tcg: Store the TCGHelperInfo in the TCGOp for call

This will give us both flags and typemask for use later.

We also fix a dumping bug, wherein calls generated for plugins
fail tcg_find_helper and print (null) instead of either a name
or the raw function pointer.

Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

tcg/tcg-internal.h

@@ -27,6 +27,13 @@
 
 #define TCG_HIGHWATER 1024
 
+typedef struct TCGHelperInfo {
+    void *func;
+    const char *name;
+    unsigned flags;
+    unsigned typemask;
+} TCGHelperInfo;
+
 extern TCGContext tcg_init_ctx;
 extern TCGContext **tcg_ctxs;
 extern unsigned int tcg_cur_ctxs;
@@ -37,9 +44,14 @@ bool tcg_region_alloc(TCGContext *s);
 void tcg_region_initial_alloc(TCGContext *s);
 void tcg_region_prologue_set(TCGContext *s);
 
+static inline const TCGHelperInfo *tcg_call_info(TCGOp *op)
+{
+    return (void *)(uintptr_t)op->args[TCGOP_CALLO(op) + TCGOP_CALLI(op) + 1];
+}
+
 static inline unsigned tcg_call_flags(TCGOp *op)
 {
-    return op->args[TCGOP_CALLO(op) + TCGOP_CALLI(op) + 1];
+    return tcg_call_info(op)->flags;
 }
 
 #endif /* TCG_INTERNAL_H */

tcg/tcg.c

@@ -532,13 +532,6 @@ void tcg_pool_reset(TCGContext *s)
     s->pool_current = NULL;
 }
 
-typedef struct TCGHelperInfo {
-    void *func;
-    const char *name;
-    unsigned flags;
-    unsigned typemask;
-} TCGHelperInfo;
-
 #include "exec/helper-proto.h"
 
 static const TCGHelperInfo all_helpers[] = {
@@ -1395,12 +1388,11 @@ bool tcg_op_supported(TCGOpcode op)
 void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
 {
     int i, real_args, nb_rets, pi;
-    unsigned typemask, flags;
+    unsigned typemask;
-    TCGHelperInfo *info;
+    const TCGHelperInfo *info;
     TCGOp *op;
 
     info = g_hash_table_lookup(helper_table, (gpointer)func);
-    flags = info->flags;
     typemask = info->typemask;
 
 #ifdef CONFIG_PLUGIN
@@ -1538,7 +1530,7 @@ void tcg_gen_callN(void *func, TCGTemp *ret, int nargs, TCGTemp **args)
         real_args++;
     }
     op->args[pi++] = (uintptr_t)func;
-    op->args[pi++] = flags;
+    op->args[pi++] = (uintptr_t)info;
     TCGOP_CALLI(op) = real_args;
 
     /* Make sure the fields didn't overflow.  */
@@ -1657,19 +1649,6 @@ static char *tcg_get_arg_str(TCGContext *s, char *buf,
     return tcg_get_arg_str_ptr(s, buf, buf_size, arg_temp(arg));
 }
 
-/* Find helper name.  */
-static inline const char *tcg_find_helper(TCGContext *s, uintptr_t val)
-{
-    const char *ret = NULL;
-    if (helper_table) {
-        TCGHelperInfo *info = g_hash_table_lookup(helper_table, (gpointer)val);
-        if (info) {
-            ret = info->name;
-        }
-    }
-    return ret;
-}
-
 static const char * const cond_name[] =
 {
     [TCG_COND_NEVER] = "never",
@@ -1760,15 +1739,29 @@ static void tcg_dump_ops(TCGContext *s, bool have_prefs)
                 col += qemu_log(" " TARGET_FMT_lx, a);
             }
         } else if (c == INDEX_op_call) {
+            const TCGHelperInfo *info = tcg_call_info(op);
+            void *func;
+
             /* variable number of arguments */
             nb_oargs = TCGOP_CALLO(op);
             nb_iargs = TCGOP_CALLI(op);
             nb_cargs = def->nb_cargs;
 
-            /* function name, flags, out args */
+            col += qemu_log(" %s ", def->name);
-            col += qemu_log(" %s %s,$0x%x,$%d", def->name,
+
-                            tcg_find_helper(s, op->args[nb_oargs + nb_iargs]),
+            /*
-                            tcg_call_flags(op), nb_oargs);
+             * Print the function name from TCGHelperInfo, if available.
+             * Note that plugins have a template function for the info,
+             * but the actual function pointer comes from the plugin.
+             */
+            func = (void *)(uintptr_t)op->args[nb_oargs + nb_iargs];
+            if (func == info->func) {
+                col += qemu_log("%s", info->name);
+            } else {
+                col += qemu_log("plugin(%p)", func);
+            }
+
+            col += qemu_log("$0x%x,$%d", info->flags, nb_oargs);
             for (i = 0; i < nb_oargs; i++) {
                 col += qemu_log(",%s", tcg_get_arg_str(s, buf, sizeof(buf),
                                                        op->args[i]));