[6.2] MandatoryPerformanceOptimizations: only set the [perf_constraint] flag for callees of performance constraint functions
#82141
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…lag for callees of performance constraint functions It used to also set it for functions which are referenced from a global with a const/section attribute - even if not performance attribute was present in the whole module. This is unnecessary and can lead to worse code generation. rdar://152665294
xedin
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Jun 10, 2025
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tbkka
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Jun 10, 2025
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Node::Kind::OutlinedInitializeWithTakeNoValueWitness#82066. Even without this original fix, no such SIL should be generated (which can cause the IRGen crash) in the first place. The[perf_constraint]flag should not be set to any function which is not - or not called - by a performance-constraint function. This fixes a regression which was introduced by [6.2] MandatoryPerformanceOptimizations: make sure to handle de-serialized vtable methods #81974.@_sectionor@constattribute..[perf_constraint]flag for callees of performance constraint functions #82068