[pull] swiftwasm from master #1001
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* a new [immutable] attribute on ref_element_addr and ref_tail_addr * new instructions: begin_cow_mutation and end_cow_mutation These new instructions are intended to be used for the stdlib's COW containers, e.g. Array. They allow more aggressive optimizations, especially for Array.
* Builtin.COWBufferForReading -> ref_element_addr [immutable] / ref_tail_addr [immutable] * Builtin.beginCOWmutation -> begin_cow_mutation * Builtin.endCOWmutation -> end_cow_mutation
MaxDesiatov
approved these changes
May 14, 2020
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