[PATCH 2/6] vkd3d-shader/hlsl: Store function parameters in an array.

[Zebediah Figura]

From: Zebediah Figura

---
 libs/vkd3d-shader/hlsl.c         | 50 ++++++++++++--------------
 libs/vkd3d-shader/hlsl.h         | 19 ++++++----
 libs/vkd3d-shader/hlsl.y         | 62 +++++++++++++++++---------------
 libs/vkd3d-shader/hlsl_codegen.c |  4 ++-
 4 files changed, 70 insertions(+), 65 deletions(-)

diff --git a/libs/vkd3d-shader/hlsl.c b/libs/vkd3d-shader/hlsl.c
index 256e466a..f62057b8 100644
--- a/libs/vkd3d-shader/hlsl.c
+++ b/libs/vkd3d-shader/hlsl.c
@@ -1200,8 +1200,9 @@ struct hlsl_ir_loop *hlsl_new_loop(struct hlsl_ctx *ctx, struct vkd3d_shader_loc
     return loop;
 }

-struct hlsl_ir_function_decl *hlsl_new_func_decl(struct hlsl_ctx *ctx, struct hlsl_type *return_type,
-        struct list *parameters, const struct hlsl_semantic *semantic, const struct vkd3d_shader_location *loc)
+struct hlsl_ir_function_decl *hlsl_new_func_decl(struct hlsl_ctx *ctx,
+        struct hlsl_type *return_type, const struct hlsl_func_parameters *parameters,
+        const struct hlsl_semantic *semantic, const struct vkd3d_shader_location *loc)
 {
     struct hlsl_ir_function_decl *decl;

@@ -1209,7 +1210,7 @@ struct hlsl_ir_function_decl *hlsl_new_func_decl(struct hlsl_ctx *ctx, struct hl
         return NULL;
     list_init(&decl->body.instrs);
     decl->return_type = return_type;
-    decl->parameters = parameters;
+    decl->parameters = *parameters;
     decl->loc = *loc;

if (!hlsl_types_are_equal(return_type, ctx->builtin_types.Void))
@@ -1336,27 +1337,18 @@ static int compare_param_hlsl_types(const struct hlsl_type *t1, const struct hls

static int compare_function_decl_rb(const void *key, const struct rb_entry *entry)
 {
-    const struct list *params = key;
     const struct hlsl_ir_function_decl *decl = RB_ENTRY_VALUE(entry, const struct hlsl_ir_function_decl, entry);
-    int decl_params_count = decl->parameters ? list_count(decl->parameters) : 0;
-    int params_count = params ? list_count(params) : 0;
-    struct list *p1cur, *p2cur;
+    const struct hlsl_func_parameters *parameters = key;
+    size_t i;
     int r;

-    if ((r = vkd3d_u32_compare(params_count, decl_params_count)))
+    if ((r = vkd3d_u32_compare(parameters->count, decl->parameters.count)))
         return r;

-    p1cur = params ? list_head(params) : NULL;
-    p2cur = decl->parameters ? list_head(decl->parameters) : NULL;
-    while (p1cur && p2cur)
+    for (i = 0; i < parameters->count; ++i)
     {
-        struct hlsl_ir_var *p1, *p2;
-        p1 = LIST_ENTRY(p1cur, struct hlsl_ir_var, param_entry);
-        p2 = LIST_ENTRY(p2cur, struct hlsl_ir_var, param_entry);
-        if ((r = compare_param_hlsl_types(p1->data_type, p2->data_type)))
+        if ((r = compare_param_hlsl_types(parameters->vars[i]->data_type, decl->parameters.vars[i]->data_type)))
             return r;
-        p1cur = list_next(params, p1cur);
-        p2cur = list_next(decl->parameters, p2cur);
     }
     return 0;
 }
@@ -1655,7 +1647,7 @@ static void dump_ir_call(struct hlsl_ctx *ctx, struct vkd3d_string_buffer *buffe
 {
     const struct hlsl_ir_function_decl *decl = call->decl;
     struct vkd3d_string_buffer *string;
-    const struct hlsl_ir_var *param;
+    size_t i;

if (!(string = hlsl_type_to_string(ctx, decl->return_type)))
         return;
@@ -1663,14 +1655,16 @@ static void dump_ir_call(struct hlsl_ctx *ctx, struct vkd3d_string_buffer *buffe
     vkd3d_string_buffer_printf(buffer, "call %s %s(", string->buffer, decl->func->name);
     hlsl_release_string_buffer(ctx, string);

-    LIST_FOR_EACH_ENTRY(param, decl->parameters, struct hlsl_ir_var, param_entry)
+    for (i = 0; i < decl->parameters.count; ++i)
     {
+        const struct hlsl_ir_var *param = decl->parameters.vars[i];
+
         if (!(string = hlsl_type_to_string(ctx, param->data_type)))
             return;

-        vkd3d_string_buffer_printf(buffer, "%s", string->buffer);
-        if (list_tail(decl->parameters) != &param->param_entry)
+        if (i)
             vkd3d_string_buffer_printf(buffer, ", ");
+        vkd3d_string_buffer_printf(buffer, "%s", string->buffer);

hlsl_release_string_buffer(ctx, string);
     }
@@ -1959,14 +1953,14 @@ static void dump_instr(struct hlsl_ctx *ctx, struct vkd3d_string_buffer *buffer,
 void hlsl_dump_function(struct hlsl_ctx *ctx, const struct hlsl_ir_function_decl *func)
 {
     struct vkd3d_string_buffer buffer;
-    struct hlsl_ir_var *param;
+    size_t i;

vkd3d_string_buffer_init(&buffer);
     vkd3d_string_buffer_printf(&buffer, "Dumping function %s.\n", func->func->name);
     vkd3d_string_buffer_printf(&buffer, "Function parameters:\n");
-    LIST_FOR_EACH_ENTRY(param, func->parameters, struct hlsl_ir_var, param_entry)
+    for (i = 0; i < func->parameters.count; ++i)
     {
-        dump_ir_var(ctx, &buffer, param);
+        dump_ir_var(ctx, &buffer, func->parameters.vars[i]);
         vkd3d_string_buffer_printf(&buffer, "\n");
     }
     if (func->has_body)
@@ -2168,7 +2162,7 @@ static void free_function_decl(struct hlsl_ir_function_decl *decl)
         hlsl_free_attribute((void *)decl->attrs[i]);
     vkd3d_free((void *)decl->attrs);

-    vkd3d_free(decl->parameters);
+    vkd3d_free(decl->parameters.vars);
     hlsl_free_instr_list(&decl->body.instrs);
     vkd3d_free(decl);
 }
@@ -2200,7 +2194,7 @@ void hlsl_add_function(struct hlsl_ctx *ctx, char *name, struct hlsl_ir_function
     {
         func = RB_ENTRY_VALUE(func_entry, struct hlsl_ir_function, entry);
         decl->func = func;
-        if ((old_entry = rb_get(&func->overloads, decl->parameters)))
+        if ((old_entry = rb_get(&func->overloads, &decl->parameters)))
         {
             struct hlsl_ir_function_decl *old_decl =
                     RB_ENTRY_VALUE(old_entry, struct hlsl_ir_function_decl, entry);
@@ -2224,7 +2218,7 @@ void hlsl_add_function(struct hlsl_ctx *ctx, char *name, struct hlsl_ir_function
             rb_remove(&func->overloads, old_entry);
             free_function_decl(old_decl);
         }
-        rb_put(&func->overloads, decl->parameters, &decl->entry);
+        rb_put(&func->overloads, &decl->parameters, &decl->entry);
         vkd3d_free(name);
         return;
     }
@@ -2232,7 +2226,7 @@ void hlsl_add_function(struct hlsl_ctx *ctx, char *name, struct hlsl_ir_function
     func->name = name;
     rb_init(&func->overloads, compare_function_decl_rb);
     decl->func = func;
-    rb_put(&func->overloads, decl->parameters, &decl->entry);
+    rb_put(&func->overloads, &decl->parameters, &decl->entry);
     rb_put(&ctx->functions, func->name, &func->entry);
 }

diff --git a/libs/vkd3d-shader/hlsl.h b/libs/vkd3d-shader/hlsl.h
index bb63f827..a3fd1309 100644
--- a/libs/vkd3d-shader/hlsl.h
+++ b/libs/vkd3d-shader/hlsl.h
@@ -360,8 +360,6 @@ struct hlsl_ir_var

/* Item entry in hlsl_scope.vars. Specifically hlsl_ctx.globals.vars if the variable is global. */
     struct list scope_entry;
-    /* Item entry in hlsl_ir_function_decl.parameters, if the variable is a function parameter. */
-    struct list param_entry;
     /* Item entry in hlsl_ctx.extern_vars, if the variable is extern. */
     struct list extern_entry;

@@ -392,6 +390,13 @@ struct hlsl_ir_var
     uint32_t is_param : 1;
 };

+/* Sized array of variables representing a function's parameters. */
+struct hlsl_func_parameters
+{
+    struct hlsl_ir_var **vars;
+    size_t count, capacity;
+};
+
 struct hlsl_ir_function
 {
     /* Item entry in hlsl_ctx.functions */
@@ -415,9 +420,8 @@ struct hlsl_ir_function_decl

/* Function to which this declaration corresponds. */
     struct hlsl_ir_function *func;
-    /* List containing one variable for each parameter of the function; linked by the
-     *   hlsl_ir_var.param_entry fields. */
-    struct list *parameters;
+
+    struct hlsl_func_parameters parameters;

struct hlsl_block body;
     bool has_body;
@@ -1005,8 +1009,9 @@ struct hlsl_ir_node *hlsl_new_expr(struct hlsl_ctx *ctx, enum hlsl_ir_expr_op op
         struct hlsl_type *data_type, const struct vkd3d_shader_location *loc);
 struct hlsl_ir_constant *hlsl_new_float_constant(struct hlsl_ctx *ctx,
         float f, const struct vkd3d_shader_location *loc);
-struct hlsl_ir_function_decl *hlsl_new_func_decl(struct hlsl_ctx *ctx, struct hlsl_type *return_type,
-        struct list *parameters, const struct hlsl_semantic *semantic, const struct vkd3d_shader_location *loc);
+struct hlsl_ir_function_decl *hlsl_new_func_decl(struct hlsl_ctx *ctx,
+        struct hlsl_type *return_type, const struct hlsl_func_parameters *parameters,
+        const struct hlsl_semantic *semantic, const struct vkd3d_shader_location *loc);
 struct hlsl_ir_if *hlsl_new_if(struct hlsl_ctx *ctx, struct hlsl_ir_node *condition, struct vkd3d_shader_location loc);
 struct hlsl_ir_constant *hlsl_new_int_constant(struct hlsl_ctx *ctx, int n,
         const struct vkd3d_shader_location *loc);
diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index a4de0edd..f1f6f282 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -1067,7 +1067,7 @@ static bool add_typedef(struct hlsl_ctx *ctx, DWORD modifiers, struct hlsl_type
     return true;
 }

-static bool add_func_parameter(struct hlsl_ctx *ctx, struct list *list,
+static bool add_func_parameter(struct hlsl_ctx *ctx, struct hlsl_func_parameters *parameters,
         struct parse_parameter *param, const struct vkd3d_shader_location loc)
 {
     struct hlsl_ir_var *var;
@@ -1088,7 +1088,11 @@ static bool add_func_parameter(struct hlsl_ctx *ctx, struct list *list,
         hlsl_free_var(var);
         return false;
     }
-    list_add_tail(list, &var->param_entry);
+
+    if (!hlsl_array_reserve(ctx, (void **)&parameters->vars, &parameters->capacity,
+            parameters->count + 1, sizeof(*parameters->vars)))
+        return false;
+    parameters->vars[parameters->count++] = var;
     return true;
 }

@@ -1105,7 +1109,8 @@ static struct hlsl_reg_reservation parse_reg_reservation(const char *reg_string)
     return reservation;
 }

-static const struct hlsl_ir_function_decl *get_func_decl(struct rb_tree *funcs, char *name, struct list *params)
+static const struct hlsl_ir_function_decl *get_func_decl(struct rb_tree *funcs,
+        const char *name, const struct hlsl_func_parameters *parameters)
 {
     struct hlsl_ir_function *func;
     struct rb_entry *entry;
@@ -1114,7 +1119,7 @@ static const struct hlsl_ir_function_decl *get_func_decl(struct rb_tree *funcs,
     {
         func = RB_ENTRY_VALUE(entry, struct hlsl_ir_function, entry);

-        if ((entry = rb_get(&func->overloads, params)))
+        if ((entry = rb_get(&func->overloads, parameters)))
             return RB_ENTRY_VALUE(entry, struct hlsl_ir_function_decl, entry);
     }
     return NULL;
@@ -2224,17 +2229,17 @@ static void find_function_call_exact(struct rb_entry *entry, void *context)
 {
     struct hlsl_ir_function_decl *decl = RB_ENTRY_VALUE(entry, struct hlsl_ir_function_decl, entry);
     struct find_function_call_args *args = context;
-    const struct hlsl_ir_var *param;
-    unsigned int i = 0;
+    unsigned int i;

-    LIST_FOR_EACH_ENTRY(param, decl->parameters, struct hlsl_ir_var, param_entry)
+    if (decl->parameters.count > args->params->args_count)
+        return;
+
+    for (i = 0; i < decl->parameters.count; ++i)
     {
-        if (i >= args->params->args_count
-                || !hlsl_types_are_equal(param->data_type, args->params->args[i++]->data_type))
+        if (!hlsl_types_are_equal(decl->parameters.vars[i]->data_type, args->params->args[i]->data_type))
             return;
     }
-    if (i == args->params->args_count)
-        args->decl = decl;
+    args->decl = decl;
 }

static struct hlsl_ir_function_decl *find_function_call(struct hlsl_ctx *ctx,
@@ -3000,15 +3005,14 @@ static struct list *add_call(struct hlsl_ctx *ctx, const char *name,
     if ((decl = find_function_call(ctx, name, args)))
     {
         struct hlsl_ir_node *call;
-        struct hlsl_ir_var *param;
         unsigned int i;

-        assert(args->args_count == list_count(decl->parameters));
+        assert(args->args_count == decl->parameters.count);

-        i = 0;
-        LIST_FOR_EACH_ENTRY(param, decl->parameters, struct hlsl_ir_var, param_entry)
+        for (i = 0; i < decl->parameters.count; ++i)
         {
-            struct hlsl_ir_node *arg = args->args[i++];
+            struct hlsl_ir_var *param = decl->parameters.vars[i];
+            struct hlsl_ir_node *arg = args->args[i];

if (!hlsl_types_are_equal(arg->data_type, param->data_type))
             {
@@ -3030,10 +3034,10 @@ static struct list *add_call(struct hlsl_ctx *ctx, const char *name,
             goto fail;
         list_add_tail(args->instrs, &call->entry);

-        i = 0;
-        LIST_FOR_EACH_ENTRY(param, decl->parameters, struct hlsl_ir_var, param_entry)
+        for (i = 0; i < decl->parameters.count; ++i)
         {
-            struct hlsl_ir_node *arg = args->args[i++];
+            struct hlsl_ir_var *param = decl->parameters.vars[i];
+            struct hlsl_ir_node *arg = args->args[i];

if (param->storage_modifiers & HLSL_STORAGE_OUT)
             {
@@ -3510,6 +3514,7 @@ static bool add_method_call(struct hlsl_ctx *ctx, struct list *instrs, struct hl
     struct parse_fields fields;
     struct parse_function function;
     struct parse_parameter parameter;
+    struct hlsl_func_parameters parameters;
     struct parse_initializer initializer;
     struct parse_array_sizes arrays;
     struct parse_variable_def *variable_def;
@@ -3647,8 +3652,6 @@ static bool add_method_call(struct hlsl_ctx *ctx, struct list *instrs, struct hl
 %type <list> logicor_expr
 %type <list> loop_statement
 %type <list> mul_expr
-%type <list> param_list
-%type <list> parameters
 %type <list> postfix_expr
 %type <list> primary_expr
 %type <list> relational_expr
@@ -3702,6 +3705,9 @@ static bool add_method_call(struct hlsl_ctx *ctx, struct list *instrs, struct hl

%type <parameter> parameter

+%type <parameters> param_list
+%type <parameters> parameters
+
 %type <reg_reservation> register_opt

%type <sampler_dim> texture_type uav_type
@@ -3727,7 +3733,7 @@ hlsl_prog:
         {
             const struct hlsl_ir_function_decl *decl;

-            decl = get_func_decl(&ctx->functions, $2.name, $2.decl->parameters);
+            decl = get_func_decl(&ctx->functions, $2.name, &$2.decl->parameters);
             if (decl)
             {
                 if (decl->has_body && $2.decl->has_body)
@@ -4032,7 +4038,7 @@ func_prototype_no_attrs:
             if ($7.reg_reservation.type)
                 FIXME("Unexpected register reservation for a function.\n");

-            if (!($$.decl = hlsl_new_func_decl(ctx, type, $5, &$7.semantic, &@3)))
+            if (!($$.decl = hlsl_new_func_decl(ctx, type, &$5, &$7.semantic, &@3)))
                 YYABORT;
             $$.name = $3;
             ctx->cur_function = $$.decl;
@@ -4117,8 +4123,7 @@ register_opt:
 parameters:
       scope_start
         {
-            if (!($$ = make_empty_list(ctx)))
-                YYABORT;
+            memset(&$$, 0, sizeof($$));
         }
     | scope_start param_list
         {
@@ -4128,9 +4133,8 @@ parameters:
 param_list:
       parameter
         {
-            if (!($$ = make_empty_list(ctx)))
-                YYABORT;
-            if (!add_func_parameter(ctx, $$, &$1, @1))
+            memset(&$$, 0, sizeof($$));
+            if (!add_func_parameter(ctx, &$$, &$1, @1))
             {
                 ERR("Error adding function parameter %s.\n", $1.name);
                 YYABORT;
@@ -4139,7 +4143,7 @@ param_list:
     | param_list ',' parameter
         {
             $$ = $1;
-            if (!add_func_parameter(ctx, $$, &$3, @3))
+            if (!add_func_parameter(ctx, &$$, &$3, @3))
             {
                 hlsl_error(ctx, &@3, VKD3D_SHADER_ERROR_HLSL_REDEFINED,
                         "Parameter "%s" is already declared.", $3.name);
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 4fa860a6..f6f096f1 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -2877,8 +2877,10 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry
             prepend_uniform_copy(ctx, &body->instrs, var);
     }

-    LIST_FOR_EACH_ENTRY(var, entry_func->parameters, struct hlsl_ir_var, param_entry)
+    for (i = 0; i < entry_func->parameters.count; ++i)
     {
+        var = entry_func->parameters.vars[i];
+
         if (var->data_type->type == HLSL_CLASS_OBJECT || (var->storage_modifiers & HLSL_STORAGE_UNIFORM))
         {
             prepend_uniform_copy(ctx, &body->instrs, var);