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<div>Hi David,</div>
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<div>Indeed, I built stock 3.5.1 LLVM+Clang and the problem went away. Diffing the resulting IR I found that the clang I was using (stock Xcode 'Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)') was not including !llvm.module.flags with references
to the DWARF and debug info versions. When I manually added this to the output from the Xcode Clang the problem went away; so I think it's safe to assume that our compiler has the same problem as we are also not including the llvm.module.flags. Thanks for
pointing me in the right direction!</div>
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<div><font class="Apple-style-span" color="#000000"><font class="Apple-style-span" face="Calibri">Peter Zion</font></font></div>
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<span style="font-weight:bold">From: </span>David Blaikie <<a href="mailto:dblaikie@gmail.com">dblaikie@gmail.com</a>><br>
<span style="font-weight:bold">Date: </span>Monday, February 2, 2015 at 6:53 PM<br>
<span style="font-weight:bold">To: </span>Peter Zion <<a href="mailto:peter.zion@fabricengine.com">peter.zion@fabricengine.com</a>>, LLVM Developers Mailing List <<a href="mailto:llvmdev@cs.uiuc.edu">llvmdev@cs.uiuc.edu</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [LLVMdev] Debug info not preserved by llvm-as (LLParser)?<br>
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<div dir="ltr">(oops, dropped the ML by accident)</div>
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<div class="gmail_quote">On Mon, Feb 2, 2015 at 3:53 PM, David Blaikie <span dir="ltr">
<<a href="mailto:dblaikie@gmail.com" target="_blank">dblaikie@gmail.com</a>></span> wrote:<br>
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<div class="gmail_quote"><span class="">On Mon, Feb 2, 2015 at 3:46 PM, Peter Zion
<span dir="ltr"><<a href="mailto:Peter.Zion@fabricengine.com" target="_blank">Peter.Zion@fabricengine.com</a>></span> wrote:<br>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">Hi there,</div>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">If I run:</div>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"> clang -S -emit-llvm -o - -g test.c</div>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">for a trivial test.c I see debug info in the IR as expected. However, if I run:</div>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"> clang -S -emit-llvm -o - -g test.c | llvm-as | llvm-dis</div>
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Are you using matching (built from the exact same revision) versions of clang, llvm-as, and llvm-dis?<br>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">the debug info is stripped. Is this intentional? If so, is there a way to force the debug metadata to make its way through the pipeline? This is on either LLVM 3.5 or LLVM 3.4.</div>
<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"><br>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px">This has come up for me because I was hoping to provide IR in place of source code in a certain part of our application and while it works any unit tests that rely on debug info are
broken. Tracking down the issue let me to this.</div>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"><br>
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<div style="color:rgb(0,0,0);font-family:Calibri,sans-serif;font-size:14px"><span style="font-family:Calibri">Peter Zion</span></div>
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