diff options
| author | Roman Lebedev <lebedev.ri@gmail.com> | 2017-09-08 13:56:45 +0000 |
|---|---|---|
| committer | Roman Lebedev <lebedev.ri@gmail.com> | 2017-09-08 13:56:45 +0000 |
| commit | 8236567f9839ddb87dc2e5ed1cc952d9eb698259 (patch) | |
| tree | 19772cb1e6400693230ee483d0e7db9cf3804b82 /include/clang/Basic/DiagnosticGroups.td | |
| parent | 9fd63e1a9b0938055b72631fa44b73df27b25b30 (diff) | |
[Sema] Put tautological comparison of unsigned and zero into it's own flag
Summary:
As requested by Sam McCall.
```
$ /build/llvm-build-Clang-release/./bin/clang -c /build/clang/test/Sema/outof-range-constant-compare.c /build/clang/test/Sema/outof-range-constant-compare.c:40:11: warning: comparison of unsigned expression < 0 is always false [-Wtautological-unsigned-zero-compare]
if (a < 0x0000000000000000UL) // expected-warning {{comparison of unsigned expression < 0 is always false}}
~ ^ ~~~~~~~~~~~~~~~~~~~~
```
Reviewers: sammccall, bkramer, djasper, rsmith, rjmccall, aaron.ballman
Reviewed By: sammccall, aaron.ballman
Subscribers: aaron.ballman, cfe-commits
Tags: #clang
Differential Revision: https://reviews.llvm.org/D37620
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@312792 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/clang/Basic/DiagnosticGroups.td')
| -rw-r--r-- | include/clang/Basic/DiagnosticGroups.td | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/clang/Basic/DiagnosticGroups.td b/include/clang/Basic/DiagnosticGroups.td index 5e4693b7ec..bfb503356e 100644 --- a/include/clang/Basic/DiagnosticGroups.td +++ b/include/clang/Basic/DiagnosticGroups.td @@ -427,12 +427,14 @@ def StringCompare : DiagGroup<"string-compare">; def StringPlusInt : DiagGroup<"string-plus-int">; def StringPlusChar : DiagGroup<"string-plus-char">; def StrncatSize : DiagGroup<"strncat-size">; +def TautologicalUnsignedZeroCompare : DiagGroup<"tautological-unsigned-zero-compare">; def TautologicalOutOfRangeCompare : DiagGroup<"tautological-constant-out-of-range-compare">; def TautologicalPointerCompare : DiagGroup<"tautological-pointer-compare">; def TautologicalOverlapCompare : DiagGroup<"tautological-overlap-compare">; def TautologicalUndefinedCompare : DiagGroup<"tautological-undefined-compare">; def TautologicalCompare : DiagGroup<"tautological-compare", - [TautologicalOutOfRangeCompare, + [TautologicalUnsignedZeroCompare, + TautologicalOutOfRangeCompare, TautologicalPointerCompare, TautologicalOverlapCompare, TautologicalUndefinedCompare]>; |