X86: force enable the mandatory tailcall on Win64 #6282
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Enable the guaranteed tailcall on Windows x86_64 when we encounter a Swift function call. This function will not conform to the Windows prologue requirements which will implicitly break the unwinder and the debugger, but is required to enable the proper Concurrency behaviour for non-trivial programs. This requires associated changes in the Swift repository to update the test expectations.
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CC: @TNorthover |
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@swift-ci please test |
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Enable the guaranteed tailcall on Windows x86_64 when we encounter a Swift function call. This function will not conform to the Windows prologue requirements which will implicitly break the unwinder and the debugger, but is required to enable the proper Concurrency behaviour for non-trivial programs. This requires associated changes in the Swift repository to update the test expectations.