Feature/initialize list side branch (#6058)

* SP004: implement initialize list translation to ctor

- We synthesize a member-wise constructor for each struct follow
   the rules described in SP004.
- Add logic to translate the initialize list to constructor invoke
- Add cuda-host decoration for the synthesized constructor
- Remove the default constructor when we have a valid member init constructor
- Disable -zero-initialize option, will re-implement it in followup (#6109).
- Fix the overload lookup issue
    When creating invoke expression for ctor, we need to call
    ResolveInvoke() to find us the best candidates, however
    the existing lookup logic could find us the base constructor
    for child struct, we should eliminate this case by providing
    the LookupOptions::IgnoreInheritance to lookup, this requires
    us to create a subcontext on SemanticsVisitor to indicate that
    we only want to use this option on looking the constructor.
- Do not implicit initialize a struct that doesn't have explicit default
   constructor.

Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com>

1 files changed, 22 insertions, 12 deletions

diff --git a/tests/pipeline/rasterization/mesh/hlsl-syntax.slang.glsl b/tests/pipeline/rasterization/mesh/hlsl-syntax.slang.glsl
index 01e29f879..0d7a201ef 100644
--- a/tests/pipeline/rasterization/mesh/hlsl-syntax.slang.glsl
+++ b/tests/pipeline/rasterization/mesh/hlsl-syntax.slang.glsl
@@ -2,27 +2,40 @@
 #extension GL_EXT_mesh_shader : require
 layout(row_major) uniform;
 layout(row_major) buffer;
-const vec3  colors_0[3] = { vec3(1.0, 1.0, 0.0), vec3(0.0, 1.0, 1.0), vec3(1.0, 0.0, 1.0) };
-const vec2  positions_0[3] = { vec2(0.0, -0.5), vec2(0.5, 0.5), vec2(-0.5, 0.5) };
-layout(location = 0)
-out vec3  verts_color_0[3];
 
 out gl_MeshPerVertexEXT
 {
     vec4 gl_Position;
 } gl_MeshVerticesEXT[3];
 
+const vec3  colors_0[3] = { vec3(1.0, 1.0, 0.0), vec3(0.0, 1.0, 1.0), vec3(1.0, 0.0, 1.0) };
+const vec2  positions_0[3] = { vec2(0.0, -0.5), vec2(0.5, 0.5), vec2(-0.5, 0.5) };
+
+struct Vertex_0
+{
+    vec4 pos_0;
+    vec3 color_0;
+};
+
+Vertex_0 Vertex_x24init_0(vec4 pos_1, vec3 color_1)
+{
+    Vertex_0 _S1;
+
+    _S1.pos_0 = pos_1;
+    _S1.color_0 = color_1;
+    return _S1;
+}
 
+layout(location = 0)
+out vec3  verts_color_0[3];
 out uvec3  gl_PrimitiveTriangleIndicesEXT[1];
 void foo_0(uint _S2)
 {
     if(_S2 < 3U)
     {
-        gl_MeshVerticesEXT[_S2].gl_Position = vec4(positions_0[_S2], 0.0, 1.0);
-        verts_color_0[_S2] = colors_0[_S2];
-    }
-    else
-    {
+        Vertex_0 _S3 = Vertex_x24init_0(vec4(positions_0[_S2], 0.0, 1.0), colors_0[_S2]);
+        gl_MeshVerticesEXT[_S2].gl_Position = _S3.pos_0;
+        verts_color_0[_S2] = _S3.color_0;
     }
     return;
 }
@@ -39,8 +52,5 @@ void main()
     {
         gl_PrimitiveTriangleIndicesEXT[gl_LocalInvocationIndex] = uvec3(0U, 1U, 2U);
     }
-    else
-    {
-    }
     return;
 }