[LLVMdev] generating !llvm.dbg.sp

[Bendersky, Eli]

I've opened PR 12050 to track the problem with llvm.dbg.gv

Eli


From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Bendersky, Eli
Sent: Tuesday, February 14, 2012 13:45
To: Devang Patel; Eric Christopher
Cc: llvmdev at cs.uiuc.edu
Subject: Re: [LLVMdev] generating !llvm.dbg.sp

Eric, Devang,

FYI exactly the same applies for llvm.dbg.gv - it's also still listed in the docs and in various places throughout the code, although no longer generated.

Eli


From: Devang Patel [mailto:dpatel at apple.com]<mailto:[mailto:dpatel at apple.com]>
Sent: Monday, February 13, 2012 19:26
To: Eric Christopher
Cc: Bendersky, Eli; llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu>
Subject: Re: [LLVMdev] generating !llvm.dbg.sp

Thanks Eric. I know some of the references are in the code used for backward compatibility.
-
Devang
On Feb 13, 2012, at 9:21 AM, Eric Christopher <echristo at apple.com<mailto:echristo at apple.com>> wrote:

Thanks. I'll get them. :)

-eric

On Feb 13, 2012, at 1:41 AM, Bendersky, Eli wrote:

Thanks. Note that there are still a few references to this MDNode scattered throughout the code-base, so if it's no longer being generated, there may be some bugs lurking there.

Eli


From: Devang Patel [mailto:dpatel at apple.com]<mailto:[mailto:dpatel at apple.com]>
Sent: Thursday, February 09, 2012 19:36
To: Bendersky, Eli
Cc: llvmdev at cs.uiuc.edu<mailto:llvmdev at cs.uiuc.edu>
Subject: Re: generating !llvm.dbg.sp


On Feb 9, 2012, at 7:17 AM, "Bendersky, Eli" <eli.bendersky at intel.com<mailto:eli.bendersky at intel.com>> wrote:


Hello,

According to the documentation here -http://llvm.org/docs/SourceLevelDebugging.html:

>>    All subprogram descriptors are collected by a named metadata!llvm.dbg.sp.

LLVM seems to have lost the ability to generate this metadata node in r126871, when DIFactory was removed.

Is this an intended change?

Yes, I'll update the doc.


We were relying in the existence of this node, and things broke once we switched from LLVM 2.8 to 3.0.
Is there an alternative location where all the subprogram debug descriptors (DW_TAG_subprogram) can be obtained?

You can use DebugInfoFinder from DebugInfo.h. It provides an iterator to walk over all subprograms.
-
Devang
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