[llvm-dev] [RFC] FileCheck: (dis)allowing unused prefixes

[Mircea Trofin via llvm-dev]

Actually, it's the 'GISEL:' that's missing. Here's what you get after the
patch is applied, if you add --allow-unused-prefixes=true to the FileCheck
call in both RUN lines:

$ build-all-Release/bin/llvm-lit
llvm/test/TableGen/GlobalISelEmitter-immAllZeroOne.td -a
-- Testing: 1 tests, 1 workers --
FAIL: LLVM :: TableGen/GlobalISelEmitter-immAllZeroOne.td (1 of 1)
******************** TEST 'LLVM ::
TableGen/GlobalISelEmitter-immAllZeroOne.td' FAILED ********************
Script:
--
: 'RUN: at line 1';   /other/llvm-project/build-all-Release/bin/llvm-tblgen
-gen-global-isel -warn-on-skipped-patterns -optimize-match-table=false -I
/other/llvm-project/llvm/test/TableGen/../../include -I
/other/llvm-project/llvm/test/TableGen/Common
/other/llvm-project/llvm/test/TableGen/GlobalISelEmitter-immAllZeroOne.td
-o - | /other/llvm-project/build-all-Release/bin/FileCheck
-check-prefixes=GISEL-NOOPT,GISEL
/other/llvm-project/llvm/test/TableGen/GlobalISelEmitter-immAllZeroOne.td
--allow-unused-prefixes=false
: 'RUN: at line 2';   /other/llvm-project/build-all-Release/bin/llvm-tblgen
-gen-global-isel -warn-on-skipped-patterns -optimize-match-table=true -I
/other/llvm-project/llvm/test/TableGen/../../include -I
/other/llvm-project/llvm/test/TableGen/Common
/other/llvm-project/llvm/test/TableGen/GlobalISelEmitter-immAllZeroOne.td
-o - | /other/llvm-project/build-all-Release/bin/FileCheck
-check-prefixes=GISEL-OPT,GISEL
/other/llvm-project/llvm/test/TableGen/GlobalISelEmitter-immAllZeroOne.td
--allow-unused-prefixes=false
--
Exit Code: 2

Command Output (stderr):
--
error: no check strings found with prefix 'GISEL:'

--

********************
********************
Failed Tests (1):
  LLVM :: TableGen/GlobalISelEmitter-immAllZeroOne.td


Testing Time: 0.17s
  Failed: 1

On Thu, Oct 29, 2020 at 1:48 PM Chris Tetreault via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> It seems like nothing is checking GISEL-NOOPT-NEXT and GISEL-OPT-NEXT.
> Perhaps this is the issue?
>
> -----Original Message-----
> From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Paul C.
> Anagnostopoulos via llvm-dev
> Sent: Thursday, October 29, 2020 1:30 PM
> To: llvm-dev at lists.llvm.org
> Subject: [EXT] Re: [llvm-dev] [RFC] FileCheck: (dis)allowing unused
> prefixes
>
> I'm not very familiar with FileCheck yet so this may be a silly question.
> I noticed that TableGen/GlobalISelEmitter-immAllZeroOne.td is on the list,
> so I checked it out. If I understand correctly, I expect GISEL-OPT and/or
> GISEL-NOOPT to be misspelled somewhere, but they are not. Can someone sort
> me out?
>
>
> // RUN: llvm-tblgen -gen-global-isel -warn-on-skipped-patterns
> -optimize-match-table=false -I %p/../../include -I %p/Common %s -o - |
> FileCheck -check-prefixes=GISEL-NOOPT,GISEL %s // RUN: llvm-tblgen
> -gen-global-isel -warn-on-skipped-patterns -optimize-match-table=true -I
> %p/../../include -I %p/Common %s -o - | FileCheck
> -check-prefixes=GISEL-OPT,GISEL %s
>
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