Fix incomplete assignment operators used in copy constructors; fix algorithm for detecting aliased mem writes in global DU chains.

Fix RTLs for SCAS and CMPS; eliminate spurious ERROR messages for LEA RTLs; reduce log messages to speed up; don't call profiler analysis methods if there are no profiler annotations.

Do not treat calls to address 0 as calls, because these are only found in unreachable basic blocks that gcc failed to remove.

Fix infinite loops and crashes related to unreachable blocks and SSE/MMX instructions and registers.

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Make add-with-carry and sub-with-borrow usually like add and sub, but with the possibility of changing the register type from POINTER to NUMERIC.