test/Preprocessor/skipping_unclean.c - llvm-project/clang - Git at Google

 // RUN: %clang_cc1 -E %s | FileCheck --strict-whitespace %s

 #if 0
 blah
 #\
 else
 bark
 #endif
 // CHECK: {{^}}bark{{$}}
	// RUN: %clang_cc1 -E %s \| FileCheck --strict-whitespace %s

	#if 0
	blah
	#\
	else
	bark
	#endif
	// CHECK: {{^}}bark{{$}}