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| author | Sylvestre Ledru <sylvestre@debian.org> | 2013-11-18 13:23:07 +0000 |
|---|---|---|
| committer | Sylvestre Ledru <sylvestre@debian.org> | 2013-11-18 13:23:07 +0000 |
| commit | 762e567ee54171662111534108aebf8f1c0b303c (patch) | |
| tree | 7ed8e4850011adaed862edc434579e49206eee90 /docs/ReleaseNotes.rst | |
| parent | f696538f5e79a285cc453eba2eacdb3edab16cca (diff) | |
| download | clang-762e567ee54171662111534108aebf8f1c0b303c.tar.gz clang-762e567ee54171662111534108aebf8f1c0b303c.tar.bz2 clang-762e567ee54171662111534108aebf8f1c0b303c.tar.xz | |
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)
Differential Revision: http://llvm-reviews.chandlerc.com/D2212
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@195009 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 |