vkd3d-shader/hlsl: Parse string default values.

Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/988

libs/vkd3d-shader/d3dbc.c

@@ -1830,17 +1830,17 @@ void write_sm1_uniforms(struct hlsl_ctx *ctx, struct vkd3d_bytecode_buffer *buff
                                 break;
 
                             case HLSL_TYPE_INT:
-                                uni.f = var->default_values[k].value.i;
+                                uni.f = var->default_values[k].number.i;
                                 break;
 
                             case HLSL_TYPE_UINT:
                             case HLSL_TYPE_BOOL:
-                                uni.f = var->default_values[k].value.u;
+                                uni.f = var->default_values[k].number.u;
                                 break;
 
                             case HLSL_TYPE_HALF:
                             case HLSL_TYPE_FLOAT:
-                                uni.u = var->default_values[k].value.u;
+                                uni.u = var->default_values[k].number.u;
                                 break;
 
                             default:

libs/vkd3d-shader/fx.c

@@ -1243,7 +1243,7 @@ static uint32_t write_fx_4_default_value(struct hlsl_type *value_type, struct hl
 
                         for (j = 0; j < comp_count; ++j)
                         {
-                            put_u32_unaligned(buffer, value->value.u);
+                            put_u32_unaligned(buffer, value->number.u);
                             value++;
                         }
                         break;

libs/vkd3d-shader/hlsl.c

@@ -167,7 +167,14 @@ void hlsl_free_var(struct hlsl_ir_var *decl)
     for (k = 0; k <= HLSL_REGSET_LAST_OBJECT; ++k)
         vkd3d_free((void *)decl->objects_usage[k]);
 
+    if (decl->default_values)
+    {
+        unsigned int component_count = hlsl_type_component_count(decl->data_type);
+
+        for (k = 0; k < component_count; ++k)
+            vkd3d_free((void *)decl->default_values[k].string);
         vkd3d_free(decl->default_values);
+    }
 
     for (i = 0; i < decl->state_block_count; ++i)
         hlsl_free_state_block(decl->state_blocks[i]);
@@ -3280,9 +3287,15 @@ void hlsl_dump_var_default_values(const struct hlsl_ir_var *var)
     vkd3d_string_buffer_printf(&buffer, "var \"%s\" default values:", var->name);
     for (k = 0; k < component_count; ++k)
     {
-        if (k % 4 == 0)
+        bool is_string = var->default_values[k].string;
+
+        if (k % 4 == 0 || is_string)
             vkd3d_string_buffer_printf(&buffer, "\n   ");
-        vkd3d_string_buffer_printf(&buffer, " 0x%08x", var->default_values[k].value.u);
+
+        if (is_string)
+            vkd3d_string_buffer_printf(&buffer, " %s", debugstr_a(var->default_values[k].string));
+        else
+            vkd3d_string_buffer_printf(&buffer, " 0x%08x", var->default_values[k].number.u);
     }
     vkd3d_string_buffer_printf(&buffer, "\n");
 

libs/vkd3d-shader/hlsl.h

@@ -456,8 +456,10 @@ struct hlsl_ir_var
      * This pointer is NULL for others. */
     struct hlsl_default_value
     {
+        /* Default value, in case the component is a string, othewise it is NULL. */
+        const char *string;
         /* Default value, in case the component is a numeric value. */
-        union hlsl_constant_value_component value;
+        union hlsl_constant_value_component number;
     } *default_values;
 
     /* A dynamic array containing the state block on the variable's declaration, if any.

libs/vkd3d-shader/hlsl.y

@@ -598,11 +598,10 @@ static void check_loop_attributes(struct hlsl_ctx *ctx, const struct parse_attri
         hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_INVALID_SYNTAX, "Unroll attribute can't be used with 'fastopt' attribute.");
 }
 
-static union hlsl_constant_value_component evaluate_static_expression(struct hlsl_ctx *ctx,
+static struct hlsl_default_value evaluate_static_expression(struct hlsl_ctx *ctx,
         struct hlsl_block *block, struct hlsl_type *dst_type, const struct vkd3d_shader_location *loc)
 {
-    union hlsl_constant_value_component ret = {0};
+    struct hlsl_default_value ret = {0};
-    struct hlsl_ir_constant *constant;
     struct hlsl_ir_node *node;
     struct hlsl_block expr;
     struct hlsl_src src;
@@ -654,8 +653,16 @@ static union hlsl_constant_value_component evaluate_static_expression(struct hls
 
     if (node->type == HLSL_IR_CONSTANT)
     {
-        constant = hlsl_ir_constant(node);
+        struct hlsl_ir_constant *constant = hlsl_ir_constant(node);
-        ret = constant->value.u[0];
+
+        ret.number = constant->value.u[0];
+    }
+    else if (node->type == HLSL_IR_STRING_CONSTANT)
+    {
+        struct hlsl_ir_string_constant *string = hlsl_ir_string_constant(node);
+
+        if (!(ret.string = vkd3d_strdup(string->string)))
+            return ret;
     }
     else if (node->type == HLSL_IR_STRING_CONSTANT)
     {
@@ -675,10 +682,11 @@ static union hlsl_constant_value_component evaluate_static_expression(struct hls
 static unsigned int evaluate_static_expression_as_uint(struct hlsl_ctx *ctx, struct hlsl_block *block,
         const struct vkd3d_shader_location *loc)
 {
-    union hlsl_constant_value_component res;
+    struct hlsl_default_value res;
 
     res = evaluate_static_expression(ctx, block, hlsl_get_scalar_type(ctx, HLSL_TYPE_UINT), loc);
-    return res.u;
+    VKD3D_ASSERT(!res.string);
+    return res.number.u;
 }
 
 static struct hlsl_block *create_loop(struct hlsl_ctx *ctx, enum loop_type type,
@@ -2373,7 +2381,7 @@ static void initialize_var_components(struct hlsl_ctx *ctx, struct hlsl_block *i
 
             if (!hlsl_clone_block(ctx, &block, instrs))
                 return;
-            default_value.value = evaluate_static_expression(ctx, &block, dst_comp_type, &src->loc);
+            default_value = evaluate_static_expression(ctx, &block, dst_comp_type, &src->loc);
 
             if (dst->is_param)
                 dst_index = *store_index;
@@ -2931,7 +2939,9 @@ static bool add_user_call(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *fu
             struct hlsl_ir_node *comp;
             struct hlsl_block store_block;
 
-            value.u[0] = param->default_values[j].value;
+            if (!param->default_values[j].string)
+            {
+                value.u[0] = param->default_values[j].number;
                 if (!(comp = hlsl_new_constant(ctx, type, &value, loc)))
                     return false;
                 hlsl_block_add_instr(args->instrs, comp);
@@ -2941,6 +2951,7 @@ static bool add_user_call(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *fu
                 hlsl_block_add_block(args->instrs, &store_block);
             }
         }
+    }
 
     if (!(call = hlsl_new_call(ctx, func, loc)))
         return false;

libs/vkd3d-shader/tpf.c

@@ -3607,7 +3607,7 @@ static void write_sm4_rdef(struct hlsl_ctx *ctx, struct dxbc_writer *dxbc)
                                 hlsl_fixme(ctx, &var->loc, "Write double default values.");
 
                             set_u32(&buffer, default_value_offset + comp_offset * sizeof(uint32_t),
-                                    var->default_values[k].value.u);
+                                    var->default_values[k].number.u);
                         }
                     }
                 }

tests/hlsl/strings.shader_test

@@ -63,7 +63,7 @@ float4 main() : sv_target
     return apple.a;
 }
 
-[pixel shader fail todo]
+[pixel shader fail]
 struct apple
 {
     float a;
@@ -75,13 +75,13 @@ float4 main(struct apple ap = {1, "foobar"}) : sv_target
     return ap.a;
 }
 
-[pixel shader fail todo]
+[pixel shader fail]
 float4 main(string s = "foobar") : sv_target
 {
     return 0;
 }
 
-[pixel shader fail(sm>=6) todo]
+[pixel shader fail(sm>=6)]
 string strs[2] = {"foo", "bar"};
 
 float4 main() : sv_target { return 0; }
@@ -95,7 +95,7 @@ float4 main() : sv_target { return 0; }
 
 % Escape sequences are hanlded differently in DXC.
 % Octal, hexadecimal, and unicode escape sequences that are out of range are considered errors.
-[pixel shader todo fail(sm>=6)]
+[pixel shader fail(sm>=6)]
 string a = "\nAAA\tBBB\rCCC\fDDD\vEEE\sFFF";
 string b = "\\AAA\"BBB\'CCC\?DDD\aEEE\bFFF\sGGG";
 string c = "\52 AAA\052 BBB\0521 CCC\52a DDD\241 EEE\441 FFF\02 GGG\0 HHH";