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Clang: Remove -Wperf-constraint-implies-noexcept from -Wall. #167540

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Merged
merged 3 commits into from
Nov 13, 2025
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Clang: Remove -Wperf-constraint-implies-noexcept from -Wall. #167540

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12dc263
Clang: Remove `-Wperf-constraint-implies-noexcept` from `-Wall`.
Nov 11, 2025
0212ff5
Revert formatting change and release note move. Fix test broken by th…
Nov 11, 2025
9190685
pedantic -> nit-picky
Nov 13, 2025
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3 changes: 2 additions & 1 deletion clang/docs/ReleaseNotes.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -350,6 +350,8 @@ Improvements to Clang's diagnostics
Moved the warning for a missing (though implied) attribute on a redeclaration into this group.
Added a new warning in this group for the case where the attribute is missing/implicit on
an override of a virtual method.
- Fixed several false positives and false negatives in function effect (`nonblocking`) analysis. (#GH166078) (#GH166101) (#GH166110)
- Remove ``-Wperf-constraint-implies-noexcept`` from ``-Wall``.
- Implemented diagnostics when retrieving the tuple size for types where its specialization of `std::tuple_size`
produces an invalid size (either negative or greater than the implementation limit). (#GH159563)
- Fixed fix-it hint for fold expressions. Clang now correctly places the suggested right
Expand Down Expand Up @@ -482,7 +484,6 @@ Bug Fixes to Attribute Support
- Fix a crash when the function name is empty in the `swift_name` attribute. (#GH157075)
- Fixes crashes or missing diagnostics with the `device_kernel` attribute. (#GH161905)
- Fix handling of parameter indexes when an attribute is applied to a C++23 explicit object member function.
- Fixed several false positives and false negatives in function effect (`nonblocking`) analysis. (#GH166078) (#GH166101) (#GH166110)

Bug Fixes to C++ Support
^^^^^^^^^^^^^^^^^^^^^^^^
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6 changes: 3 additions & 3 deletions clang/include/clang/Basic/DiagnosticGroups.td
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Expand Up @@ -1312,9 +1312,9 @@ def Consumed : DiagGroup<"consumed">;
// Note that putting warnings in -Wall will not disable them by default. If a
// warning should be active _only_ when -Wall is passed in, mark it as
// DefaultIgnore in addition to putting it here.
def All : DiagGroup<"all", [Most, Parentheses, Switch, SwitchBool,
MisleadingIndentation, PackedNonPod,
VLACxxExtension, PerfConstraintImpliesNoexcept]>;
def All
: DiagGroup<"all", [Most, Parentheses, Switch, SwitchBool,
MisleadingIndentation, PackedNonPod, VLACxxExtension]>;

// Warnings that should be in clang-cl /w4.
def : DiagGroup<"CL4", [All, Extra]>;
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