llvm dev - Nov 2018 - Finding line numbers in source code associated with given bitcode instructions

Hello,

Is it possible to somehow similar to how DWARF functions with assembly find
out which line numbers in unoptimized code are associated with which
bitcode instructions for the purpose of debugging compiler passes? I am
curious about whether this is possible prior to writing some
instrumentation passes for the purpose of debugging them.

Thanks in advance,

Carter.
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It looks like using one of clang's `-Rpass` remark options would annotate
instructions with source locations, without actually producing any debug info
(type info etc).  If that doesn't work, `-gmlt` (aka `-gline-tables-only`)
should do the trick.
--paulr

From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Carter
Cheng via llvm-dev
Sent: Wednesday, November 28, 2018 9:09 AM
To: llvm-dev at lists.llvm.org
Subject: [llvm-dev] Finding line numbers in source code associated with given
bitcode instructions

Hello,

Is it possible to somehow similar to how DWARF functions with assembly find out
which line numbers in unoptimized code are associated with which bitcode
instructions for the purpose of debugging compiler passes? I am curious about
whether this is possible prior to writing some instrumentation passes for the
purpose of debugging them.

Thanks in advance,

Carter.
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Great, thanks for the info!

On Wed, Nov 28, 2018 at 11:12 PM <paul.robinson at sony.com> wrote:
> It looks like using one of clang's `-Rpass` remark options would
annotate
> instructions with source locations, without actually producing any debug
> info (type info etc).  If that doesn't work, `-gmlt` (aka
> `-gline-tables-only`) should do the trick.
>
> --paulr
>
>
>
> *From:* llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] *On Behalf Of
*Carter
> Cheng via llvm-dev
> *Sent:* Wednesday, November 28, 2018 9:09 AM
> *To:* llvm-dev at lists.llvm.org
> *Subject:* [llvm-dev] Finding line numbers in source code associated with
> given bitcode instructions
>
>
>
> Hello,
>
>
>
> Is it possible to somehow similar to how DWARF functions with assembly
> find out which line numbers in unoptimized code are associated with which
> bitcode instructions for the purpose of debugging compiler passes? I am
> curious about whether this is possible prior to writing some
> instrumentation passes for the purpose of debugging them.
>
>
>
> Thanks in advance,
>
>
>
> Carter.
>
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