Feedback-ID: ia2694551:Fastmail
Date: Tue, 7 Nov 2023 16:46:53 +0100
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>
Subject: Re: Compiler warning on Debian 12, PostgreSQL 16 Beta3
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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/