[PATCH] D15705: Adding a scripted test for PR25717

[Yunzhong Gao via cfe-commits]

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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