874217f99b
This also ignores and deprecates the `-fdouble-square-bracket-attributes` command line flag, which seems to not be used anywhere. At least a code search exclusively found mentions of it in documentation: https://sourcegraph.com/search?q=context:global+-fdouble-square-bracket-attributes+-file:clang/*+-file:test/Sema/*+-file:test/Parser/*+-file:test/AST/*+-file:test/Preprocessor/*+-file:test/Misc/*+archived:yes&patternType=standard&sm=0&groupBy=repo RFC: https://discourse.llvm.org/t/rfc-enable-c-11-c2x-attributes-in-all-standard-modes-as-an-extension-and-remove-fdouble-square-bracket-attributes This enables `[[]]` attributes in all C and C++ language modes without warning by default. `-Wc++-extensions` does warn. GCC has enabled this extension in all C modes since GCC 10. Reviewed By: aaron.ballman, MaskRay Spies: #clang-vendors, beanz, JDevlieghere, Michael137, MaskRay, sstefan1, jplehr, cfe-commits, lldb-commits, dmgreen, jdoerfert, wenlei, wlei Differential Revision: https://reviews.llvm.org/D151683
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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#if !__has_extension(gnu_asm)
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#error Extension 'gnu_asm' should be available by default
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#endif
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void f1(void) {
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// PR7673: Some versions of GCC support an empty clobbers section.
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asm ("ret" : : :);
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}
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void f2(void) {
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asm("foo" : "=r" (a)); // expected-error {{use of undeclared identifier 'a'}}
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asm("foo" : : "r" (b)); // expected-error {{use of undeclared identifier 'b'}}
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[[]] asm("");
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[[gnu::deprecated]] asm(""); // expected-warning {{'deprecated' attribute ignored}}
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}
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void a(void) __asm__(""); // expected-error {{cannot use an empty string literal in 'asm'}}
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void a(void) {
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__asm__(""); // ok
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}
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// rdar://5952468
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__asm ; // expected-error {{expected '(' after 'asm'}}
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// <rdar://problem/10465079> - Don't crash on wide string literals in 'asm'.
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int foo asm (L"bar"); // expected-error {{cannot use wide string literal in 'asm'}}
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asm() // expected-error {{expected string literal in 'asm'}}
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// expected-error@-1 {{expected ';' after top-level asm block}}
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asm(; // expected-error {{expected string literal in 'asm'}}
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asm("") // expected-error {{expected ';' after top-level asm block}}
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// Unterminated asm strings at the end of the file were causing us to crash, so
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// this needs to be last. rdar://15624081
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// expected-warning@+3 {{missing terminating '"' character}}
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// expected-error@+2 {{expected string literal in 'asm'}}
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// expected-error@+1 {{expected ';' after top-level asm block}}
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asm("
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