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[NFC] Remove LLVM_ALIGNAS

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Summary: The minimum compilers support all have alignas, and we don't use LLVM_ALIGNAS anywhere anymore. This also removes an MSVC diagnostic which, according to the comment above, isn't relevant anymore.

Reviewers: rnk

Subscribers: mgorny, jkorous, dexonsmith, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D65458

llvm-svn: 367383
This commit is contained in:
JF Bastien 2019-07-31 03:22:08 +00:00
parent 87e20d6404
commit c63c7fb213
4 changed files with 7 additions and 23 deletions
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8
cmake/modules/HandleLLVMOptions.cmake
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@ -530,14 +530,6 @@ if (MSVC)
# is fixed.
-wd4709 # Suppress comma operator within array index expression
# Ideally, we'd like this warning to be enabled, but MSVC 2013 doesn't
# support the 'aligned' attribute in the way that clang sources requires (for
# any code that uses the LLVM_ALIGNAS macro), so this is must be disabled to
# avoid unwanted alignment warnings.
# When we switch to requiring a version of MSVC that supports the 'alignas'
# specifier (MSVC 2015?) this warning can be re-enabled.
-wd4324 # Suppress 'structure was padded due to __declspec(align())'
# Promoted warnings.
-w14062 # Promote 'enumerator in switch of enum is not handled' to level 1 warning.

2
docs/doxygen.cfg.in
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@ -1926,7 +1926,7 @@ INCLUDE_FILE_PATTERNS =
# recursively expanded use the := operator instead of the = operator.
# This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
PREDEFINED = LLVM_ALIGNAS(x)=
PREDEFINED =
# If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
# tag can be used to specify a list of macro names that should be expanded. The

12
include/llvm/Support/Compiler.h
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@ -338,14 +338,6 @@
# define LLVM_ASSUME_ALIGNED(p, a) (p)
#endif
/// \macro LLVM_ALIGNAS
/// Used to specify a minimum alignment for a structure or variable.
#if __GNUC__ && !__has_feature(cxx_alignas) && !LLVM_GNUC_PREREQ(4, 8, 1)
# define LLVM_ALIGNAS(x) __attribute__((aligned(x)))
#else
# define LLVM_ALIGNAS(x) alignas(x)
#endif
/// \macro LLVM_PACKED
/// Used to specify a packed structure.
/// LLVM_PACKED(
@ -376,8 +368,8 @@
/// \macro LLVM_PTR_SIZE
/// A constant integer equivalent to the value of sizeof(void*).
/// Generally used in combination with LLVM_ALIGNAS or when doing computation in
/// the preprocessor.
/// Generally used in combination with alignas or when doing computation in the
/// preprocessor.
#ifdef __SIZEOF_POINTER__
# define LLVM_PTR_SIZE __SIZEOF_POINTER__
#elif defined(_WIN64)

8
unittests/Support/AlignOfTest.cpp
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@ -38,10 +38,10 @@ namespace {
#endif
// Define some fixed alignment types to use in these tests.
struct LLVM_ALIGNAS(1) A1 {};
struct LLVM_ALIGNAS(2) A2 {};
struct LLVM_ALIGNAS(4) A4 {};
struct LLVM_ALIGNAS(8) A8 {};
struct alignas(1) A1 {};
struct alignas(2) A2 {};
struct alignas(4) A4 {};
struct alignas(8) A8 {};
struct S1 {};
struct S2 { char a; };