[libc++][test] Enhance ADDITIONAL_COMPILE_FLAGS to work with MSVC
#74974
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@llvm/pr-subscribers-libcxx Author: Stephan T. Lavavej (StephanTLavavej) ChangesFound while running libc++'s tests with MSVC's STL. The Fortunately,
Patch is 26.49 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/74974.diff 36 Files Affected:
diff --git a/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges.replace.pass.cpp b/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges.replace.pass.cpp
index ab2f705bafe9d0..32da9345c97e15 100644
--- a/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges.replace.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.modifying.operations/alg.replace/ranges.replace.pass.cpp
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+// MSVC warning C4244: 'argument': conversion from 'const _Ty2' to 'T', possible loss of data
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4244
+
// <algorithm>
// UNSUPPORTED: c++03, c++11, c++14, c++17
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.equal/equal.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.equal/equal.pass.cpp
index e28cbe2a08de4a..93ca4827a6e54d 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.equal/equal.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.equal/equal.pass.cpp
@@ -19,7 +19,12 @@
// equal(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
// We test the cartesian product, so we sometimes compare differently signed types
-// ADDITIONAL_COMPILE_FLAGS: -Wno-sign-compare
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-sign-compare
+// MSVC warning C4242: 'argument': conversion from 'int' to 'const _Ty', possible loss of data
+// MSVC warning C4244: 'argument': conversion from 'wchar_t' to 'const _Ty', possible loss of data
+// MSVC warning C4310: cast truncates constant value
+// MSVC warning C4389: '==': signed/unsigned mismatch
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4242 /wd4244 /wd4310 /wd4389
#include <algorithm>
#include <cassert>
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp
index b55a852c10cafa..64fcf9976f772c 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/find.pass.cpp
@@ -6,7 +6,9 @@
//
//===----------------------------------------------------------------------===//
-// ADDITIONAL_COMPILE_FLAGS: -Wno-sign-compare
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-sign-compare
+// MSVC warning C4389: '==': signed/unsigned mismatch
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4389
// <algorithm>
diff --git a/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/ranges.find.pass.cpp b/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/ranges.find.pass.cpp
index 22f938f73ae078..3b60495b6667d2 100644
--- a/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/ranges.find.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.nonmodifying/alg.find/ranges.find.pass.cpp
@@ -10,7 +10,10 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17
-// ADDITIONAL_COMPILE_FLAGS: -Wno-sign-compare
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-sign-compare
+// MSVC warning C4242: 'argument': conversion from 'const _Ty' to 'ElementT', possible loss of data
+// MSVC warning C4244: 'argument': conversion from 'const _Ty' to 'ElementT', possible loss of data
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4242 /wd4244
// template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity>
// requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
diff --git a/libcxx/test/std/atomics/atomics.types.generic/general.compile.pass.cpp b/libcxx/test/std/atomics/atomics.types.generic/general.compile.pass.cpp
index 9f2a28256184ce..c43c2e5ac95372 100644
--- a/libcxx/test/std/atomics/atomics.types.generic/general.compile.pass.cpp
+++ b/libcxx/test/std/atomics/atomics.types.generic/general.compile.pass.cpp
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+// MSVC warning C4197: 'volatile std::atomic<operator_hijacker>': top-level volatile in cast is ignored
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4197
+
// UNSUPPORTED: c++03
// XFAIL: availability-synchronization_library-missing
diff --git a/libcxx/test/std/atomics/atomics.types.generic/pointer.compile.pass.cpp b/libcxx/test/std/atomics/atomics.types.generic/pointer.compile.pass.cpp
index 9049beaa9c7897..acc5464e5f690f 100644
--- a/libcxx/test/std/atomics/atomics.types.generic/pointer.compile.pass.cpp
+++ b/libcxx/test/std/atomics/atomics.types.generic/pointer.compile.pass.cpp
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+// MSVC warning C4197: 'volatile std::atomic<operator_hijacker *>': top-level volatile in cast is ignored
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4197
+
// UNSUPPORTED: c++03
// XFAIL: availability-synchronization_library-missing
diff --git a/libcxx/test/std/atomics/atomics.types.generic/trivially_copyable.verify.cpp b/libcxx/test/std/atomics/atomics.types.generic/trivially_copyable.verify.cpp
index 0955707cdcf38f..80e77048ecd858 100644
--- a/libcxx/test/std/atomics/atomics.types.generic/trivially_copyable.verify.cpp
+++ b/libcxx/test/std/atomics/atomics.types.generic/trivially_copyable.verify.cpp
@@ -15,7 +15,7 @@
// is not trivially copyable, however Clang will sometimes emit additional
// errors while trying to instantiate the rest of std::atomic<T>.
// We silence those to make the test more robust.
-// ADDITIONAL_COMPILE_FLAGS: -Xclang -verify-ignore-unexpected=error
+// ADDITIONAL_COMPILE_FLAGS(verify-support): -Xclang -verify-ignore-unexpected=error
#include <atomic>
diff --git a/libcxx/test/std/concepts/concepts.lang/concept.default.init/default_initializable.compile.pass.cpp b/libcxx/test/std/concepts/concepts.lang/concept.default.init/default_initializable.compile.pass.cpp
index 4921a48bcccc17..87c3ed0f8803d9 100644
--- a/libcxx/test/std/concepts/concepts.lang/concept.default.init/default_initializable.compile.pass.cpp
+++ b/libcxx/test/std/concepts/concepts.lang/concept.default.init/default_initializable.compile.pass.cpp
@@ -10,7 +10,7 @@
// We voluntarily use std::default_initializable on types that have redundant
// or ignored cv-qualifiers -- don't warn about it.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-ignored-qualifiers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-ignored-qualifiers
// template<class T>
// concept default_initializable = constructible_from<T> &&
diff --git a/libcxx/test/std/containers/associative/map/map.modifiers/insert_range.pass.cpp b/libcxx/test/std/containers/associative/map/map.modifiers/insert_range.pass.cpp
index 1d7fe7193facf4..6f1c6388408539 100644
--- a/libcxx/test/std/containers/associative/map/map.modifiers/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/associative/map/map.modifiers/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <map>
diff --git a/libcxx/test/std/containers/associative/multimap/multimap.modifiers/insert_range.pass.cpp b/libcxx/test/std/containers/associative/multimap/multimap.modifiers/insert_range.pass.cpp
index c7c05a896bc9f9..c9d259d03efe88 100644
--- a/libcxx/test/std/containers/associative/multimap/multimap.modifiers/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/associative/multimap/multimap.modifiers/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <map>
diff --git a/libcxx/test/std/containers/associative/multiset/insert_range.pass.cpp b/libcxx/test/std/containers/associative/multiset/insert_range.pass.cpp
index 9dd85eea47c290..eb125f1520ec1b 100644
--- a/libcxx/test/std/containers/associative/multiset/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/associative/multiset/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <set>
diff --git a/libcxx/test/std/containers/associative/set/insert_range.pass.cpp b/libcxx/test/std/containers/associative/set/insert_range.pass.cpp
index 1956fc6bd7f3ea..1ae7f7d5cd16e8 100644
--- a/libcxx/test/std/containers/associative/set/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/associative/set/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <set>
diff --git a/libcxx/test/std/containers/sequences/array/array.tuple/get.verify.cpp b/libcxx/test/std/containers/sequences/array/array.tuple/get.verify.cpp
index 9052b4359f6b0a..c93ea75c221dac 100644
--- a/libcxx/test/std/containers/sequences/array/array.tuple/get.verify.cpp
+++ b/libcxx/test/std/containers/sequences/array/array.tuple/get.verify.cpp
@@ -11,7 +11,7 @@
// template <size_t I, class T, size_t N> T& get(array<T, N>& a);
// Prevent -Warray-bounds from issuing a diagnostic when testing with clang verify.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-array-bounds
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-array-bounds
#include <array>
#include <cassert>
diff --git a/libcxx/test/std/containers/unord/unord.map/unord.map.modifiers/insert_range.pass.cpp b/libcxx/test/std/containers/unord/unord.map/unord.map.modifiers/insert_range.pass.cpp
index 8b004336f68cde..f524273bdda03d 100644
--- a/libcxx/test/std/containers/unord/unord.map/unord.map.modifiers/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.map/unord.map.modifiers/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <unordered_map>
diff --git a/libcxx/test/std/containers/unord/unord.multimap/unord.multimap.modifiers/insert_range.pass.cpp b/libcxx/test/std/containers/unord/unord.multimap/unord.multimap.modifiers/insert_range.pass.cpp
index fcde119f487030..7219225ff16d95 100644
--- a/libcxx/test/std/containers/unord/unord.multimap/unord.multimap.modifiers/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.multimap/unord.multimap.modifiers/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <unordered_map>
diff --git a/libcxx/test/std/containers/unord/unord.multiset/insert_range.pass.cpp b/libcxx/test/std/containers/unord/unord.multiset/insert_range.pass.cpp
index 73ac4cf071e1bb..119091c007cb03 100644
--- a/libcxx/test/std/containers/unord/unord.multiset/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.multiset/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <set>
diff --git a/libcxx/test/std/containers/unord/unord.set/insert_range.pass.cpp b/libcxx/test/std/containers/unord/unord.set/insert_range.pass.cpp
index c6306a28b7adb5..d9503808c7f2cb 100644
--- a/libcxx/test/std/containers/unord/unord.set/insert_range.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.set/insert_range.pass.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// Some fields in the test case variables are deliberately not explicitly initialized, this silences a warning on GCC.
-// ADDITIONAL_COMPILE_FLAGS: -Wno-missing-field-initializers
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-missing-field-initializers
// <set>
diff --git a/libcxx/test/std/containers/views/mdspan/layout_stride/deduction.pass.cpp b/libcxx/test/std/containers/views/mdspan/layout_stride/deduction.pass.cpp
index 0e0a079b598bc0..5384f37fd40c78 100644
--- a/libcxx/test/std/containers/views/mdspan/layout_stride/deduction.pass.cpp
+++ b/libcxx/test/std/containers/views/mdspan/layout_stride/deduction.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
-// ADDITIONAL_COMPILE_FLAGS: -Wno-ctad-maybe-unsupported
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-ctad-maybe-unsupported
// <mdspan>
diff --git a/libcxx/test/std/containers/views/mdspan/mdspan/conversion.pass.cpp b/libcxx/test/std/containers/views/mdspan/mdspan/conversion.pass.cpp
index abb647e960c34e..99d786d1d33f5b 100644
--- a/libcxx/test/std/containers/views/mdspan/mdspan/conversion.pass.cpp
+++ b/libcxx/test/std/containers/views/mdspan/mdspan/conversion.pass.cpp
@@ -7,6 +7,9 @@
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
+// MSVC warning C4244: 'initializing': conversion from '_Ty' to '_Ty', possible loss of data
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4244
+
// <mdspan>
// template<class OtherElementType, class OtherExtents,
diff --git a/libcxx/test/std/containers/views/views.span/span.sub/subspan.verify.cpp b/libcxx/test/std/containers/views/views.span/span.sub/subspan.verify.cpp
index d6bc21197098a4..eb881707b1e648 100644
--- a/libcxx/test/std/containers/views/views.span/span.sub/subspan.verify.cpp
+++ b/libcxx/test/std/containers/views/views.span/span.sub/subspan.verify.cpp
@@ -9,7 +9,7 @@
// This test also generates spurious warnings when instantiating std::span
// with a very large extent (like size_t(-2)) -- silence those.
-// ADDITIONAL_COMPILE_FLAGS: -Xclang -verify-ignore-unexpected=warning
+// ADDITIONAL_COMPILE_FLAGS(verify-support): -Xclang -verify-ignore-unexpected=warning
// <span>
diff --git a/libcxx/test/std/depr/depr.c.headers/setjmp_h.compile.pass.cpp b/libcxx/test/std/depr/depr.c.headers/setjmp_h.compile.pass.cpp
index eaaeecbeb70ec8..feeefc1194e85a 100644
--- a/libcxx/test/std/depr/depr.c.headers/setjmp_h.compile.pass.cpp
+++ b/libcxx/test/std/depr/depr.c.headers/setjmp_h.compile.pass.cpp
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+// MSVC warning C4611: interaction between '_setjmp' and C++ object destruction is non-portable
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4611
+
// test <setjmp.h>
//
// Even though <setjmp.h> is not provided by libc++, we still test that
diff --git a/libcxx/test/std/depr/depr.numeric.limits.has.denorm/deprecated.verify.cpp b/libcxx/test/std/depr/depr.numeric.limits.has.denorm/deprecated.verify.cpp
index 98d49de80a58cf..9aa0d0b21d1e0a 100644
--- a/libcxx/test/std/depr/depr.numeric.limits.has.denorm/deprecated.verify.cpp
+++ b/libcxx/test/std/depr/depr.numeric.limits.has.denorm/deprecated.verify.cpp
@@ -8,7 +8,7 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
-// ADDITIONAL_COMPILE_FLAGS: -Wno-unused-value
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-unused-value
#include <limits>
diff --git a/libcxx/test/std/input.output/file.streams/fstreams/ifstream.members/buffered_reads.pass.cpp b/libcxx/test/std/input.output/file.streams/fstreams/ifstream.members/buffered_reads.pass.cpp
index d57b7c20a2da27..e6a6b650800b6b 100644
--- a/libcxx/test/std/input.output/file.streams/fstreams/ifstream.members/buffered_reads.pass.cpp
+++ b/libcxx/test/std/input.output/file.streams/fstreams/ifstream.members/buffered_reads.pass.cpp
@@ -7,6 +7,9 @@
//===----------------------------------------------------------------------===//
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT
+// MSVC warning C4242: '+=': conversion from 'const _Ty' to 'size_t', possible loss of data
+// MSVC warning C4244: 'argument': conversion from 'std::streamsize' to 'size_t', possible loss of data
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4242 /wd4244
// UNSUPPORTED: c++03
// <fstream>
diff --git a/libcxx/test/std/input.output/file.streams/fstreams/ofstream.members/buffered_writes.pass.cpp b/libcxx/test/std/input.output/file.streams/fstreams/ofstream.members/buffered_writes.pass.cpp
index e7820739505106..697ea7233de494 100644
--- a/libcxx/test/std/input.output/file.streams/fstreams/ofstream.members/buffered_writes.pass.cpp
+++ b/libcxx/test/std/input.output/file.streams/fstreams/ofstream.members/buffered_writes.pass.cpp
@@ -7,6 +7,9 @@
//===----------------------------------------------------------------------===//
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT
+// MSVC warning C4242: '+=': conversion from 'const _Ty' to 'size_t', possible loss of data
+// MSVC warning C4244: 'argument': conversion from 'std::streamsize' to 'size_t', possible loss of data
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4242 /wd4244
// UNSUPPORTED: c++03
// <fstream>
diff --git a/libcxx/test/std/language.support/support.runtime/csetjmp.pass.cpp b/libcxx/test/std/language.support/support.runtime/csetjmp.pass.cpp
index d6d32c371b9e5c..c95ebcf8c4b9de 100644
--- a/libcxx/test/std/language.support/support.runtime/csetjmp.pass.cpp
+++ b/libcxx/test/std/language.support/support.runtime/csetjmp.pass.cpp
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+// MSVC warning C4611: interaction between '_setjmp' and C++ object destruction is non-portable
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4611
+
// test <csetjmp>
#include <csetjmp>
diff --git a/libcxx/test/std/ranges/range.adaptors/range.lazy.split/constraints.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.lazy.split/constraints.compile.pass.cpp
index a942f439040929..2a772ccb83f811 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.lazy.split/constraints.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.lazy.split/constraints.compile.pass.cpp
@@ -8,6 +8,9 @@
// UNSUPPORTED: c++03, c++11, c++14, c++17
+// This is a compile-only test, so "inline function is not defined" warnings are irrelevant.
+// ADDITIONAL_COMPILE_FLAGS(any-clang-or-gcc): -Wno-undefined-inline
+
// template<input_range V, forward_range Pattern>
// requires view<V> && view<Pattern> &&
// indirectly_comparable<iterator_t<V>, iterator_t<Pattern>, ranges::equal_to> &&
diff --git a/libcxx/test/std/ranges/range.utility/range.utility.conv/to.pass.cpp b/libcxx/test/std/ranges/range.utility/range.utility.conv/to.pass.cpp
index 03270f25fd92b2..719e6e818b68e0 100644
--- a/libcxx/test/std/ranges/range.utility/range.utility.conv/to.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.utility.conv/to.pass.cpp
@@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
+// MSVC warning C4244: 'argument': conversion from '_Ty' to 'int', possible loss of data
+// ADDITIONAL_COMPILE_FLAGS(msvc-cl-exe): /wd4244
+
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
// template<class C, input_range R, class... Args> requires (!view<C>)
diff --git a/libcxx/test/std/strings/basic.string/string.cons/from_range_deduction.pass.cpp b/libcxx/test/std/strings/basic.string/string.cons/from_rang...
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IMHO, |
philnik777
reviewed
Dec 10, 2023
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I think I would name the features gcc-style-warnings and cl-style-warnings to make it clear what the intended use here is. I don't think we want anybody to start using these flags for anything else.
libcxx/test/std/atomics/atomics.types.generic/trivially_copyable.verify.cpp
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This reverts commit e373859.
…cl-style-warnings`. I've left `_isAnyClangOrGCC` unchanged, since that's what it's physically checking for.
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I've reverted the In the Python script, I've left |
h-vetinari
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Dec 10, 2023
ldionne
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This makes sense to me and it seems like a reasonable support burden for us. I have a comment, but this looks pretty good to me.
IMHO,
TEST_CLANG_DIAGNOSTIC_IGNORED/TEST_GCC_DIAGNOSTIC_IGNORED/TEST_MSVC_DIAGNOSTIC_IGNORED(from test_macros.h) should be the preferred way to disable warnings.
@cpplearner This is an interesting point. We could also decide to go all out and use the macros instead. TBH I am mostly neutral on this, but I'd be curious to hear what motivates your preference.
…in iterator.operations/advance.pass.cpp.
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I think I can prepare an alternative PR to use the macros everywhere. It'll take a bit of time, but I've already done the hard work here of figuring out which files need to suppress which MSVC warnings. |
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I've created #75133 and would prefer to merge that PR, since I was able to locally suppress some warnings and remove some weirdness from |
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Closing this PR since I want to proceed with the macro approach. |
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Found while running libc++'s tests with MSVC's STL.
The
ADDITIONAL_COMPILE_FLAGSmachinery is very useful, but also very problematic for MSVC, as it speaks Martian and doesn't understand most of Clang's compiler options. (-Dmeowis mutually intelligible and that's about it.) We've been dealing with this by simply marking anything that usesADDITIONAL_COMPILE_FLAGSasFAILorSKIPPED, but that creates significant gaps in test coverage.Fortunately,
ADDITIONAL_COMPILE_FLAGSalso supports "features", which can be slightly enhanced to send Clang-compatible and MSVC-compatible options to the right compilers.gcc-style-warnings.cl.exe. Then this feature should be used when a test wants to compile with-Wno-meow. This is the only "ongoing maintenance" request here, which should be minimal and easy to fix if any occurrences are forgotten underlibcxx/test/std.libcxx/utils/libcxx/test/features.py, I've implemented this by adding_isAnyClangOrGCC. I've also slightly refactored the logic (no functional changes) by adding_isAnyClangand_isAnyGCC, along the lines of @h-vetinari's suggestion.(gcc-style-warnings)to an inactiveADDITIONAL_COMPILE_FLAGSinlibcxx/test/std/iterators/iterator.primitives/iterator.operations/advance.pass.cpp, so it won't be forgotten.ADDITIONAL_COMPILE_FLAGS(gcc-style-warnings): -Wno-undefined-inlinetorange.lazy.split/constraints.compile.pass.cpp.ADDITIONAL_COMPILE_FLAGS(cl-style-warnings).cl.exeonly, so it's defined as the antonym of_isAnyClangOrGCC.msvcfeature is completely different - it indicates the presence of the_MSC_VERcompiler macro, i.e. any compiler pretending to be MSVC.llvm-project/libcxx/utils/libcxx/test/features.py
Line 19 in b85f1f9
llvm-project/libcxx/utils/libcxx/test/features.py
Line 117 in b85f1f9
cl-style-warningsmakes this distinction clear - it indicates the actualcl.execompiler driver./wdNNNNisn't self-explanatory, I'm commenting every occurrence with what the warning message is.static_casts #74962, [libc++][test] Fix more MSVC and Clang warnings #74965, and previous PRs.-Wno-deprecated-volatile).volatilein cast is ignored" is emitted forT();whenTisvolatile atomic<Whatever>, which is innocuous._setjmp' and C++ object destruction is non-portable" is emitted insetjmptests. I didn't see any concerning usage.X::cv_': destructor is not implicitly called" was emitted in a test that explicitly destroysx.cv_so it's fine.ADDITIONAL_COMPILE_FLAGS(cl-style-warnings)ought to be added accordingly. In fact, I'd prefer it if you didn't, allowing us to review such warnings as they appear. (Of course, if a test is copy-paste-modified, it would be reasonable to preserve any warning options that are unaffected by the modifications, that would never be a problem for us.)ADDITIONAL_COMPILE_FLAGS(cl-style-warnings)to silence a blizzard of x86 truncation warnings.