[patch, testsuite] Tests to _Complex type

[Yao Qi <yao at codesourcery dot com>]

When I am fixing GDB's inf-call in one port, I find tests to _Complex
type is quite limited, especially on argument passing, there is none.
This patch is to add more tests to _Complex type on argument passing and
vararg support.

Of course, these changes can be split, and moved to callfuncs.exp and
varargs.exp respectively.  I don't know to what extent _Complex is
supported on all GDB ports, so I put all _Complex related stuff into
complex.exp.

I run this case on these three systems I have, and some problems are
exposed:

i686-pc-linux-gnu: two SIGSEGV
FAIL: gdb.base/complex.exp: print find_max_double_real(4, dc1, dc2, dc3,
dc4)
FAIL: gdb.base/complex.exp: print complex_double_on_stackprint

armv7l-unknown-linux-gnueabi: four SIGSEGV
FAIL: gdb.base/complex.exp: print find_max_float_real(4, fc1, fc2, f3, f4)
FAIL: gdb.base/complex.exp: print find_max_double_real(4, dc1, dc2, dc3,
dc4)
FAIL: gdb.base/complex.exp: print complex_float_on_stackprint
FAIL: gdb.base/complex.exp: print complex_double_on_stackprint

x86_64-unknown-linux-gnu:
FAIL: gdb.base/complex.exp: print find_max_float_real(4, fc1, fc2, f3, f4)
FAIL: gdb.base/complex.exp: print find_max_double_real(4, dc1, dc2, dc3,
dc4)
FAIL: gdb.base/complex.exp: print complex_float_on_stackprint
FAIL: gdb.base/complex.exp: print complex_double_on_stackprint

This case causes new fails, so shall I kfail it?  Comments are welcome.

-- 
Yao (éå)

gdb/testsuite/
2011-05-06  Yao Qi  <yao@codesourcery.com>

	* gdb.base/complex.c (find_max_float_real): New.
	(find_max_double_real, complex_double_on_stack): New.
	(complex_float_on_stack): New.
	* gdb.base/complex.exp: Call these new functions in complex.c.

---
 gdb/testsuite/gdb.base/complex.c   |   78 ++++++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.base/complex.exp |   19 +++++++++
 2 files changed, 97 insertions(+), 0 deletions(-)

diff --git a/gdb/testsuite/gdb.base/complex.c b/gdb/testsuite/gdb.base/complex.c
index 9b890c9..7623b6d 100644
--- a/gdb/testsuite/gdb.base/complex.c
+++ b/gdb/testsuite/gdb.base/complex.c
@@ -20,6 +20,7 @@ Free Software Foundation, Inc.
    a complex number.  */
 
 #include <stdlib.h>
+#include <stdarg.h>
 
 typedef __complex__ float cf;
 struct x { char c; cf f; } __attribute__ ((__packed__));
@@ -28,11 +29,14 @@ extern void f4 (struct unpacked_x*);
 extern void f3 (void);
 extern void f2 (struct x*);
 extern void f1 (void);
+extern void marker (void);
 int
 main (void)
 {
   f1 ();
   f3 ();
+  marker ();
+
   exit (0);
 }
 
@@ -67,3 +71,77 @@ f4 (struct unpacked_x *y)
   if (y->f != 1 || y->c != 42)
     abort ();
 }
+
+
+extern float crealf (float _Complex);
+
+float _Complex fc1 = 1.0F + 1.0iF;
+float _Complex fc2 = 2.0F + 2.0iF;
+float _Complex fc3 = 3.0F + 3.0iF;
+float _Complex fc4 = 4.0F + 4.0iF;
+
+float _Complex
+find_max_float_real (int num_vals, ...)
+{
+  float _Complex max = 0.0F + 0.0iF;
+  float _Complex x;
+  va_list argp;
+  int i;
+
+  va_start(argp, num_vals);
+  for (i = 0; i < num_vals; i++)
+    {
+      x = va_arg (argp, float _Complex);
+      if (crealf (max) < crealf (x)) max = x;
+    }
+
+  return max;
+}
+
+extern double creal (double _Complex);
+double _Complex dc1 = 1.0 + 1.0i;
+double _Complex dc2 = 2.0 + 2.0i;
+double _Complex dc3 = 3.0 + 3.0i;
+double _Complex dc4 = 4.0 + 4.0i;
+
+double _Complex
+find_max_double_real (int num_vals, ...)
+{
+  double _Complex max = 0.0F + 0.0iF;
+  double _Complex x;
+  va_list argp;
+  int i;
+
+  va_start(argp, num_vals);
+  for (i = 0; i < num_vals; i++)
+    {
+      x = va_arg (argp, double _Complex);
+      if (creal (max) < creal (x)) max = x;
+    }
+
+  return max;
+}
+
+/* Force DC is passed on stack.  */
+_Complex double
+complex_double_on_stack (double f1, double f2, double f3, double f4, double f5,
+			 double f6, double f7, double f8, double f9, double f10,
+			 double f11, double f12, double f13, double f14,
+			 double f15, _Complex double dc)
+{
+  return dc;
+};
+
+/* Force FC is passed on stack.  */
+_Complex float
+complex_float_on_stack (double f1, double f2, double f3, double f4, double f5,
+			 double f6, double f7, double f8, double f9, double f10,
+			 double f11, double f12, double f13, double f14,
+			 double f15, _Complex float fc)
+{
+  return fc;
+};
+
+void marker ()
+{
+}
diff --git a/gdb/testsuite/gdb.base/complex.exp b/gdb/testsuite/gdb.base/complex.exp
index 27af703..cb16fa5 100644
--- a/gdb/testsuite/gdb.base/complex.exp
+++ b/gdb/testsuite/gdb.base/complex.exp
@@ -55,4 +55,23 @@ if [runto f4] then {
 	    "print complex value in C"
 }
 
+if [runto marker] then {
+    gdb_test "print find_max_float_real(4, fc1, fc2, fc3, fc4)" \
+	".*= 4 \\+ 4 \\* I" \
+	"print find_max_float_real(4, fc1, fc2, f3, f4)"
+
+    gdb_test "print find_max_double_real(4, dc1, dc2, dc3, dc4)" \
+	".*= 4 \\+ 4 \\* I" \
+	"print find_max_double_real(4, dc1, dc2, dc3, dc4)"
+
+    gdb_test "print complex_float_on_stack (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, fc1)" \
+	".*= 1 \\+ 1 \\* I" \
+	"print complex_float_on_stackprint"
+
+    gdb_test "print complex_double_on_stack (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, dc1)" \
+	".*= 1 \\+ 1 \\* I" \
+	"print complex_double_on_stackprint"
+
+}
+
 return 0
-- 
1.7.0.4