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Re: Compiler warning on Debian 12, PostgreSQL 16 Beta3

Alvaro Herrera <alvherre@alvh.no-ip.org>

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From: Alvaro Herrera <alvherre@alvh.no-ip.org>
To: "Daniel Westermann (DWE)" <daniel.westermann@dbi-services.com>
Cc: Thomas Munro <thomas.munro@gmail.com>, Andres Freund <andres@anarazel.de>, "pgsql-hackers@lists.postgresql.org" <pgsql-hackers@lists.postgresql.org>
Date: 2023-11-07T15:46:53Z
Lists: pgsql-hackers 
On 2023-Aug-25, Daniel Westermann (DWE) wrote:

> I've just noticed this warning when building on Debian 12:
> 
> In file included from /usr/lib/llvm-14/include/llvm/Analysis/ModuleSummaryAnalysis.h:17,
>                  from llvmjit_inline.cpp:51:
> /usr/lib/llvm-14/include/llvm/IR/ModuleSummaryIndex.h: In constructor ‘llvm::ModuleSummaryIndex::ModuleSummaryIndex(bool, bool)’:
> /usr/lib/llvm-14/include/llvm/IR/ModuleSummaryIndex.h:1175:73: warning: member ‘llvm::ModuleSummaryIndex::Alloc’ is used uninitialized [-Wuninitialized]
>  1175 |       : HaveGVs(HaveGVs), EnableSplitLTOUnit(EnableSplitLTOUnit), Saver(Alloc),
>       |                    

Yeah, I get this one too.  I thought commit 37d5babb5cfa ("jit: Support
opaque pointers in LLVM 16.") was going to silence it, but I was quite
mistaken.  I gave that code a quick look and could not understand what
it was complaining about.  Is it a bug in the LLVM headers?

Adding Andres and Thomas to CC, because they're the ones touching the
LLVM / JIT code.

Any clues?

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. jit: Support opaque pointers in LLVM 16.