[PATCH] tcg: Introduce tcg_remove_ops_after

[Richard Henderson <richard.henderson@linaro.org>]

Introduce a function to remove everything emitted
since a given point.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/tcg/tcg.h |  1 +
 tcg/tcg.c         | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/include/tcg/tcg.h b/include/tcg/tcg.h
index 74cb345308..6895246fab 100644
--- a/include/tcg/tcg.h
+++ b/include/tcg/tcg.h
@@ -1081,6 +1081,7 @@ TCGOp *tcg_emit_op(TCGOpcode opc);
 void tcg_op_remove(TCGContext *s, TCGOp *op);
 TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc);
 TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc);
+void tcg_remove_ops_after(TCGOp *op);
 
 void tcg_optimize(TCGContext *s);
 
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 0dc271aac9..262dbba1fd 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -2649,6 +2649,19 @@ void tcg_op_remove(TCGContext *s, TCGOp *op)
 #endif
 }
 
+void tcg_remove_ops_after(TCGOp *op)
+{
+    TCGContext *s = tcg_ctx;
+
+    while (true) {
+        TCGOp *last = tcg_last_op();
+        if (last == op) {
+            return;
+        }
+        tcg_op_remove(s, last);
+    }
+}
+
 static TCGOp *tcg_op_alloc(TCGOpcode opc)
 {
     TCGContext *s = tcg_ctx;
-- 
2.25.1