[llvm-commits] PATCH: Add CHECK-FIRST/LAST to FIleCheck

Argyris Kyrtzidis akyrtzi at gmail.com
Wed Sep 30 15:19:21 PDT 2009

On Oct 1, 2009, at 12:53 AM, Chris Lattner wrote:

> On Sep 30, 2009, at 2:51 PM, Argyris Kyrtzidis wrote:
>> Actually, using these directives is not flexible enough, e.g you  
>> can't use them to verify that the output is only one line.
>> I attached a new patch that adds 2 command lines instead:
>> -empty-before    - Nothing comes before the first check
>> -empty-after      - Nothing comes after the last check
>> If you want to make sure that the only output is the check line,  
>> you do something like:
>> // RUN: FileCheck -empty-before -empty-after
>> // CHECK: foo
>> Ok to go in ?
> can't CHECK-NOT be used for this?  If a NOT could be added before  
> the first line, then you could do CHECK-NOT: {{.}} or something like  
> that.

"CHECK-NOT: {{.}}" is not good because it will reject inputs that have  
characters on the same line as 'foo', e.g.

"bar foo"

should be a valid input but the above CHECK-NOT will reject it.

I couldn't put a CHECK-NOT to work as the -empty-before (and -after),  
any suggestions ?


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