[5.1][Runtime] Use a #define for the value of swift_isaMask. #24676
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This allows _swift_getClassOfAllocated to use a constant instead of loading from a global, and allows swift_isaMask to be computed without a static initializer. Debug builds verify that the #define matches the value from libobjc. rdar://problem/22375602 rdar://problem/46385113
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@swift-ci please test |
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Build failed |
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@swift-ci please test linux platform |
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Cherry-pick #24616 for 5.1.
This allows _swift_getClassOfAllocated to use a constant instead of loading from a global, and allows swift_isaMask to be computed without a static initializer. Debug builds verify that the #define matches the value from libobjc.
rdar://problem/22375602 rdar://problem/46385113