sqrt.c: New test.

	* gcc.target/alpha/sqrt.c: New test.

From-SVN: r254289

gcc/testsuite/ChangeLog

+2017-11-01  Uros Bizjak  <ubizjak@gmail.com>
+
+	* gcc.target/alpha/sqrt.c: New test.
+
 2017-10-31  Daniel Santos  <daniel.santos@pobox.com>
 
-	gcc.target/i386/pr82002-1.c: New test.
-	gcc.target/i386/pr82002-2a.c: New xfail test.
-	gcc.target/i386/pr82002-2b.c: New xfail test.
+	* gcc.target/i386/pr82002-1.c: New test.
+	* gcc.target/i386/pr82002-2a.c: New xfail test.
+	* gcc.target/i386/pr82002-2b.c: New xfail test.
 
 2017-10-31  Martin Jambor  <mjambor@suse.cz>
 
@@ -16,8 +20,7 @@
 
 2017-10-31  David Malcolm  <dmalcolm@redhat.com>
 
-	* g++.dg/cpp0x/auto21.C: Update dg-error to reflect addition of
-	quotes.
+	* g++.dg/cpp0x/auto21.C: Update dg-error to reflect addition of quotes.
 	* g++.dg/cpp0x/missing-initializer_list-include.C: Likewise.
 
 2017-10-31  David Malcolm  <dmalcolm@redhat.com>
@@ -35,8 +38,7 @@
 2017-10-31  Martin Liska  <mliska@suse.cz>
 
 	* g++.dg/gcov/ternary.C: New test.
-	* g++.dg/gcov/gcov-threads-1.C (main): Update expected line
-	count.
+	* g++.dg/gcov/gcov-threads-1.C (main): Update expected line count.
 	* lib/gcov.exp: Support new format for intermediate file format.
 
 2017-11-01  Julia Koval  <julia.koval@intel.com>

gcc/testsuite/gcc.target/alpha/sqrt.c

+/* glibc bug, https://sourceware.org/ml/libc-alpha/2017-04/msg00256.html
+   When using software completions, we have to prevent assembler to match
+   input and output operands of sqrtt/sqrtf insn.  Fixed in glibc 2.26.  */
+/* { dg-do run } */
+/* { dg-options "-O2 -fno-builtin-sqrt -mieee" } */
+
+double sqrt (double);
+
+static double
+float64frombits (unsigned long b)
+{
+  union { unsigned long __b; double __d; } u = { .__b = b };
+  return u.__d;
+}
+
+int
+main (void)
+{
+  double a = float64frombits (2);
+
+  if (sqrt (a) != 3.1434555694052576e-162)
+    __builtin_abort ();
+
+  return 0;
+}