builtin-pow-mpfr-1.c: New test.

	* gcc.dg/torture/builtin-pow-mpfr-1.c: New test.

From-SVN: r120018

gcc/testsuite/ChangeLog

+2006-12-18  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* gcc.dg/torture/builtin-pow-mpfr-1.c: New test.
+
 2006-12-18  Brooks Moses  <brooks.moses@codesourcery.com>
 
 	* gfortran.dg/advance_3.f90: Add dg-do compile directive.

gcc/testsuite/gcc.dg/torture/builtin-pow-mpfr-1.c

+/* Version 2.2.0 of MPFR had bugs in pow underflow/overflow.  This
+   test checks to see if that buggy version was installed.  The
+   problem is NOT fixed with the version 2.2.0 "cumulative patch".
+   However it is fixed in version 2.2.1 and presumably later MPFR
+   versions.
+
+   Origin: Kaveh R. Ghazi 12/17/2006.  */
+
+/* { dg-do compile } */
+/* { dg-options "-fdump-tree-original" } */
+
+extern double testit()
+{
+  /* This underflows and therefore gcc should not fold it.  */
+  return __builtin_pow (0.11, 1.0e38);
+}
+
+/* { dg-final { scan-tree-dump "pow" "original" } } */
+/* { dg-final { cleanup-tree-dump "original" } } */