Add a testcase for PR target/66824

	PR target/66824
	* gcc.target/i386/pr66824.c:

From-SVN: r225929

gcc/testsuite/ChangeLog

+2015-07-17  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/66824
+	* gcc.target/i386/pr66824.c:
+
 2015-07-17  Andre Vehreschild  <vehre@gcc.gnu.org>
 
 	PR fortran/66035

gcc/testsuite/gcc.target/i386/pr66824.c

+/* { dg-do compile { target ia32 } } */
+/* { dg-options "-O2 -mno-sse -mno-mmx -mno-80387" } */
+/* { dg-final { scan-assembler-not "\.LC\[0-9\]" } } */
+
+double foo (float);
+
+double
+f1 (void)
+{
+  return foo (1.0);
+}
+
+double
+f2 (void)
+{
+  return foo (0.0);
+}
+
+void
+f3 (float *x, float t)
+{
+  *x = 0.0 + t;
+}
+
+float
+f4 (void)
+{
+  return 1.0;
+}