[clang] Add __has_extension(swiftcc) support
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This patch adds `swiftcc` extension to check if the target supports Swift calling convention as well as we do for `swiftasynccc`. Also `swiftasynccc` is now considered to be a Clang extension rather than a language standard feature to reflect the nature of the attribute.
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@swift-ci Please test |
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Please test with following pull request: @swift-ci Please test macOS platform |
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Please test with following pull request: @swift-ci Please test Windows platform |
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🍒 Upstream PR: llvm#85347
This patch adds
swiftccextension to check if the target supports Swift calling convention as well as we do forswiftasynccc. Alsoswiftasyncccis now considered to be a Clang extension rather than a language standard feature to reflect the nature of the attribute.