Rollup merge of #138980 - tmiasko:collect-var-debug-info, r=compiler-errors

Collect items referenced from var_debug_info

The collection is limited to full debuginfo builds to match behavior of FunctionCx::compute_per_local_var_debug_info.

Fixes #138942.

1 files changed, 6 insertions, 1 deletions

diff --git a/compiler/rustc_monomorphize/src/collector.rs b/compiler/rustc_monomorphize/src/collector.rs
index 679c614e9fa..2a1b20ba48b 100644
--- a/compiler/rustc_monomorphize/src/collector.rs
+++ b/compiler/rustc_monomorphize/src/collector.rs
@@ -231,7 +231,7 @@ use rustc_middle::ty::{
 use rustc_middle::util::Providers;
 use rustc_middle::{bug, span_bug};
 use rustc_session::Limit;
-use rustc_session::config::EntryFnType;
+use rustc_session::config::{DebugInfo, EntryFnType};
 use rustc_span::source_map::{Spanned, dummy_spanned, respan};
 use rustc_span::{DUMMY_SP, Span};
 use tracing::{debug, instrument, trace};
@@ -1235,6 +1235,11 @@ fn collect_items_of_instance<'tcx>(
     };
 
     if mode == CollectionMode::UsedItems {
+        if tcx.sess.opts.debuginfo == DebugInfo::Full {
+            for var_debug_info in &body.var_debug_info {
+                collector.visit_var_debug_info(var_debug_info);
+            }
+        }
         for (bb, data) in traversal::mono_reachable(body, tcx, instance) {
             collector.visit_basic_block_data(bb, data)
         }