llvm/test/TableGen/duplicate-include.td - llvm-project - Git at Google

 // RUN: llvm-tblgen -I %p %s | FileCheck %s

 // CHECK: def InInclude

 include "duplicate-include.inc"
 include "duplicate-include.inc"
	// RUN: llvm-tblgen -I %p %s \| FileCheck %s

	// CHECK: def InInclude

	include "duplicate-include.inc"
	include "duplicate-include.inc"