[Flint] moving ir gen specific code to separate file

src/intel/compiler/targets/targets.zig

@@ -0,0 +1,29 @@
+const std = @import("std");
+const shader_ir = @import("shader_ir").ir;
+const device = @import("../device.zig");
+const program_ir = @import("../ir/program.zig");
+const common_ir = @import("../lower/common_ir.zig");
+
+pub const gen9 = @import("gen9/gen9.zig");
+
+pub const Error = gen9.Error || error{UnsupportedGeneration};
+pub const ValidationError = gen9.validator.Error || error{UnsupportedGeneration};
+
+pub fn lower(
+    allocator: std.mem.Allocator,
+    module: *shader_ir.module.Module,
+    device_info: device.DeviceInfo,
+    options: common_ir.Options,
+) Error!program_ir.Program {
+    return switch (device_info.generation) {
+        .gen9 => gen9.lower(allocator, module, device_info, options),
+        .gen10, .gen11 => Error.UnsupportedGeneration,
+    };
+}
+
+pub fn validate(program: *const program_ir.Program) ValidationError!void {
+    return switch (program.device_info.generation) {
+        .gen9 => gen9.validator.validate(program),
+        .gen10, .gen11 => ValidationError.UnsupportedGeneration,
+    };
+}