-- v5: vkd3d-shader/hlsl: Ignore "unroll" attribute for loops.
From: Nikolay Sivov nsivov@codeweavers.com
--- libs/vkd3d-shader/hlsl.c | 6 ++-- libs/vkd3d-shader/hlsl.h | 2 +- libs/vkd3d-shader/hlsl.y | 70 ++++++++++++++++++++++++++++++++------ tests/hlsl-for.shader_test | 26 +++++++++++++- 4 files changed, 89 insertions(+), 15 deletions(-)
diff --git a/libs/vkd3d-shader/hlsl.c b/libs/vkd3d-shader/hlsl.c index 54f3292b..7046404f 100644 --- a/libs/vkd3d-shader/hlsl.c +++ b/libs/vkd3d-shader/hlsl.c @@ -1291,13 +1291,13 @@ struct hlsl_ir_jump *hlsl_new_jump(struct hlsl_ctx *ctx, enum hlsl_ir_jump_type return jump; }
-struct hlsl_ir_loop *hlsl_new_loop(struct hlsl_ctx *ctx, struct vkd3d_shader_location loc) +struct hlsl_ir_loop *hlsl_new_loop(struct hlsl_ctx *ctx, const struct vkd3d_shader_location *loc) { struct hlsl_ir_loop *loop;
if (!(loop = hlsl_alloc(ctx, sizeof(*loop)))) return NULL; - init_node(&loop->node, HLSL_IR_LOOP, NULL, &loc); + init_node(&loop->node, HLSL_IR_LOOP, NULL, loc); hlsl_block_init(&loop->body); return loop; } @@ -1456,7 +1456,7 @@ static struct hlsl_ir_node *clone_loop(struct hlsl_ctx *ctx, struct clone_instr_ { struct hlsl_ir_loop *dst;
- if (!(dst = hlsl_new_loop(ctx, src->node.loc))) + if (!(dst = hlsl_new_loop(ctx, &src->node.loc))) return NULL; if (!clone_block(ctx, &dst->body, &src->body, map)) { diff --git a/libs/vkd3d-shader/hlsl.h b/libs/vkd3d-shader/hlsl.h index 3e631dd9..271b1c84 100644 --- a/libs/vkd3d-shader/hlsl.h +++ b/libs/vkd3d-shader/hlsl.h @@ -1072,7 +1072,7 @@ struct hlsl_ir_store *hlsl_new_store_index(struct hlsl_ctx *ctx, const struct hl struct hlsl_ir_store *hlsl_new_store_component(struct hlsl_ctx *ctx, struct hlsl_block *block, const struct hlsl_deref *lhs, unsigned int comp, struct hlsl_ir_node *rhs);
-struct hlsl_ir_loop *hlsl_new_loop(struct hlsl_ctx *ctx, struct vkd3d_shader_location loc); +struct hlsl_ir_loop *hlsl_new_loop(struct hlsl_ctx *ctx, const struct vkd3d_shader_location *loc); struct hlsl_ir_resource_load *hlsl_new_resource_load(struct hlsl_ctx *ctx, const struct hlsl_resource_load_params *params, const struct vkd3d_shader_location *loc); struct hlsl_ir_resource_store *hlsl_new_resource_store(struct hlsl_ctx *ctx, const struct hlsl_deref *resource, diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y index 3873a939..c5735e5f 100644 --- a/libs/vkd3d-shader/hlsl.y +++ b/libs/vkd3d-shader/hlsl.y @@ -436,12 +436,53 @@ enum loop_type LOOP_DO_WHILE };
-static struct list *create_loop(struct hlsl_ctx *ctx, enum loop_type type, struct list *init, struct list *cond, - struct list *iter, struct list *body, struct vkd3d_shader_location loc) +static bool attribute_list_has_duplicates(const struct parse_attribute_list *attrs) +{ + unsigned int i, j; + + for (i = 0; i < attrs->count; ++i) + { + for (j = i + 1; j < attrs->count; ++j) + { + if (!strcmp(attrs->attrs[i]->name, attrs->attrs[j]->name)) + return true; + } + } + + return false; +} + +static struct list *create_loop(struct hlsl_ctx *ctx, enum loop_type type, const struct parse_attribute_list *attributes, + struct list *init, struct list *cond, struct list *iter, struct list *body, const struct vkd3d_shader_location *loc) { struct list *list = NULL; struct hlsl_ir_loop *loop = NULL; struct hlsl_ir_if *cond_jump = NULL; + unsigned int i; + + if (attribute_list_has_duplicates(attributes)) + hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_INVALID_SYNTAX, "Found duplicate attribute."); + + /* Ignore unroll(0) attribute, and any invalid attribute. */ + for (i = 0; i < attributes->count; ++i) + { + const struct hlsl_attribute *attr = attributes->attrs[i]; + if (!strcmp(attr->name, "unroll")) + { + if (attr->args_count) + { + hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_NOT_IMPLEMENTED, "Unroll attribute with iteration count."); + } + else + { + FIXME("Loop unrolling is not implemented.\n"); + } + } + else + { + hlsl_warning(ctx, loc, VKD3D_SHADER_ERROR_HLSL_NOT_IMPLEMENTED, "Unrecognized attribute %s.", attr->name); + } + }
if (!(list = make_empty_list(ctx))) goto oom; @@ -4033,6 +4074,7 @@ static void validate_texture_format_type(struct hlsl_ctx *ctx, struct hlsl_type %type <attr> attribute
%type <attr_list> attribute_list +%type <attr_list> attribute_list_optional
%type <boolval> boolean
@@ -4327,6 +4369,14 @@ attribute_list: $$.attrs[$$.count++] = $2; }
+attribute_list_optional: + %empty + { + $$.count = 0; + $$.attrs = NULL; + } + | attribute_list + func_declaration: func_prototype compound_statement { @@ -5294,22 +5344,22 @@ if_body: }
loop_statement: - KW_WHILE '(' expr ')' statement + attribute_list_optional KW_WHILE '(' expr ')' statement { - $$ = create_loop(ctx, LOOP_WHILE, NULL, $3, NULL, $5, @1); + $$ = create_loop(ctx, LOOP_WHILE, &$1, NULL, $4, NULL, $6, &@1); } - | KW_DO statement KW_WHILE '(' expr ')' ';' + | attribute_list_optional KW_DO statement KW_WHILE '(' expr ')' ';' { - $$ = create_loop(ctx, LOOP_DO_WHILE, NULL, $5, NULL, $2, @1); + $$ = create_loop(ctx, LOOP_DO_WHILE, &$1, NULL, $6, NULL, $3, &@1); } - | KW_FOR '(' scope_start expr_statement expr_statement expr_optional ')' statement + | attribute_list_optional KW_FOR '(' scope_start expr_statement expr_statement expr_optional ')' statement { - $$ = create_loop(ctx, LOOP_FOR, $4, $5, $6, $8, @1); + $$ = create_loop(ctx, LOOP_FOR, &$1, $5, $6, $7, $9, &@1); hlsl_pop_scope(ctx); } - | KW_FOR '(' scope_start declaration expr_statement expr_optional ')' statement + | attribute_list_optional KW_FOR '(' scope_start declaration expr_statement expr_optional ')' statement { - $$ = create_loop(ctx, LOOP_FOR, $4, $5, $6, $8, @1); + $$ = create_loop(ctx, LOOP_FOR, &$1, $5, $6, $7, $9, &@1); hlsl_pop_scope(ctx); }
diff --git a/tests/hlsl-for.shader_test b/tests/hlsl-for.shader_test index ae7146c9..e0fdaa47 100644 --- a/tests/hlsl-for.shader_test +++ b/tests/hlsl-for.shader_test @@ -9,7 +9,7 @@ float4 main(float tex : texcoord) : sv_target { int i; float x = 0.0; - for (i = 0; i < 10; i++) + [unroll] for (i = 0; i < 10; i++) { x += i; if (tex > 0.5 && i == 5) @@ -26,3 +26,27 @@ todo draw quad probe ( 0, 0, 159, 480) rgba (10.0, 35.0, 0.0, 0.0) probe (161, 0, 479, 480) rgba (10.0, 38.0, 0.0, 0.0) probe (481, 0, 640, 480) rgba ( 5.0, 10.0, 0.0, 0.0) + +[pixel shader] +float4 main(float tex : texcoord) : sv_target +{ + int i; + float x = 0.0; + [unroll] [attr1] for (i = 0; i < 10; i++) + { + x += i; + } + return float4(i, x, 0.0, 0.0); +} + +[pixel shader fail] +float4 main(float tex : texcoord) : sv_target +{ + int i; + float x = 0.0; + [unroll] [unroll] for (i = 0; i < 10; i++) + { + x += i; + } + return float4(i, x, 0.0, 0.0); +}
On Wed Apr 12 17:31:50 2023 +0000, Matteo Bruni wrote:
Yeah I'm not worried of that, a FIXME() or a WARN() for that particular case is more than enough, just to leave something in the logs. Agreed that an hlsl_warning() on unknown attributes would be also nice and also match the one from hlsl_emit_bytecode().
Ok, I changed that.
On Wed Apr 12 17:40:14 2023 +0000, Nikolay Sivov wrote:
Ok, I changed that.
I am not completely sure I agree with error reporting in v5. IMHO: * on `unroll(X)` we should `hlsl_fixme()`, because ignoring the attribute might change the semantics significantly. Notice that `hlsl_fixme()` also sets `ctx->result`, so it essentially acts as `hlsl_error()`, but specifically marks that the error is on us, not on the caller. * on `unroll` it is sensible to `FIXME()`, because hopefully that shouldn't change the semantics too much. * on other attributes, we should `hlsl_fixme()`, because (AFAIU) there is at least an attribute that could change the semantics if ignored (e.g., `allow_uav_condition`). We could `hlsl_warning()` for the attributes we already consider relatively safe to ignore.
However, I don't want to enter a review fight, so if Matteo or Zeb have different views I yield.
This merge request was approved by Giovanni Mascellani.
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Giovanni Mascellani (＠giomasce) -
Nikolay Sivov
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Nikolay Sivov (＠nsivov)