tcg: Add tcg-be-null.h

This is a no-op backend data implementation, for those targets that
are not currently using the load/store optimization path.

This is prepatory to always requiring these functions in all backends.

Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 43 insertions, 0 deletions

diff --git a/tcg/tcg-be-null.h b/tcg/tcg-be-null.h
new file mode 100644
index 0000000000..74c57d5a6c
--- /dev/null
+++ b/tcg/tcg-be-null.h
@@ -0,0 +1,43 @@
+/*
+ * TCG Backend Data: No backend data
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+typedef struct TCGBackendData {
+    /* Empty */
+    char dummy;
+} TCGBackendData;
+
+
+/*
+ * Initialize TB backend data at the beginning of the TB.
+ */
+
+static inline void tcg_out_tb_init(TCGContext *s)
+{
+}
+
+/*
+ * Generate TB finalization at the end of block
+ */
+
+static inline void tcg_out_tb_finalize(TCGContext *s)
+{
+}