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author | Sylvestre Ledru <sylvestre@debian.org> | 2013-11-15 15:39:14 +0000 |
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committer | Sylvestre Ledru <sylvestre@debian.org> | 2013-11-15 15:39:14 +0000 |
commit | eb4d7c3fceed6c6e4151489c0572cff36500db78 (patch) | |
tree | 1d459aa7bc8b949ec304c9d645d7f6609dd6b403 /docs/ReleaseNotes.rst | |
parent | 71940883821bd55028f4c2773de10a532c1d8aea (diff) | |
download | clang-eb4d7c3fceed6c6e4151489c0572cff36500db78.tar.gz |
Using an invalid -O falls back on -O3 instead of an error
Summary:
Currently with clang:
$ clang -O20 foo.c
error: invalid value '20' in '-O20'
With the patch:
$ clang -O20 foo.c
warning: optimization level '-O20' is unsupported; using '-O3' instead.
1 warning generated.
This matches the gcc behavior (with a warning added)
Pass all tests:
Testing: 0 .. 10.. 20.. 30.. 40.. 50.. 60.. 70.. 80.. 90..
Testing Time: 94.14s
Expected Passes : 6721
Expected Failures : 20
Unsupported Tests : 17
(which was not the case of http://llvm-reviews.chandlerc.com/D2125)
Reviewers: chandlerc, rafael, rengolin, hfinkel
Reviewed By: rengolin
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D2152
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194817 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs/ReleaseNotes.rst')
-rw-r--r-- | docs/ReleaseNotes.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/docs/ReleaseNotes.rst b/docs/ReleaseNotes.rst index 7d63744bdf..597d48142f 100644 --- a/docs/ReleaseNotes.rst +++ b/docs/ReleaseNotes.rst @@ -77,7 +77,8 @@ New Compiler Flags - Clang no longer special cases -O4 to enable lto. Explicitly pass -flto to enable it. -- Command line "clang -O3 -flto a.c -c" and "clang -emit-llvm a.c -c" +- Clang no longer fails on >= -O5. Uses -O3 instead. +- Command line "clang -O3 -flto a.c -c" and "clang -emit-llvm a.c -c" are no longer equivalent. - Clang now errors on unknown -m flags (``-munknown-to-clang``), unknown -f flags (``-funknown-to-clang``) and unknown |