src/llvm-project/llvm/test/FileCheck/check-substring-multi-prefix.txt - toolchain/rustc - Git at Google

 // RUN: FileCheck -check-prefix=AAAOVERLAP -check-prefix=OVERLAP -input-file %s %s

 foo
 bar
 buzz

 // Use regex notation so the checks don't match themselves.
 OVERLAP: fo{{o}}
 AAAOVERLAP: ba{{r}}
 OVERLAP: buz{{z}}
	// RUN: FileCheck -check-prefix=AAAOVERLAP -check-prefix=OVERLAP -input-file %s %s

	foo
	bar
	buzz

	// Use regex notation so the checks don't match themselves.
	OVERLAP: fo{{o}}
	AAAOVERLAP: ba{{r}}
	OVERLAP: buz{{z}}