rusticl/core: Make convert_spirv_to_nir output pair (KernelInfo, NirShader)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23898>

src/gallium/frontends/rusticl/core/kernel.rs

@@ -697,7 +697,7 @@ pub(super) fn convert_spirv_to_nir(
     name: &str,
     args: &[spirv::SPIRVKernelArg],
     dev: &Device,
-) -> (NirShader, Vec<KernelArg>, Vec<InternalKernelArg>) {
+) -> (KernelInfo, NirShader) {
     let cache = dev.screen().shader_cache();
     let key = build.hash_key(dev, name);
 
@@ -710,7 +710,7 @@ pub(super) fn convert_spirv_to_nir(
         None
     };
 
-    if let Some(res) = res {
+    let (nir, args, internal_args) = if let Some(res) = res {
         res
     } else {
         let mut nir = build.to_nir(name, dev);
@@ -745,7 +745,20 @@ pub(super) fn convert_spirv_to_nir(
         }
 
         (nir, args, internal_args)
-    }
+    };
+
+    let attributes_string = build.attribute_str(name, dev);
+    let wgs = nir.workgroup_size();
+    let kernel_info = KernelInfo {
+        args: args,
+        internal_args: internal_args,
+        attributes_string: attributes_string,
+        work_group_size: [wgs[0] as usize, wgs[1] as usize, wgs[2] as usize],
+        subgroup_size: nir.subgroup_size() as usize,
+        num_subgroups: nir.num_subgroups() as usize,
+    };
+
+    (kernel_info, nir)
 }
 
 fn extract<'a, const S: usize>(buf: &'a mut &[u8]) -> &'a [u8; S] {

src/gallium/frontends/rusticl/core/program.rs

@@ -129,7 +129,7 @@ impl NirKernelBuild {
 }
 
 impl ProgramBuild {
-    fn attribute_str(&self, kernel: &str, d: &Device) -> String {
+    pub fn attribute_str(&self, kernel: &str, d: &Device) -> String {
         let info = self.dev_build(d);
 
         let attributes_strings = [
@@ -163,19 +163,7 @@ impl ProgramBuild {
 
             // TODO: we could run this in parallel?
             for dev in self.devs_with_build() {
-                let (nir, args, internal_args) =
-                    convert_spirv_to_nir(self, kernel_name, &args, dev);
-                let attributes_string = self.attribute_str(kernel_name, dev);
-                let wgs = nir.workgroup_size();
-
-                let kernel_info = KernelInfo {
-                    args: args,
-                    internal_args: internal_args,
-                    attributes_string: attributes_string,
-                    work_group_size: [wgs[0] as usize, wgs[1] as usize, wgs[2] as usize],
-                    subgroup_size: nir.subgroup_size() as usize,
-                    num_subgroups: nir.num_subgroups() as usize,
-                };
+                let (kernel_info, nir) = convert_spirv_to_nir(self, kernel_name, &args, dev);
                 kernel_info_set.insert(kernel_info);
 
                 self.builds