Francisco Casas : vkd3d-shader/hlsl: Check for non-static object references.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 6989266e76fc670a92b68e3fa064d16706cce070
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/6989266e76fc670a92b68e3fa064d1...

Author: Francisco Casas 
Date:   Fri Jul 22 11:40:24 2022 -0400

vkd3d-shader/hlsl: Check for non-static object references.

It is responsibility of the shader's programmer to ensure that
object references can be solved statically.

Resource arrays for ps_5_1 and vs_5_1 are an exception which is not
properly handled yet. They probably deserve a different object type.

Signed-off-by: Francisco Casas

---

libs/vkd3d-shader/hlsl_codegen.c         | 47 ++++++++++++++++++++++++++++++++
 libs/vkd3d-shader/vkd3d_shader_private.h |  1 +
 tests/object-references.shader_test      |  4 +--
 3 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index 7f76fce1..6c4a0eec 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -967,6 +967,51 @@ static bool copy_propagation_execute(struct hlsl_ctx *ctx, struct hlsl_block *bl
     return progress;
 }

+static void note_non_static_deref_expressions(struct hlsl_ctx *ctx, const struct hlsl_deref *deref,
+        const char *usage)
+{
+    unsigned int i;
+
+    for (i = 0; i < deref->path_len; ++i)
+    {
+        struct hlsl_ir_node *path_node = deref->path[i].node;
+
+        assert(path_node);
+        if (path_node->type != HLSL_IR_CONSTANT)
+            hlsl_note(ctx, &path_node->loc, VKD3D_SHADER_LOG_ERROR,
+                    "Expression for %s within "%s" cannot be resolved statically.",
+                    usage, deref->var->name);
+    }
+}
+
+static bool validate_static_object_references(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr,
+        void *context)
+{
+    unsigned int start, count;
+
+    if (instr->type == HLSL_IR_RESOURCE_LOAD)
+    {
+        struct hlsl_ir_resource_load *load = hlsl_ir_resource_load(instr);
+
+        if (!hlsl_component_index_range_from_deref(ctx, &load->resource, &start, &count))
+        {
+            hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF,
+                    "Loaded resource from "%s" must be determinable at compile time.",
+                    load->resource.var->name);
+            note_non_static_deref_expressions(ctx, &load->resource, "loaded resource");
+        }
+        if (load->sampler.var && !hlsl_component_index_range_from_deref(ctx, &load->sampler, &start, &count))
+        {
+            hlsl_error(ctx, &instr->loc, VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF,
+                    "Resource load sampler from "%s" must be determinable at compile time.",
+                    load->sampler.var->name);
+            note_non_static_deref_expressions(ctx, &load->sampler, "resource load sampler");
+        }
+    }
+
+    return false;
+}
+
 static bool is_vec1(const struct hlsl_type *type)
 {
     return (type->type == HLSL_CLASS_SCALAR) || (type->type == HLSL_CLASS_VECTOR && type->dimx == 1);
@@ -2236,6 +2281,8 @@ int hlsl_emit_bytecode(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry
     if (ctx->profile->major_version < 4)
         transform_ir(ctx, lower_division, body, NULL);

+    transform_ir(ctx, validate_static_object_references, body, NULL);
+
     /* TODO: move forward, remove when no longer needed */
     transform_ir(ctx, transform_deref_paths_into_offsets, body, NULL);
     while (transform_ir(ctx, hlsl_fold_constant_exprs, body, NULL));
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index 8bde5523..aca5606b 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -118,6 +118,7 @@ enum vkd3d_shader_error
     VKD3D_SHADER_ERROR_HLSL_OFFSET_OUT_OF_BOUNDS        = 5019,
     VKD3D_SHADER_ERROR_HLSL_INCOMPATIBLE_PROFILE        = 5020,
     VKD3D_SHADER_ERROR_HLSL_DIVISION_BY_ZERO            = 5021,
+    VKD3D_SHADER_ERROR_HLSL_NON_STATIC_OBJECT_REF       = 5022,

VKD3D_SHADER_WARNING_HLSL_IMPLICIT_TRUNCATION       = 5300,
     VKD3D_SHADER_WARNING_HLSL_DIVISION_BY_ZERO          = 5301,
diff --git a/tests/object-references.shader_test b/tests/object-references.shader_test
index c3952e03..6cff351a 100644
--- a/tests/object-references.shader_test
+++ b/tests/object-references.shader_test
@@ -89,7 +89,7 @@ draw quad
 probe all rgba (2132, 2132, 2132, 1111)

-[pixel shader fail todo]
+[pixel shader fail]
 Texture2D tex[3];
 uniform int n;

@@ -109,7 +109,7 @@ float4 main() : sv_target
 }

-[pixel shader fail todo]
+[pixel shader fail]
 // Note: Only valid in shader model 5.1
 Texture2D tex[3];
 uniform int n;