--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/Wconversion-real-integer.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,113 @@
+/* Test for diagnostics for Wconversion between floating-point and
+   integers.  */
+
+/* { dg-do compile } */
+/* { dg-skip-if "doubles are floats,ints are 16bits" { "avr-*-*" } } */
+/* { dg-options "-std=c99 -Wconversion" } */
+/* { dg-require-effective-target int32plus } */
+/* { dg-require-effective-target double64plus } */
+#include <limits.h>
+
+void fsi (signed int x);
+void fui (unsigned int x);
+void ffloat (float x);
+void fdouble (double x);
+
+float  vfloat;
+double vdouble;
+
+void h (void)
+{
+  unsigned int ui = 3;
+  int   si = 3;
+  unsigned char uc = 3;
+  signed char sc = 3;
+  float  f = 3;
+  double d = 3;
+
+  fsi (3.1f); /* { dg-warning "conversion" } */
+  si = 3.1f; /* { dg-warning "conversion" } */
+  fsi (3.1);  /* { dg-warning "conversion" } */
+  si = 3.1;  /* { dg-warning "conversion" } */
+  fsi (d);    /* { dg-warning "conversion" } */
+  si = d;    /* { dg-warning "conversion" } */
+  fui (-1.0); /* { dg-warning "overflow" } */
+  ui = -1.0;   /* { dg-warning "overflow" } */
+  ffloat (INT_MAX);  /* { dg-warning "conversion" } */
+  vfloat = INT_MAX;  /* { dg-warning "conversion" } */
+  ffloat (16777217); /* { dg-warning "conversion" } */
+  vfloat = 16777217; /* { dg-warning "conversion" } */
+  ffloat (si); /* { dg-warning "conversion" } */
+  vfloat = si; /* { dg-warning "conversion" } */
+  ffloat (ui); /* { dg-warning "conversion" } */
+  vfloat = ui; /* { dg-warning "conversion" } */
+
+  fsi (3);
+  si = 3;
+  fsi (3.0f);
+  si = 3.0f;
+  fsi (3.0);
+  si = 3.0;
+  fsi (16777217.0f);
+  si = 16777217.0f;
+  fsi ((int) 3.1);
+  si = (int) 3.1;
+  ffloat (3U);
+  vfloat = 3U;
+  ffloat (3);
+  vfloat = 3;
+  ffloat (INT_MIN);
+  vfloat = INT_MIN;
+  ffloat (uc);
+  vfloat = uc;
+  ffloat (sc);
+  vfloat = sc;
+
+  fdouble (UINT_MAX);
+  vdouble = UINT_MAX;
+  fdouble (ui);
+  vdouble = ui;
+  fdouble (si);
+  vdouble = si;
+}
+
+
+void fss (signed short x);
+void fus (unsigned short x);
+void fsc (signed char x);
+void fuc (unsigned char x);
+
+void h2 (void)
+{
+  unsigned short int us;
+  short int   ss;
+  unsigned char uc;
+  signed char sc;
+  
+  fss (4294967294.0); /* { dg-warning "conversion" } */
+  ss = 4294967294.0; /* { dg-warning "conversion" } */
+  fss (-4294967294.0);  /* { dg-warning "conversion" } */
+  ss = -4294967294.0;  /* { dg-warning "conversion" } */
+  fus (4294967294.0); /* { dg-warning "conversion" } */
+  us = 4294967294.0; /* { dg-warning "conversion" } */
+  fus (-4294967294.0);  /* { dg-warning "conversion" } */
+  us = -4294967294.0;  /* { dg-warning "conversion" } */
+
+  fsc (500.0); /* { dg-warning "conversion" } */
+  sc = 500.0; /* { dg-warning "conversion" } */
+  fsc (-500.0);  /* { dg-warning "conversion" } */
+  sc = -500.0;  /* { dg-warning "conversion" } */
+  fuc (500.0); /* { dg-warning "conversion" } */
+  uc = 500.0; /* { dg-warning "conversion" } */
+  fuc (-500.0);  /* { dg-warning "conversion" } */
+  uc = -500.0;  /* { dg-warning "conversion" } */
+
+  fss (500.0);
+  ss = 500.0;
+  fss (-500.0);
+  ss = -500.0;
+  fus (500.0); 
+  us = 500.0; 
+  fus (-500.0);   /* { dg-warning "conversion" } */
+  us = -500.0;    /* { dg-warning "conversion" } */
+}