1 files changed, 70 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/f2c_4.c b/gcc/testsuite/gfortran.dg/f2c_4.c
index 0d64fc89b14..58f3ef1a2ab 100755
--- a/gcc/testsuite/gfortran.dg/f2c_4.c
+++ b/gcc/testsuite/gfortran.dg/f2c_4.c
@@ -1,4 +1,20 @@
+/*  Check -ff2c calling conventions
+    Return value of COMPLEX function is via an extra argument in the
+     calling sequence that points to where to store the return value
+    Additional underscore appended to function name
+  
+   Simplified from f2c output and tested with g77 */
+
+typedef float real;
+typedef double doublereal;
+typedef struct { real r, i; } complex;
+typedef struct { doublereal r, i; } doublecomplex;
+
 extern double f2c_4b__(double *);
+extern void f2c_4d__( complex *, complex *);
+extern void f2c_4f__( complex *, int *,complex *);
+extern void f2c_4h__( doublecomplex *, doublecomplex *);
+extern void f2c_4j__( doublecomplex *, int *, doublecomplex *);
 extern void abort (void);
 
 void f2c_4a__(void) {
@@ -7,3 +23,57 @@ void f2c_4a__(void) {
   b=f2c_4b__(&a);
   if ( a != b ) abort();
 }
+
+void f2c_4c__(void) {
+  complex x,ret_val;
+  x.r = 1234;
+  x.i = 5678;
+  f2c_4d__(&ret_val,&x);
+  if ( x.r != ret_val.r && x.i != ret_val.i ) abort();
+}
+
+void f2c_4e__(void) {
+  complex x,ret_val;
+  int i=0;
+  x.r = 1234;
+  x.i = 5678;
+  f2c_4f__(&ret_val,&i,&x);
+  if ( x.r != ret_val.r && x.i != ret_val.i ) abort();
+}
+
+void f2c_4g__(void) {
+  doublecomplex x,ret_val;
+  x.r = 1234;
+  x.i = 5678.0f;
+  f2c_4h__(&ret_val,&x);
+  if ( x.r != ret_val.r && x.i != ret_val.i ) abort();
+}
+
+void f2c_4i__(void) {
+  doublecomplex x,ret_val;
+  int i=0;
+  x.r = 1234.0f;
+  x.i = 5678.0f;
+  f2c_4j__(&ret_val,&i,&x);
+  if ( x.r != ret_val.r && x.i != ret_val.i ) abort();
+}
+
+void f2c_4k__(complex *ret_val, complex *x) {
+  ret_val->r = x->r;
+  ret_val->i = x->i;
+}
+
+void f2c_4l__(complex *ret_val, int *i, complex *x) {
+  ret_val->r = x->r;
+  ret_val->i = x->i;
+}
+
+void f2c_4m__(doublecomplex *ret_val, doublecomplex *x) {
+  ret_val->r = x->r;
+  ret_val->i = x->i;
+}
+
+void f2c_4n__(doublecomplex *ret_val, int *i, doublecomplex *x) {
+  ret_val->r = x->r;
+  ret_val->i = x->i;
+}