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In EEOP_BOOL_AND_STEP* and EEOP_BOOL_OR_STEP*, we emitted pointlesss store instructions to store to resnull/resvalue values that were just loaded from the same fields in the previous instructions. They will surely get optimized away by LLVM if any optimizations are enabled, but it's better to not emit them in the first place. In EEOP_BOOL_NOT_STEP, similar story with resnull. In EEOP_NULLIF, when it returns NULL, there was also a redundant store to resvalue just after storing a 0 to it. The value of resvalue doesn't matter when resnull is set, so in fact even storing the 0 is unnecessary, but I kept that because we tend to do that for general tidiness. Author: Xing Guo <higuoxing@gmail.com> Reviewed-by: Andreas Karlsson <andreas@proxel.se> Discussion: https://www.postgresql.org/message-id/CACpMh%2BC%3Dg13WdvzLRSponsVWGgxwDSMzQWM4Gz0heOyaA0-N6g@mail.gmail.com
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.