pgsql: Always inline SeqNext and SeqRecheck

Always inline SeqNext and SeqRecheck

The intention of the work done in fb9f95502 was that these functions are
inlined.  I noticed my compiler isn't doing this on -O2 (gcc version
15.2.0).  Also, clang version 20.1.8 isn't inlining either.  Fix by
marking both of these functions as pg_attribute_always_inline to avoid
leaving this up to the compiler's heuristics.

A quick test with a Seq Scan on a table with a single int column running
a query that filters all 1 million rows in the WHERE clause yields a
3.9% speedup on my Zen4 machine.

Author: David Rowley <dgrowleyml@gmail.com>
Discussion: https://postgr.es/m/CAApHDvrL7Q41B=gv+3wc8+AJGKZugGegUbBo8FPQ+3+NGTPb+w@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/83a53572a6fc9f83276d24d8c2747b3d5ce49440

Modified Files
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src/backend/executor/nodeSeqscan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)