Add more tests for empty C++ class passinghjl/pr60336/master

	PR c++/60336
	PR middle-end/67239
	PR target/68355
	* g++.dg/pr60336-1.C: Likewise.
	* g++.dg/pr60336-2.C: Likewise.
	* g++.dg/pr60336-3.C: Likewise.
	* g++.dg/pr60336-4.C: Likewise.
	* g++.dg/pr60336-5.C: Likewise.
	* g++.dg/pr60336-6.C: Likewise.
	* g++.dg/pr60336-7.C: Likewise.
	* g++.dg/pr60336-8.C: Likewise.
	* g++.dg/pr60336-9.C: Likewise.
	* g++.dg/pr60336-10.C: Likewise.
	* g++.dg/pr60336-11.C: Likewise.
	* g++.dg/pr60336-12.C: Likewise.
	* g++.dg/pr68355.C: Likewise.

13 files changed, 409 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/pr60336-1.C b/gcc/testsuite/g++.dg/pr60336-1.C
new file mode 100644
index 00000000000..946f8accda2
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-1.C
@@ -0,0 +1,17 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2 -std=c++11 -fno-pic" }
+// { dg-require-effective-target fpic }
+
+struct dummy { };
+struct true_type { struct dummy i; };
+
+extern true_type y;
+extern void xxx (true_type c);
+
+void
+yyy (void)
+{
+  xxx (y);
+}
+
+// { dg-final { scan-assembler "jmp\[\t \]+\[^\$\]*?_Z3xxx9true_type" { target i?86-*-* x86_64-*-* } } }
diff --git a/gcc/testsuite/g++.dg/pr60336-10.C b/gcc/testsuite/g++.dg/pr60336-10.C
new file mode 100644
index 00000000000..58de85b963f
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-10.C
@@ -0,0 +1,50 @@
+// { dg-do run { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2" }
+
+#include <stdarg.h>
+
+struct dummy0 { };
+struct dummy1 { };
+struct dummy : dummy0, dummy1 { };
+
+void
+test (struct dummy a, int m, ...)
+{
+  va_list va_arglist;
+  int i;
+  int count = 0;
+
+  if (m == 0)
+    count++;
+  va_start (va_arglist, m);
+  i = va_arg (va_arglist, int);
+  if (i == 1)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 2)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 3)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 4)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 5)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 6)
+    count++;
+  va_end (va_arglist);
+  if (count != 7)
+    __builtin_abort ();
+}
+
+struct dummy a0;
+
+int
+main ()
+{
+  test (a0, 0, 1, 2, 3, 4, 5, 6);
+  return 0;
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-11.C b/gcc/testsuite/g++.dg/pr60336-11.C
new file mode 100644
index 00000000000..5b03b2683ab
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-11.C
@@ -0,0 +1,56 @@
+// { dg-do run { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2" }
+
+#include <stdarg.h>
+
+struct dummy0
+{
+  void bar (void);
+};
+struct dummy1
+{
+  void foo (void);
+};
+struct dummy : dummy0, dummy1 { };
+
+void
+test (struct dummy a, int m, ...)
+{
+  va_list va_arglist;
+  int i;
+  int count = 0;
+
+  if (m == 0)
+    count++;
+  va_start (va_arglist, m);
+  i = va_arg (va_arglist, int);
+  if (i == 1)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 2)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 3)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 4)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 5)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 6)
+    count++;
+  va_end (va_arglist);
+  if (count != 7)
+    __builtin_abort ();
+}
+
+struct dummy a0;
+
+int
+main ()
+{
+  test (a0, 0, 1, 2, 3, 4, 5, 6);
+  return 0;
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-12.C b/gcc/testsuite/g++.dg/pr60336-12.C
new file mode 100644
index 00000000000..1cae76834fd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-12.C
@@ -0,0 +1,57 @@
+// { dg-do run { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2" }
+
+#include <stdarg.h>
+
+struct dummy0
+{
+};
+struct dummy1
+{
+  unsigned : 15;
+};
+struct dummy : dummy0, dummy1
+{
+};
+
+void
+test (struct dummy a, int m, ...)
+{
+  va_list va_arglist;
+  int i;
+  int count = 0;
+
+  if (m == 0)
+    count++;
+  va_start (va_arglist, m);
+  i = va_arg (va_arglist, int);
+  if (i == 1)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 2)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 3)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 4)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 5)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 6)
+    count++;
+  va_end (va_arglist);
+  if (count != 7)
+    __builtin_abort ();
+}
+
+struct dummy a0;
+
+int
+main ()
+{
+  test (a0, 0, 1, 2, 3, 4, 5, 6);
+  return 0;
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-2.C b/gcc/testsuite/g++.dg/pr60336-2.C
new file mode 100644
index 00000000000..f18cf1e4425
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-2.C
@@ -0,0 +1,48 @@
+// { dg-do run }
+// { dg-options "-O2 -Wabi=9" }
+
+#include <stdarg.h>
+
+struct dummy { };
+
+void
+test (struct dummy a, int m, ...) // { dg-warning "empty" }
+{
+  va_list va_arglist;
+  int i;
+  int count = 0;
+
+  if (m == 0)
+    count++;
+  va_start (va_arglist, m);
+  i = va_arg (va_arglist, int);
+  if (i == 1)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 2)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 3)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 4)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 5)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 6)
+    count++;
+  va_end (va_arglist);
+  if (count != 7)
+    __builtin_abort ();
+}
+
+struct dummy a0;
+
+int
+main ()
+{
+  test (a0, 0, 1, 2, 3, 4, 5, 6); // { dg-warning "empty" }
+  return 0;
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-3.C b/gcc/testsuite/g++.dg/pr60336-3.C
new file mode 100644
index 00000000000..334a8792016
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-3.C
@@ -0,0 +1,15 @@
+// { dg-do compile }
+// { dg-options "-O2 -Wabi=9" }
+
+struct dummy { struct{}__attribute__((aligned (4))) a[7]; };
+
+extern void test1 (struct dummy, ...);
+extern void (*test2) (struct dummy, ...);
+
+void
+foo ()
+{
+  struct dummy a0;
+  test1 (a0, 1); // { dg-warning "empty" }
+  test2 (a0, 1); // { dg-warning "empty" }
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-4.C b/gcc/testsuite/g++.dg/pr60336-4.C
new file mode 100644
index 00000000000..b103724310e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-4.C
@@ -0,0 +1,48 @@
+// { dg-do run }
+// { dg-options "-O2" }
+
+#include <stdarg.h>
+
+struct dummy { };
+
+void
+test (struct dummy a, int m, ...)
+{
+  va_list va_arglist;
+  int i;
+  int count = 0;
+
+  if (m == 0)
+    count++;
+  va_start (va_arglist, m);
+  i = va_arg (va_arglist, int);
+  if (i == 1)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 2)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 3)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 4)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 5)
+    count++;
+  i = va_arg (va_arglist, int);
+  if (i == 6)
+    count++;
+  va_end (va_arglist);
+  if (count != 7)
+    __builtin_abort ();
+}
+
+struct dummy a0;
+
+int
+main ()
+{
+  test (a0, 0, 1, 2, 3, 4, 5, 6);
+  return 0;
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-5.C b/gcc/testsuite/g++.dg/pr60336-5.C
new file mode 100644
index 00000000000..a051f6e6105
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-5.C
@@ -0,0 +1,17 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2 -std=c++11 -fno-pic" }
+// { dg-require-effective-target fpic }
+
+struct dummy { };
+struct true_type { struct dummy i; struct dummy j; };
+
+extern true_type y;
+extern void xxx (true_type c);
+
+void
+yyy (void)
+{
+  xxx (y);
+}
+
+// { dg-final { scan-assembler "jmp\[\t \]+\[^\$\]*?_Z3xxx9true_type" { target i?86-*-* x86_64-*-* } } }
diff --git a/gcc/testsuite/g++.dg/pr60336-6.C b/gcc/testsuite/g++.dg/pr60336-6.C
new file mode 100644
index 00000000000..22728d364fd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-6.C
@@ -0,0 +1,17 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2 -std=c++11 -fno-pic" }
+// { dg-require-effective-target fpic }
+
+struct dummy { };
+struct true_type { struct dummy i1; struct dummy i2; };
+
+extern true_type y;
+extern void xxx (true_type c);
+
+void
+yyy (void)
+{
+  xxx (y);
+}
+
+// { dg-final { scan-assembler "jmp\[\t \]+\[^\$\]*?_Z3xxx9true_type" { target i?86-*-* x86_64-*-* } } }
diff --git a/gcc/testsuite/g++.dg/pr60336-7.C b/gcc/testsuite/g++.dg/pr60336-7.C
new file mode 100644
index 00000000000..5fc8320c7de
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-7.C
@@ -0,0 +1,17 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2 -std=c++11 -fno-pic" }
+// { dg-require-effective-target fpic }
+
+struct dummy { };
+struct true_type { struct dummy i[120]; };
+
+extern true_type y;
+extern void xxx (true_type c);
+
+void
+yyy (void)
+{
+  xxx (y);
+}
+
+// { dg-final { scan-assembler "jmp\[\t \]+\[^\$\]*?_Z3xxx9true_type" { target i?86-*-* x86_64-*-* } } }
diff --git a/gcc/testsuite/g++.dg/pr60336-8.C b/gcc/testsuite/g++.dg/pr60336-8.C
new file mode 100644
index 00000000000..38b6d344a8a
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-8.C
@@ -0,0 +1,15 @@
+// { dg-do compile }
+// { dg-options "-O2 -Wabi=9" }
+
+struct dummy { struct{} a[7][3]; };
+
+extern void test1 (struct dummy, ...);
+extern void (*test2) (struct dummy, ...);
+
+void
+foo ()
+{
+  struct dummy a0;
+  test1 (a0, 1); // { dg-warning "empty" }
+  test2 (a0, 1); // { dg-warning "empty" }
+}
diff --git a/gcc/testsuite/g++.dg/pr60336-9.C b/gcc/testsuite/g++.dg/pr60336-9.C
new file mode 100644
index 00000000000..3d768c06f14
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr60336-9.C
@@ -0,0 +1,28 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2 -std=c++11 -fno-pic" }
+// { dg-require-effective-target fpic }
+
+struct A1 {}; struct A2 {};
+struct B1 { A1 a; A2 b; }; struct B2 { A1 a; A2 b; };
+struct C1 { B1 a; B2 b; }; struct C2 { B1 a; B2 b; };
+struct D1 { C1 a; C2 b; }; struct D2 { C1 a; C2 b; };
+struct E1 { D1 a; D2 b; }; struct E2 { D1 a; D2 b; };
+struct F1 { E1 a; E2 b; }; struct F2 { E1 a; E2 b; };
+struct G1 { F1 a; F2 b; }; struct G2 { F1 a; F2 b; };
+struct H1 { G1 a; G2 b; }; struct H2 { G1 a; G2 b; };
+struct I1 { H1 a; H2 b; }; struct I2 { H1 a; H2 b; };
+struct J1 { I1 a; I2 b; }; struct J2 { I1 a; I2 b; };
+struct dummy { J1 a; J2 b; };
+
+struct true_type { struct dummy i; };
+
+extern true_type y;
+extern void xxx (true_type c);
+
+void
+yyy (void)
+{
+  xxx (y);
+}
+
+// { dg-final { scan-assembler "jmp\[\t \]+\[^\$\]*?_Z3xxx9true_type" { target i?86-*-* x86_64-*-* } } }
diff --git a/gcc/testsuite/g++.dg/pr68355.C b/gcc/testsuite/g++.dg/pr68355.C
new file mode 100644
index 00000000000..5c2f0da3fd3
--- /dev/null
+++ b/gcc/testsuite/g++.dg/pr68355.C
@@ -0,0 +1,24 @@
+// { dg-do compile { target i?86-*-* x86_64-*-* } }
+// { dg-options "-O2 -std=c++11 -fno-pic" }
+// { dg-require-effective-target fpic }
+
+template<typename _Tp, _Tp __v>
+struct integral_constant
+{
+  static constexpr _Tp value = __v;
+  typedef _Tp value_type;
+  typedef integral_constant<_Tp, __v> type;
+  constexpr operator value_type() const { return value; }
+};
+
+typedef integral_constant<bool, true> true_type;
+extern void xxx (true_type c);
+
+void
+yyy (void)
+{
+  true_type y;
+  xxx (y);
+}
+
+// { dg-final { scan-assembler "jmp\[\t \]+\[^\$\]*?_Z3xxx17integral_constantIbLb1EE" { target i?86-*-* x86_64-*-* } } }