* gcc.dg/torture/20180712-1.c: New test.

From-SVN: r262579

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 5992e0d56d4bfa2a56a4b6e050461f7dd54e74ed..4ce5afdc41621e2601220c3c347e5deead1ca585 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,5 +1,7 @@
 2018-07-12  Jakub Jelinek  <jakub@redhat.com>
 
+       * gcc.dg/torture/20180712-1.c: New test.
+
        PR tree-optimization/86492
        * gcc.c-torture/execute/pr86492.c: New test.
 

diff --git a/gcc/testsuite/gcc.dg/torture/20180712-1.c b/gcc/testsuite/gcc.dg/torture/20180712-1.c
new file mode 100644 (file)
index 0000000..3ac2c7f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/20180712-1.c
@@ -0,0 +1,76 @@
+/* { dg-do run } */
+/* { dg-additional-options "-fstack-protector" { target fstack_protector } } */
+/* { dg-additional-options "-fPIC" { target fpic } } */
+
+struct S { int *l, *u; };
+int a[3];
+
+__attribute__((noipa)) struct S
+foo (void)
+{
+  int *p = a, *q = a + 1;
+  struct S s;
+  asm volatile ("" : "+g" (p), "+g" (q) : : "memory");
+  s.l = p;
+  s.u = q;
+  a[0]++;
+  return s;
+}
+
+__attribute__((noipa)) void
+bar (struct S *x)
+{
+  asm volatile ("" : : "g" (x) : "memory");
+  if (x->l != a || x->u != a + 1)
+    __builtin_abort ();
+  a[1]++;
+}
+
+__attribute__((noipa)) int
+baz (int *x, int *y)
+{
+  int r = -1;
+  asm volatile ("" : "+g" (r) : "g" (x), "g" (y) : "memory");
+  a[2]++;
+  return r;
+}
+
+__attribute__((noipa)) void
+quux (void)
+{
+  asm volatile ("" : : : "memory");
+}
+
+__attribute__((noipa)) void
+qux (void)
+{
+  struct S v = foo ();
+  struct S w;
+  struct S x = foo ();
+  int y = 0;
+
+  w.l = x.l;
+  w.u = x.u;
+  if (baz (x.l, v.l) > 0)
+    {
+      w.l = v.l;
+      y = 1;
+      quux ();
+    }
+  if (baz (x.u, v.u) < 0)
+    {
+      w.u = v.u;
+      y = 1;
+    }
+  if (y)
+    bar (&w);
+}
+
+int
+main ()
+{
+  qux ();
+  if (a[0] != 2 || a[1] != 1 || a[2] != 2)
+    __builtin_abort ();
+  return 0;
+}