79f87be688
1. The generated file contained a lot of duplicate switch cases, e.g.:
```
switch (Syntax) {
case AttributeCommonInfo::Syntax::AS_GNU:
return llvm::StringSwitch<int>(Name)
...
.Case("error", 1)
.Case("warning", 1)
.Case("error", 1)
.Case("warning", 1)
```
2. Some attributes were listed in wrong places, e.g.:
```
case AttributeCommonInfo::Syntax::AS_CXX11: {
if (ScopeName == "") {
return llvm::StringSwitch<int>(Name)
...
.Case("warn_unused_result", LangOpts.CPlusPlus11 ? 201907 : 0)
```
`warn_unused_result` is a non-standard attribute and should not be
available as [[warn_unused_result]].
3. Some attributes had the wrong version, e.g.:
```
case AttributeCommonInfo::Syntax::AS_CXX11: {
} else if (ScopeName == "gnu") {
return llvm::StringSwitch<int>(Name)
...
.Case("fallthrough", LangOpts.CPlusPlus11 ? 201603 : 0)
```
[[gnu::fallthrough]] is a non-standard spelling and should not have the
standard version. Instead, __has_cpp_attribute should return 1 for it.
There is another issue with attributes that share spellings, e.g.:
```
.Case("interrupt", true && (T.getArch() == llvm::Triple::arm || ...) ? 1 : 0)
.Case("interrupt", true && (T.getArch() == llvm::Triple::avr) ? 1 : 0)
...
.Case("interrupt", true && (T.getArch() == llvm::Triple::riscv32 || ...) ? 1 : 0)
```
As can be seen, __has_attribute(interrupt) would only return true for
ARM targets. This patch does not address this issue.
Differential Revision: https://reviews.llvm.org/D159393
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
// RUN: %clang_cc1 -triple arm-unknown-linux -verify -E %s -o - | FileCheck %s
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// CHECK: always_inline
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#if __has_attribute(always_inline)
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int always_inline();
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#endif
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// CHECK: __always_inline__
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#if __has_attribute(__always_inline__)
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int __always_inline__();
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#endif
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// CHECK: warn_unused_result
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#if __has_attribute(warn_unused_result)
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int warn_unused_result();
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#endif
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// CHECK: no_dummy_attribute
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#if !__has_attribute(dummy_attribute)
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int no_dummy_attribute();
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#endif
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// CHECK: has_has_attribute
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#ifdef __has_attribute
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int has_has_attribute();
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#endif
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// CHECK: has_something_we_dont_have
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#if !__has_attribute(something_we_dont_have)
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int has_something_we_dont_have();
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#endif
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#if __has_attribute(__const)
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int fn3() __attribute__ ((__const));
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#endif
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#if __has_attribute(const)
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static int constFunction() __attribute__((const));
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#endif
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// CHECK: has_no_volatile_attribute
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#if !__has_attribute(volatile)
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int has_no_volatile_attribute();
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#endif
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// CHECK: has_arm_interrupt
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#if __has_attribute(interrupt)
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int has_arm_interrupt();
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#endif
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// CHECK: does_not_have_dllexport
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#if !__has_attribute(dllexport)
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int does_not_have_dllexport();
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#endif
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// CHECK: does_not_have_uuid
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#if !__has_attribute(uuid)
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int does_not_have_uuid
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#endif
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#if __has_cpp_attribute(selectany) // expected-error {{function-like macro '__has_cpp_attribute' is not defined}}
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#endif
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// Test that macro expansion of the builtin argument works.
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#define F fallthrough
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#if __has_attribute(F)
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int has_fallthrough;
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#endif
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// CHECK: int has_fallthrough;
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