S/390: Fix __builtin_tbeginc signature

The builtin was accidentally defined to have an integer return value.
Fixed with the attached patch.

gcc/ChangeLog:

2018-06-05  Andreas Krebbel  <krebbel@linux.ibm.com>

	* config/s390/s390-builtin-types.def: Add void function type.
	* config/s390/s390-builtins.def: Use the function type for the
	tbeginc builtin.

gcc/testsuite/ChangeLog:

2018-06-05  Andreas Krebbel  <krebbel@linux.ibm.com>

	* gcc.target/s390/htm-builtins-compile-4.c: New test.

From-SVN: r261183

gcc/ChangeLog

+2018-06-05  Andreas Krebbel  <krebbel@linux.ibm.com>
+
+	* config/s390/s390-builtin-types.def: Add void function type.
+	* config/s390/s390-builtins.def: Use the function type for the
+	tbeginc builtin.
+
 2018-06-04  Jim Wilson  <jimw@sifive.com>
 
 	* config/riscv/riscv-protos.h (riscv_expand_epilogue): Change bool arg

gcc/config/s390/s390-builtin-types.def

@@ -124,6 +124,7 @@ DEF_OPAQUE_VECTOR_TYPE (BT_BV8HI, BT_BSHORT, 8)
 DEF_OPAQUE_VECTOR_TYPE (BT_OV2DI, BT_LONGLONG, 2)
 DEF_FN_TYPE_0 (BT_FN_INT, BT_INT)
 DEF_FN_TYPE_0 (BT_FN_UINT, BT_UINT)
+DEF_FN_TYPE_0 (BT_FN_VOID, BT_VOID)
 DEF_FN_TYPE_1 (BT_FN_INT_INT, BT_INT, BT_INT)
 DEF_FN_TYPE_1 (BT_FN_INT_VOIDPTR, BT_INT, BT_VOIDPTR)
 DEF_FN_TYPE_1 (BT_FN_OV4SI_INT, BT_OV4SI, BT_INT)

gcc/config/s390/s390-builtins.def

@@ -294,7 +294,7 @@
    flags: Flags applying to all its variants should be mentioned in the OB_DEF line instead.  */
 
 
-B_DEF      (tbeginc,                    tbeginc,            0,                  B_HTM,              0,                  BT_FN_INT)
+B_DEF      (tbeginc,                    tbeginc,            0,                  B_HTM,              0,                  BT_FN_VOID)
 B_DEF      (tbegin,                     tbegin,             returns_twice_attr, B_HTM,              0,                  BT_FN_INT_VOIDPTR)
 B_DEF      (tbegin_nofloat,             tbegin_nofloat,     returns_twice_attr, B_HTM,              0,                  BT_FN_INT_VOIDPTR)
 B_DEF      (tbegin_retry,               tbegin_retry,       returns_twice_attr, B_HTM,              0,                  BT_FN_INT_VOIDPTR_INT)

gcc/testsuite/ChangeLog

+2018-06-05  Andreas Krebbel  <krebbel@linux.ibm.com>
+
+	* gcc.target/s390/htm-builtins-compile-4.c: New test.
+
 2018-06-04  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc.dg/store_merging_21.c: New test.

gcc/testsuite/gcc.target/s390/htm-builtins-compile-4.c

+/* { dg-do compile } */
+/* { dg-options "-O3 -march=zEC12 -mzarch" } */
+
+/* A bug in the builtin definition made__builtin_tbeginc to have an
+   integer return argument.  */
+void
+must_not_compile1 (void)
+{
+  int rc = __builtin_tbeginc (); /* { dg-error "void value not ignored as it ought to be" } */
+}