[PATCH] D15705: Adding a scripted test for PR25717

[Rafael Espíndola via cfe-commits]

Can't you use the preprocessor to  produce a large output? See the
testcase in https://llvm.org/bugs/show_bug.cgi?id=10651#c10 for
example.

Cheers,
Rafael

On 21 December 2015 at 20:07, Yunzhong Gao via cfe-commits
<cfe-commits at lists.llvm.org> wrote:
> ygao created this revision.
> ygao added subscribers: cfe-commits, rsandifo, majnemer, aaron.ballman.
>
> Hi,
> I am trying to add a test for PR25717. The test itself is fairly straight-forward: it generates a
> large .c temporary file on the fly and then runs the preprocessor over the generated file to
> make sure we do not see any unexpected fatal errors.
> I have never added a scripted test before, so it would be really nice if someone with this
> experience could take a look that I did make all the necessary changes.
> Many thanks in advance,
> - Gao
>
> http://reviews.llvm.org/D15705
>
> Files:
>   test/Preprocessor/bigoutput.py
>   test/Preprocessor/lit.local.cfg
>
> Index: test/Preprocessor/lit.local.cfg
> ===================================================================
> --- test/Preprocessor/lit.local.cfg
> +++ test/Preprocessor/lit.local.cfg
> @@ -0,0 +1,2 @@
> +config.suffixes = ['.c', '.cpp', '.m', '.mm', '.cu', '.cl', '.s', '.S', '.py']
> +
> Index: test/Preprocessor/bigoutput.py
> ===================================================================
> --- test/Preprocessor/bigoutput.py
> +++ test/Preprocessor/bigoutput.py
> @@ -0,0 +1,11 @@
> +# RUN: python %s
> +# RUN: %clang_cc1 -E -x c bigoutput.c | FileCheck %s
> +
> +# Make sure clang does not crash during preprocessing
> +# CHECK-NOT: fatal error
> +
> +f = open("bigoutput.c", "wb")
> +for i in range(0, 15000):
> +  # this test requires UNIX line endings
> +  f.write("int v%d;\n" % i)
> +f.close()
>
>
>
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