[PATCH v2 2/3] vkd3d-shader: Check loop [unroll] attribute for conflict with other attributes.

[Nikolay Sivov]

From: Nikolay Sivov

Signed-off-by: Nikolay Sivov 
---
 libs/vkd3d-shader/hlsl.y    | 24 ++++++++++++++++++++++++
 tests/hlsl/loop.shader_test |  8 ++++----
 2 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 5fd140fb8..9a1be71e5 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -514,6 +514,28 @@ static void resolve_loop_continue(struct hlsl_ctx *ctx, struct hlsl_block *block
     }
 }

+static void check_loop_attributes(struct hlsl_ctx *ctx, const struct parse_attribute_list *attributes,
+        const struct vkd3d_shader_location *loc)
+{
+    bool has_unroll = false, has_loop = false, has_fastopt = false;
+    unsigned int i;
+
+    for (i = 0; i < attributes->count; ++i)
+    {
+        const char *name = attributes->attrs[i]->name;
+
+        has_loop |= !strcmp(name, "loop");
+        has_unroll |= !strcmp(name, "unroll");
+        has_fastopt |= !strcmp(name, "fastopt");
+    }
+
+    if (has_unroll && has_loop)
+        hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_INVALID_SYNTAX, "Unroll attribute can't be used with 'loop' attribute.");
+
+    if (has_unroll && has_fastopt)
+        hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_INVALID_SYNTAX, "Unroll attribute can't be used with 'fastopt' attribute.");
+}
+
 static struct hlsl_block *create_loop(struct hlsl_ctx *ctx, enum loop_type type,
         const struct parse_attribute_list *attributes, struct hlsl_block *init, struct hlsl_block *cond,
         struct hlsl_block *iter, struct hlsl_block *body, const struct vkd3d_shader_location *loc)
@@ -524,6 +546,8 @@ static struct hlsl_block *create_loop(struct hlsl_ctx *ctx, enum loop_type type,
     if (attribute_list_has_duplicates(attributes))
         hlsl_error(ctx, loc, VKD3D_SHADER_ERROR_HLSL_INVALID_SYNTAX, "Found duplicate attribute.");

+    check_loop_attributes(ctx, attributes, loc);
+
     /* Ignore unroll(0) attribute, and any invalid attribute. */
     for (i = 0; i < attributes->count; ++i)
     {
diff --git a/tests/hlsl/loop.shader_test b/tests/hlsl/loop.shader_test
index 3d515c9d5..6a5240a73 100644
--- a/tests/hlsl/loop.shader_test
+++ b/tests/hlsl/loop.shader_test
@@ -158,7 +158,7 @@ todo draw quad
 probe all rgba (10.0, 10.0, 10.0, 10.0)

% unroll can't be used with fastopt or loop
-[pixel shader fail todo]
+[pixel shader fail]
 float4 main() : sv_target
 {
     float ret = 0.0;
@@ -171,7 +171,7 @@ float4 main() : sv_target
     return ret;
 }

-[pixel shader fail todo]
+[pixel shader fail]
 float4 main() : sv_target
 {
     float ret = 0.0;
@@ -184,7 +184,7 @@ float4 main() : sv_target
     return ret;
 }

-[pixel shader fail todo]
+[pixel shader fail]
 float4 main() : sv_target
 {
     float ret = 0.0;
@@ -199,7 +199,7 @@ float4 main() : sv_target
     return ret;
 }

-[pixel shader fail todo]
+[pixel shader fail]
 float4 main() : sv_target
 {
     float ret = 0.0;