[PATCH] testsuite: Fix tree-ssa/alias-access-path-13.c on 32bit platforms (PR 106216)

[Martin Jambor]

Hi,

for gcc.dg/tree-ssa/alias-access-path-13.c to work, SRA must think of
accesses to foo.inn.val and to foo itself as different ones, i.e. they
need to have different offset and size, which on 32bit platforms they
do not.  Fixed by replacing a dummy long int field of the union with a
struct of two integers.

Tested by:
  make -k check-gcc RUNTESTFLAGS="tree-ssa.exp=alias-access-path-13.c" and
  make -k check-gcc RUNTESTFLAGS="--target_board=unix'{-m32}' 
tree-ssa.exp=alias-access-path-13.c"
on an x86_64-linux, also with patched SRA to verify it still tests the
original intent.

I hope the fix is obvious enough (and it is only a testsuite change)
that I can commit it myself.

Thanks,

Martin


gcc/testsuite/ChangeLog:

2022-07-08  Martin Jambor  <mjam...@suse.cz>

        PR testsuite/106216
        * gcc.dg/tree-ssa/alias-access-path-13.c (union foo): Replace a long
        int field with a struct that is larger than an int also on 32bit
        platforms.
---
 gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-13.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-13.c 
b/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-13.c
index e502a97bc75..87a94f5bf31 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-13.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/alias-access-path-13.c
@@ -6,10 +6,15 @@ struct inn
   int val;
 };
 
+struct biggerstruct
+{
+  int a, b;
+};
+
 union foo
 {
   struct inn inn;
-  long int baz;
+  struct biggerstruct baz;
 } *fooptr;
 
 struct bar
-- 
2.36.1