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Billy Laws
151fc5e97f
With the prior approach, backwards jumps into existing blocks would explore the overlapping part rather than splitting the block, generating needless code and wasting time decoding. Similarly, the current block wouldn't be split when it is extended to overlap with a pending jump target. Solve this by tracking blocks in a sorted vector and splitting existing blocks on jumps when appropriate, in order to avoid any possibility of overlapping blocks, which would break the lookup, misaligned and zero instruction blocks are disallowed.