feat: 新增 IR 层常量传播与折叠 pass

crates/oxide_fold/src/fold_log.rs

@@ -0,0 +1,37 @@
+//! 常量折叠 pass 日志宏：`fold_error!/warn!/info!/debug!/trace!`，经由 oxide_log 上报。
+//! 编译管线属 Kernel 子系统，`OXIDE_LOG=oxide::kernel=debug` 控制本 crate 日志。
+
+#[macro_export]
+macro_rules! fold_error {
+    ($($arg:tt)*) => {
+        oxide_log::__log_event!("oxide::kernel", oxide_log::tracing::Level::ERROR, $($arg)*)
+    };
+}
+
+#[macro_export]
+macro_rules! fold_warn {
+    ($($arg:tt)*) => {
+        oxide_log::__log_event!("oxide::kernel", oxide_log::tracing::Level::WARN, $($arg)*)
+    };
+}
+
+#[macro_export]
+macro_rules! fold_info {
+    ($($arg:tt)*) => {
+        oxide_log::__log_event!("oxide::kernel", oxide_log::tracing::Level::INFO, $($arg)*)
+    };
+}
+
+#[macro_export]
+macro_rules! fold_debug {
+    ($($arg:tt)*) => {
+        oxide_log::__log_event!("oxide::kernel", oxide_log::tracing::Level::DEBUG, $($arg)*)
+    };
+}
+
+#[macro_export]
+macro_rules! fold_trace {
+    ($($arg:tt)*) => {
+        oxide_log::__log_event!("oxide::kernel", oxide_log::tracing::Level::TRACE, $($arg)*)
+    };
+}