4 files changed, 24 insertions, 0 deletions
diff --git a/gcc/testsuite/c-c++-common/cpp/headerguard.c b/gcc/testsuite/c-c++-common/cpp/headerguard.c
new file mode 100644
index 00000000000..be63849d33c
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/cpp/headerguard.c
@@ -0,0 +1,8 @@
+/* { dg-do preprocess }  */
+/* Check header guards are optimized.  */
+
+#include "noheaderguard-b.h"
+#include "noheaderguard-b.h"
+#include "noheaderguard-a.h"
+
+/* { dg-final { scan-file headerguard.i {# [0-9]* "[^\n]*headerguard.c"\n\n*# [0-9]* "[^\n]*headerguard-b.h" 1\n\n*# [0-9]* "[^\n]*headerguard-a.h" 1\n\n*# [0-9]* "[^\n]*headerguard-b.h" 2\n\n*# [0-9]* "[^\n]*headerguard.c" 2\n} } } */
diff --git a/gcc/testsuite/c-c++-common/cpp/noheaderguard-a.h b/gcc/testsuite/c-c++-common/cpp/noheaderguard-a.h
new file mode 100644
index 00000000000..6a6c2b49e8f
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/cpp/noheaderguard-a.h
@@ -0,0 +1,3 @@
+#ifndef INNER
+#define INNER
+#endif
diff --git a/gcc/testsuite/c-c++-common/cpp/noheaderguard-b.h b/gcc/testsuite/c-c++-common/cpp/noheaderguard-b.h
new file mode 100644
index 00000000000..8b72a9fbb7a
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/cpp/noheaderguard-b.h
@@ -0,0 +1,4 @@
+#ifndef OUTER
+#define OUTER
+#include "noheaderguard-a.h"
+#endif
diff --git a/gcc/testsuite/c-c++-common/cpp/noheaderguard.c b/gcc/testsuite/c-c++-common/cpp/noheaderguard.c
new file mode 100644
index 00000000000..3e6fd876f1b
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/cpp/noheaderguard.c
@@ -0,0 +1,9 @@
+/* { dg-do preprocess }  */
+/* { dg-additional-options -fno-header-guard-opt }  */
+/* Check header guard optimization is disabled.  */
+
+#include "noheaderguard-b.h"
+#include "noheaderguard-b.h"
+#include "noheaderguard-a.h"
+
+/* { dg-final { scan-file noheaderguard.i {# [0-9]* "[^\n]*noheaderguard.c"\n\n*# [0-9]* "[^\n]*noheaderguard-b.h" 1\n\n*# [0-9]* "[^\n]*noheaderguard-a.h" 1\n\n*# [0-9]* "[^\n]*noheaderguard-b.h" 2\n\n*# [0-9]* "[^\n]*noheaderguard.c" 2\n\n*# [0-9]* "[^\n]*noheaderguard-b.h" 1\n\n*# [0-9]* "[^\n]*noheaderguard.c" 2\n\n*# [0-9]* "[^\n]*noheaderguard-a.h" 1\n\n*# [0-9]* "[^\n]*noheaderguard.c" 2\n} } } */