Why don't more architectures have conditional call instructions?
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I can think of two places it'd be useful for code size in patterns Swift emits: - for tracing runtime errors, it'd be nice to be able to e.g. call-if-overflow a common trap instruction, instead of jumping to a different trap for every overflow trap - for one-time initializations
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but still is this really justifies adding a new indtruction for such patterns?
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