[llvm-dev] bugpoint --tool-args and --safe-tool-args

Sean Silva via llvm-dev
Wed, 01 Aug 2018 01:19:35 -0000

Have you read
http://blog.llvm.org/2015/11/reduce-your-testcases-with-bugpoint-and.html?m=1
?

That's how I always use bugpoint and have done things like this. I always
seem to have to brush up my bash skills every time I use it.

On Tue, Jul 31, 2018, 1:47 PM David A. Greene via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Ugh.  Scripts won't work either, at least not by default.  The problem
> is that I need non-default options for both the safe and unsafe
> compiler.
>
> I hacked in an -unsafe-path option to let me point to a script for the
> "bad" compiler.  We'll see if that works.  If it does, would
it be a
> useful addition?
>
>                            -David
>
> Matthias Braun <mbraun at apple.com> writes:
>
> > This is what works for me, when I want to reduce an llc failure
> > triggering a failure with a "foo bar baz" in the assert
message (the
> > grep for the error message avoids reducing to an unrelated failure):
> >
> > $ cat run_llc.sh
> > #!/bin/sh
> > if ! $HOME/dev/llvm/build/bin/llc "$@" 2>&1 | grep
"foo bar baz"; then
> > exit 0
> > else
> > exit $?
> > fi
> >
> > $ PATH=$HOME/path/to/my/llvm/build/bin:$PATH bugpoint -compile-custom
-
> > compile-command ./run_llc.sh test.ll
> >
> > - Matthias
> >
> >     On Jul 31, 2018, at 11:03 AM, Friedman, Eli via llvm-dev
> >     <llvm-dev at lists.llvm.org> wrote:
> >
> >
> >     On 7/31/2018 10:10 AM, David Greene via llvm-dev wrote:
> >
> >     I have a failing test and bugpoint would be the perfect tool to
> >         help
> >         narrow it down.
> >
> >         llc is the failing tool. It fails with one set of options and
> >         passes
> >         with another. I was hoping to use bugpoint like this:
> >
> >         bugpoint -safe-llc -run-llc <testcase> -tool-args
<failing
> >         args> -safe-tool-args <passing args>
> >
> >         Unfortunately, this doesn't seem to be possible. According
to
> >         the
> >         documentation both -tool-args and -safe-tool-args consume all
> >         remaining
> >         arguments so bugpoint would never see -safe-tool-args above.
> >
> >         I tried it and indeed it looks like -safe-tool-args never
> >         makes it to
> >         llc.
> >
> >         For now I can build another llc which makes <failing
args>
> >         default and
> >         then just use -safe-tool-args above but it's a bit
painful.
> >
> >         Has anyone tried to use bugpoint like this before? Any tips?
> >
> >     I've occasionally used shell script wrappers when I
couldn't get
> >     bugpoint command-line parsing to work the way I wanted it to.
> >
> >     Looking at CommandLine.rst, PositionalEatsArgs is supposed to
> >     allow specifying something like the command you wrote, but I'm
not
> >     sure it ever worked correctly; nothing other than bugpoint uses
> >     it, as far as I can tell.
> >
> >     -Eli
> >
> >     --
> >     Employee of Qualcomm Innovation Center, Inc.
> >     Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> >     a Linux Foundation Collaborative Project
> >
> >     _______________________________________________
> >     LLVM Developers mailing list
> >     llvm-dev at lists.llvm.org
> >     http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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