From: | Greg Smith <greg(at)2ndquadrant(dot)com> |
---|---|
To: | Chris Browne <cbbrowne(at)acm(dot)org> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Has anyone used CLANG yet? |
Date: | 2009-12-09 21:59:01 |
Message-ID: | 4B201DA5.7020408@2ndquadrant.com |
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Lists: | pgsql-hackers |
Chris Browne wrote:
> I suspect there's something about PASCAL that's a problem, as clang is
> nominally supposed to be a C compiler ;-).
>
"Pascal" refers to a way of different way of pushing things onto the
stack when calling things; there's "Pascal order" and "c order" when you
call a function, each approach has its good and bad sides. There's work
in progress to support different calling conventions including Pascal
order for LLVM at
http://nondot.org/sabre/LLVMNotes/CustomCallingConventions.txt . At
this point, supporting different call conventions is supported in LLVM
1.5: http://llvm.org/releases/1.5/docs/LangRef.html#callingconv but it
doesn't look like the syntax to support the Pascal one has made it in
there yet. Probably requires a fairly small patch to LLVM now that the
main infrastructure is available.
Don't know if it's feasible to rip all the Pascal convention code out
PostgreSQL, that's the other approach.
--
Greg Smith 2ndQuadrant Baltimore, MD
PostgreSQL Training, Services and Support
greg(at)2ndQuadrant(dot)com www.2ndQuadrant.com
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