llvm dev - Apr 2018 - Writing tests with Filecheck without emitting output to stdin

Hello
 I have pass operating on  bitcode file which produces more than one
equivalent representation.

opt --my-pass <%s | Filecheck  %s

--my-pass generates  files a.rpt b.rpt c.rpt . How do i write test without
writing all 3 files to stdin.

I have considered CHECK-LABEL for each. it creates bulky checks.


Thanks
Mahesh
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Hi Mahesh,

On 31 March 2018 at 11:45, Mahesh Attarde via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> opt --my-pass <%s | Filecheck  %s
>
> --my-pass generates  files a.rpt b.rpt c.rpt . How do i write test without
> writing all 3 files to stdin.
You can run FileCheck over them on separate RUN lines assuming you
know the filename (which I assume you do since you'd be completely
screwed without it).

; RUN: FileCheck %s --check-prefix=CHECK-A < a.rpt
; RUN: FileCheck %s --check-prefix=CHECK-B < b.rpt
; RUN: FileCheck %s --check-prefix=CHECK-C < c.rpt

Cheers.

Tim.

That works. Thanks.

One more followup question though.
Once i run opt on bitcode, there is not useful output/transform on bitcode.
this rpt files are extra.
I am hoping to do something like this,

; RUN: FileCheck  --input-file=a.rpt.gold --check-prefix=CHECK-A < a.rpt
; RUN: FileCheck  --input-file=b.rpt.gold --check-prefix=CHECK-B < b.rpt

i did not find much examples in tests hence question.
does this have any potential issue in matching.

~Mahesh


On Sat, Mar 31, 2018 at 5:08 PM, Tim Northover <t.p.northover at
gmail.com>
wrote:
> Hi Mahesh,
>
> On 31 March 2018 at 11:45, Mahesh Attarde via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> > opt --my-pass <%s | Filecheck  %s
> >
> > --my-pass generates  files a.rpt b.rpt c.rpt . How do i write test
> without
> > writing all 3 files to stdin.
>
> You can run FileCheck over them on separate RUN lines assuming you
> know the filename (which I assume you do since you'd be completely
> screwed without it).
>
> ; RUN: FileCheck %s --check-prefix=CHECK-A < a.rpt
> ; RUN: FileCheck %s --check-prefix=CHECK-B < b.rpt
> ; RUN: FileCheck %s --check-prefix=CHECK-C < c.rpt
>
> Cheers.
>
> Tim.
>
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See: http://llvm.org/docs/CommandGuide/FileCheck.html

It is not required to pipe output to FileCheck; there is the --input-file
option, which allows you to run FileCheck on an existing disk file.  Something
like this:
FileCheck %s --input-file a.rpt --check-prefix=A
FileCheck %s --input-file b.rpt --check-prefix=B
FileCheck %s --input-file c.rpt --check-prefix=C

If there are common parts to each .rpt file that you want to check, you can
write those checks with another prefix and use the --check-prefixes option to
specify all the ones that are appropriate to each run of FileCheck.

I am sure you can find some existing tests with examples of these patterns to
give you ideas how to write your test.  If you still have questions please feel
free to ask them.
--paulr

From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Mahesh
Attarde via llvm-dev
Sent: Saturday, March 31, 2018 6:45 AM
To: llvm-dev
Subject: [llvm-dev] Writing tests with Filecheck without emitting output to
stdin

Hello
 I have pass operating on  bitcode file which produces more than one equivalent
representation.
opt --my-pass <%s | Filecheck  %s
--my-pass generates  files a.rpt b.rpt c.rpt . How do i write test without
writing all 3 files to stdin.
I have considered CHECK-LABEL for each. it creates bulky checks.

Thanks
Mahesh

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Thanks that helps.
I was unclear about term "input-file" used in doc. Now it is clear
with ur
example.

Mahesh

On Sun, Apr 1, 2018, 11:35 PM <paul.robinson at sony.com> wrote:
> See: http://llvm.org/docs/CommandGuide/FileCheck.html
>
>
>
> It is not required to pipe output to FileCheck; there is the --input-file
> option, which allows you to run FileCheck on an existing disk file.
> Something like this:
>
> FileCheck %s --input-file a.rpt --check-prefix=A
>
> FileCheck %s --input-file b.rpt --check-prefix=B
>
> FileCheck %s --input-file c.rpt --check-prefix=C
>
>
>
> If there are common parts to each .rpt file that you want to check, you
> can write those checks with another prefix and use the --check-prefixes
> option to specify all the ones that are appropriate to each run of
> FileCheck.
>
>
>
> I am sure you can find some existing tests with examples of these patterns
> to give you ideas how to write your test.  If you still have questions
> please feel free to ask them.
>
> --paulr
>
>
>
> *From:* llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] *On Behalf Of
*Mahesh
> Attarde via llvm-dev
> *Sent:* Saturday, March 31, 2018 6:45 AM
> *To:* llvm-dev
> *Subject:* [llvm-dev] Writing tests with Filecheck without emitting
> output to stdin
>
>
>
> Hello
>
>  I have pass operating on  bitcode file which produces more than one
> equivalent representation.
>
> opt --my-pass <%s | Filecheck  %s
>
> --my-pass generates  files a.rpt b.rpt c.rpt . How do i write test without
> writing all 3 files to stdin.
>
> I have considered CHECK-LABEL for each. it creates bulky checks.
>
> Thanks
>
> Mahesh
>
>
>
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