12f16320ae.tar.gz cpython-24ba3b0df5e5f2f237d7b23b4017ba12f16320ae.tar.bz2 | |
bpo-41875: Use __builtin_unreachable when possible (GH-22433)
| -rw-r--r-- | Include/pymacro.h | 4 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Build/2020-09-28-21-56-51.bpo-38249.uzMCaZ.rst | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/Include/pymacro.h b/Include/pymacro.h index 856cae7..202b936 100644 --- a/Include/pymacro.h +++ b/Include/pymacro.h @@ -118,7 +118,9 @@ "We've reached an unreachable state. Anything is possible.\n" \ "The limits were in our heads all along. Follow your dreams.\n" \ "https://xkcd.com/2200") -#elif defined(__GNUC__) || defined(__clang__) || defined(__INTEL_COMPILER) +#elif defined(__GNUC__) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)) +# define Py_UNREACHABLE() __builtin_unreachable() +#elif defined(__clang__) || defined(__INTEL_COMPILER) # define Py_UNREACHABLE() __builtin_unreachable() #elif defined(_MSC_VER) # define Py_UNREACHABLE() __assume(0) diff --git a/Misc/NEWS.d/next/Build/2020-09-28-21-56-51.bpo-38249.uzMCaZ.rst b/Misc/NEWS.d/next/Build/2020-09-28-21-56-51.bpo-38249.uzMCaZ.rst new file mode 100644 index 0000000..3e409ec --- /dev/null +++ b/Misc/NEWS.d/next/Build/2020-09-28-21-56-51.bpo-38249.uzMCaZ.rst @@ -0,0 +1,2 @@ +Update :c:macro:`Py_UNREACHABLE` to use __builtin_unreachable() if only the +compiler is able to use it. Patch by Dong-hee Na. |