selfhost: introduce using-based imports for compiler/parser/tools; keep includes temporarily. llvm: add PHI wiring JSON trace + unit/integration tests; fast test suite extended. runner: split selfhost helpers, small cleanups.

src/mir/builder/loops.rs

@@ -27,6 +27,8 @@ pub(crate) fn pop_loop_context(builder: &mut super::MirBuilder) {
 }
 
 /// Peek current loop header block id
+#[allow(dead_code)]
+#[allow(dead_code)]
 pub(crate) fn current_header(builder: &super::MirBuilder) -> Option<BasicBlockId> {
     builder.loop_header_stack.last().copied()
 }
@@ -37,11 +39,15 @@ pub(crate) fn current_exit(builder: &super::MirBuilder) -> Option<BasicBlockId>
 }
 
 /// Returns true if the builder is currently inside at least one loop context.
+#[allow(dead_code)]
+#[allow(dead_code)]
 pub(crate) fn in_loop(builder: &super::MirBuilder) -> bool {
     !builder.loop_header_stack.is_empty()
 }
 
 /// Current loop nesting depth (0 means not in a loop).
+#[allow(dead_code)]
+#[allow(dead_code)]
 pub(crate) fn depth(builder: &super::MirBuilder) -> usize {
     builder.loop_header_stack.len()
 }