re PR target/79487 (Invalid _Decimal32 comparison on s390x)

	PR target/79487
	* real.c (real_from_integer): Call real_convert even for decimal.

	* gcc.dg/dfp/pr79487.c: New test.
	* c-c++-common/ubsan/float-cast-overflow-8.c (TEST): Revert
	2017-02-13 change.

From-SVN: r245477

gcc/ChangeLog

+2017-02-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/79487
+	* real.c (real_from_integer): Call real_convert even for decimal.
+
 2017-02-15  Dominik Vogt  <vogt@linux.vnet.ibm.com>
 
 	PR target/79421

gcc/real.c

@@ -2266,7 +2266,7 @@ real_from_integer (REAL_VALUE_TYPE *r, format_helper fmt,
 
   if (fmt.decimal_p ())
     decimal_from_integer (r);
-  else if (fmt)
+  if (fmt)
     real_convert (r, fmt, r);
 }
 

gcc/testsuite/ChangeLog

+2017-02-15  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/79487
+	* gcc.dg/dfp/pr79487.c: New test.
+	* c-c++-common/ubsan/float-cast-overflow-8.c (TEST): Revert
+	2017-02-13 change.
+
 2017-01-14  Carl Love  <cel@us.ibm.com>
 
 	* gcc.target/powerpc/vsx-builtin-3.c: Add missing test case for the

gcc/testsuite/c-c++-common/ubsan/float-cast-overflow-8.c

@@ -8,7 +8,7 @@
 #define TEST(type1, type2) \
   if (type1##_MIN)						\
     {								\
-      volatile type2 min = type1##_MIN;				\
+      type2 min = type1##_MIN;					\
       type2 add = -1.0;						\
       while (1)							\
 	{							\
@@ -28,7 +28,7 @@
       volatile type1 tem3 = cvt_##type1##_##type2 (-1.0f);	\
     }								\
   {								\
-    volatile type2 max = type1##_MAX;				\
+    type2 max = type1##_MAX;					\
     type2 add = 1.0;						\
     while (1)							\
       {								\

gcc/testsuite/gcc.dg/dfp/pr79487.c

+/* PR target/79487 */
+/* { dg-options "-O2" } */
+
+int
+main ()
+{
+  _Decimal32 a = (-9223372036854775807LL - 1LL); 
+  _Decimal32 b = -9.223372E+18DF;
+  if (b - a != 0.0DF)
+    __builtin_abort ();
+  _Decimal64 c = (-9223372036854775807LL - 1LL); 
+  _Decimal64 d = -9.223372036854776E+18DD;
+  if (d - c != 0.0DD)
+    __builtin_abort ();
+  return 0;
+}