accel/tcg/plugin: Don't search for the function pointer index

The function pointer is immediately after the output and input
operands; no need to search.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 11 insertions, 18 deletions

diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c
index 80dff68934..9e359c006a 100644
--- a/accel/tcg/plugin-gen.c
+++ b/accel/tcg/plugin-gen.c
@@ -381,32 +381,25 @@ static TCGOp *copy_st_ptr(TCGOp **begin_op, TCGOp *op)
 static TCGOp *copy_call(TCGOp **begin_op, TCGOp *op, void *empty_func,
                         void *func, int *cb_idx)
 {
+    TCGOp *old_op;
+    int func_idx;
+
     /* copy all ops until the call */
     do {
         op = copy_op_nocheck(begin_op, op);
     } while (op->opc != INDEX_op_call);
 
     /* fill in the op call */
-    op->param1 = (*begin_op)->param1;
-    op->param2 = (*begin_op)->param2;
+    old_op = *begin_op;
+    TCGOP_CALLI(op) = TCGOP_CALLI(old_op);
+    TCGOP_CALLO(op) = TCGOP_CALLO(old_op);
     tcg_debug_assert(op->life == 0);
-    if (*cb_idx == -1) {
-        int i;
 
-        /*
-         * Instead of working out the position of the callback in args[], just
-         * look for @empty_func, since it should be a unique pointer.
-         */
-        for (i = 0; i < MAX_OPC_PARAM_ARGS; i++) {
-            if ((uintptr_t)(*begin_op)->args[i] == (uintptr_t)empty_func) {
-                *cb_idx = i;
-                break;
-            }
-        }
-        tcg_debug_assert(i < MAX_OPC_PARAM_ARGS);
-    }
-    op->args[*cb_idx] = (uintptr_t)func;
-    op->args[*cb_idx + 1] = (*begin_op)->args[*cb_idx + 1];
+    func_idx = TCGOP_CALLO(op) + TCGOP_CALLI(op);
+    *cb_idx = func_idx;
+
+    op->args[func_idx] = (uintptr_t)func;
+    op->args[func_idx + 1] = old_op->args[func_idx + 1];
 
     return op;
 }