llvm dev - Aug 2017 - can llvm-lit pass output of one RUN command as an argument to another RUN command

Is there a way to do this with llvm-lit, i.e., use the equivalent of
backticks?

foo takes a single argument, but doesn't read from stdin.

// RUN foo some_arg > %t; FileCheck %s < %t
// RUN foo `cat %t` | FileCheck --check-prefix=INVERSE

// CHECK: {{^[0-9]+$}}
// INVERSE: some_arg

thanks...
don
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Btw, this works on *nix type systems, but I'm not sure about Windows.


On Wed, Aug 2, 2017 at 4:06 PM, don hinton <hintonda at gmail.com> wrote:
> Is there a way to do this with llvm-lit, i.e., use the equivalent of
> backticks?
>
> foo takes a single argument, but doesn't read from stdin.
>
> // RUN foo some_arg > %t; FileCheck %s < %t
> // RUN foo `cat %t` | FileCheck --check-prefix=INVERSE
>
> // CHECK: {{^[0-9]+$}}
> // INVERSE: some_arg
>
> thanks...
> don
>
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lit run lines are written in posix shell. However as you suspect the situation
on windows is special, lit comes with its own shell parser/interpreter which
doesn't support the full range of posix shell features. Glancing at the code
in llvm/utils/lit/lit/ShUtils.sh I don't see anything supporting command
substitution.

- Matthias
> On Aug 2, 2017, at 4:22 PM, don hinton via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Btw, this works on *nix type systems, but I'm not sure about Windows.
> 
> 
> On Wed, Aug 2, 2017 at 4:06 PM, don hinton <hintonda at gmail.com
<mailto:hintonda at gmail.com>> wrote:
> Is there a way to do this with llvm-lit, i.e., use the equivalent of
backticks?
> 
> foo takes a single argument, but doesn't read from stdin.
> 
> // RUN foo some_arg > %t; FileCheck %s < %t
> // RUN foo `cat %t` | FileCheck --check-prefix=INVERSE
> 
> // CHECK: {{^[0-9]+$}}
> // INVERSE: some_arg 
> 
> thanks...
> don
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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