[gcc/devel/ranger] Avoid g++.dg/lto/alias-4_0.C test failure on ARM [PR91322]

[Aldy Hernandez]

https://gcc.gnu.org/g:f60979edbfcf6ce2cbf2cb09b8af8c125ff7774f

commit f60979edbfcf6ce2cbf2cb09b8af8c125ff7774f
Author: Jan Hubicka <jh@suse.cz>
Date:   Thu Apr 9 14:12:36 2020 +0200

    Avoid g++.dg/lto/alias-4_0.C test failure on ARM [PR91322]
    
            PR tree-optimization/91322
            * g++.dg/lto/alias-4_0.C: Avoid conflict with va_list on ARM and add
            a template testing that.

Diff:
---
 gcc/testsuite/ChangeLog              | 6 ++++++
 gcc/testsuite/g++.dg/lto/alias-4_0.C | 8 +++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 991241ee27f..fac41ca63b5 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2020-04-09  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR tree-optimization/91322
+	* g++.dg/lto/alias-4_0.C: Avoid conflict with va_list on ARM and add
+	a template testing that
+
 2020-04-09  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* lib/scanasm.exp (check-function-bodies): Treat the third
diff --git a/gcc/testsuite/g++.dg/lto/alias-4_0.C b/gcc/testsuite/g++.dg/lto/alias-4_0.C
index 410c3140baf..3d386324753 100644
--- a/gcc/testsuite/g++.dg/lto/alias-4_0.C
+++ b/gcc/testsuite/g++.dg/lto/alias-4_0.C
@@ -1,11 +1,14 @@
 /* { dg-lto-do run } */
-/* { dg-lto-options { { -O3 -flto -fno-early-inlining } } } */
+/* { dg-lto-options { { -O3 -flto -fno-early-inlining -fdump-ipa-cgraph} } } */
 __attribute__ ((used))
 short *ptr_init, **ptr=&ptr_init;
 
 __attribute__ ((used))
 struct a {
   int *aptr;
+  /* On ARM va_list is an anonymous structure containing pointer. 
+     This disable ODR TBAA on it.  */
+  short b;
 } a, *aptr=&a;
 
 void
@@ -29,3 +32,6 @@ main()
   test ();
   return 0;
 }
+/* On ARM the testcase used to fial because struct a got in conflict with builtin
+   va_list type.  Check that this does not happen.  */
+/* { dg-final { scan-wpa-ipa-dump-not "ODR and non-ODR type conflict" "cgraph"  } } */