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Hongbin Zheng via llvm-dev

2016-Aug-19 17:24 UTC

[llvm-dev] Stop bugpoint from removing operand of metadata.

Hi,

I am trying to use bugpoint to reduce testcase. And bugpoint try to reduce
the number of operands for metadata, and this generate corrupted metadata:

*** Attempting to remove named metadata: Checking for crash with only these
named metadata nodes: llvm.dbg.cu llvm.module.flags llvm.ident: <crash>
Checking for crash with only these named metadata nodes: llvm.module.flags
llvm.ident: <crash>
Checking for crash with only these named metadata nodes: llvm.ident:
Checking for crash with only these named metadata nodes: llvm.module.flags:
<crash>
Checking for crash with only 3 named metadata operands: <crash>
Checking for crash with only 2 named metadata operands: All DICompileUnits
must be listed in llvm.dbg.cu
LLVM ERROR: Broken module found, compilation aborted!


This crash bugpoint itself. Is there away to prevent bugpoint from doing
this rather than changing the source code of bugpoint?

I tried to run a "bugpoint --help-hidden" and get the following
options
related to metadata:
    -lowertypetests                                        - Lower type
metadata
  -disable-namedmd-remove                                  - Do not remove
global named metadata
  -enable-import-metadata                                  - Enable import
metadata like 'thinlto_src_module'
  -enable-noalias-to-md-conversion                         - Convert
noalias attributes to metadata during inlining.
  -lto-strip-invalid-debug-info                            - Strip invalid
debug info metadata during LTO instead of aborting.

And I don't think these help.

Any suggestion?

Thanks
Hongbin
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Mehdi Amini via llvm-dev

2016-Aug-19 17:32 UTC

head link

[llvm-dev] Stop bugpoint from removing operand of metadata.

Hi,

> On Aug 19, 2016, at 10:24 AM, Hongbin Zheng via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Hi,
> 
> I am trying to use bugpoint to reduce testcase. And bugpoint try to reduce
the number of operands for metadata, and this generate corrupted metadata:
> 
> *** Attempting to remove named metadata: Checking for crash with only these
named metadata nodes: llvm.dbg.cu <http://llvm.dbg.cu/> llvm.module.flags
llvm.ident: <crash>
> Checking for crash with only these named metadata nodes: llvm.module.flags
llvm.ident: <crash>
> Checking for crash with only these named metadata nodes: llvm.ident:
> Checking for crash with only these named metadata nodes: llvm.module.flags:
<crash>
> Checking for crash with only 3 named metadata operands: <crash>
> Checking for crash with only 2 named metadata operands: All DICompileUnits
must be listed in llvm.dbg.cu <http://llvm.dbg.cu/>
> LLVM ERROR: Broken module found, compilation aborted!
I had the same issue, and have some local patches to help with this.
Have you tried the   -disable-namedmd-remove option?

Also, at this point where bug point crashes, it should already have dumped a
module.

— 
Mehdi

> 
> 
> This crash bugpoint itself. Is there away to prevent bugpoint from doing
this rather than changing the source code of bugpoint?
> 
> I tried to run a "bugpoint --help-hidden" and get the following
options related to metadata:
>     -lowertypetests                                        - Lower type
metadata
>   -disable-namedmd-remove                                  - Do not remove
global named metadata
>   -enable-import-metadata                                  - Enable import
metadata like 'thinlto_src_module'
>   -enable-noalias-to-md-conversion                         - Convert
noalias attributes to metadata during inlining.
>   -lto-strip-invalid-debug-info                            - Strip invalid
debug info metadata during LTO instead of aborting.
> 
> And I don't think these help.
> 
> Any suggestion?
> 
> Thanks
> Hongbin
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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Hongbin Zheng via llvm-dev

2016-Aug-19 17:38 UTC

head link

[llvm-dev] Stop bugpoint from removing operand of metadata.

On Fri, Aug 19, 2016 at 10:32 AM, Mehdi Amini <mehdi.amini at apple.com>
wrote:
> Hi,
>
>
> On Aug 19, 2016, at 10:24 AM, Hongbin Zheng via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
> Hi,
>
> I am trying to use bugpoint to reduce testcase. And bugpoint try to reduce
> the number of operands for metadata, and this generate corrupted metadata:
>
> *** Attempting to remove named metadata: Checking for crash with only
> these named metadata nodes: llvm.dbg.cu llvm.module.flags llvm.ident:
> <crash>
> Checking for crash with only these named metadata nodes: llvm.module.flags
> llvm.ident: <crash>
> Checking for crash with only these named metadata nodes: llvm.ident:
> Checking for crash with only these named metadata nodes:
> llvm.module.flags: <crash>
> Checking for crash with only 3 named metadata operands: <crash>
> Checking for crash with only 2 named metadata operands: All DICompileUnits
> must be listed in llvm.dbg.cu
> LLVM ERROR: Broken module found, compilation aborted!
>
>
> I had the same issue, and have some local patches to help with this.
> Have you tried the   -disable-namedmd-remove option?
>Yep, that contains too much metadata :)

>
> Also, at this point where bug point crashes, it should already have dumped
> a module.
>Thanks for pointing this out. let me check

>
> —
> Mehdi
>
>
>
>
> This crash bugpoint itself. Is there away to prevent bugpoint from doing
> this rather than changing the source code of bugpoint?
>
> I tried to run a "bugpoint --help-hidden" and get the following
options
> related to metadata:
>     -lowertypetests                                        - Lower type
> metadata
>   -disable-namedmd-remove                                  - Do not remove
> global named metadata
>   -enable-import-metadata                                  - Enable import
> metadata like 'thinlto_src_module'
>   -enable-noalias-to-md-conversion                         - Convert
> noalias attributes to metadata during inlining.
>   -lto-strip-invalid-debug-info                            - Strip invalid
> debug info metadata during LTO instead of aborting.
>
> And I don't think these help.
>
> Any suggestion?
>
> Thanks
> Hongbin
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
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