From: Philip Herron <herron.phi...@googlemail.com>

gcc/rust/ChangeLog:

        * typecheck/rust-type-util.cc (unify_site_and): improve debug

Signed-off-by: Philip Herron <herron.phi...@googlemail.com>
---
 gcc/rust/typecheck/rust-type-util.cc | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/gcc/rust/typecheck/rust-type-util.cc 
b/gcc/rust/typecheck/rust-type-util.cc
index 0f14e0a6008..2d661669b3f 100644
--- a/gcc/rust/typecheck/rust-type-util.cc
+++ b/gcc/rust/typecheck/rust-type-util.cc
@@ -24,6 +24,7 @@
 #include "rust-hir-type-check.h"
 #include "rust-hir-type-check-type.h"
 #include "rust-casts.h"
+#include "rust-mapping-common.h"
 #include "rust-unify.h"
 #include "rust-coercion.h"
 #include "rust-hir-type-bounds.h"
@@ -186,10 +187,12 @@ unify_site_and (HirId id, TyTy::TyWithLocation lhs, 
TyTy::TyWithLocation rhs,
   TyTy::BaseType *expected = lhs.get_ty ();
   TyTy::BaseType *expr = rhs.get_ty ();
 
-  rust_debug (
-    "unify_site_and commit %s infer %s id={%u} expected={%s} expr={%s}",
-    commit_if_ok ? "true" : "false", implicit_infer_vars ? "true" : "false", 
id,
-    expected->debug_str ().c_str (), expr->debug_str ().c_str ());
+  rust_debug_loc (
+    unify_locus,
+    "begin unify_site_and commit %s infer %s id={%u} expected={%s} expr={%s}",
+    commit_if_ok ? "true" : "false", implicit_infer_vars ? "true" : "false",
+    id == UNKNOWN_HIRID ? 0 : id, expected->debug_str ().c_str (),
+    expr->debug_str ().c_str ());
 
   std::vector<UnifyRules::CommitSite> commits;
   std::vector<UnifyRules::InferenceSite> infers;
@@ -197,6 +200,15 @@ unify_site_and (HirId id, TyTy::TyWithLocation lhs, 
TyTy::TyWithLocation rhs,
     = UnifyRules::Resolve (lhs, rhs, unify_locus, false /*commit inline*/,
                           emit_errors, implicit_infer_vars, commits, infers);
   bool ok = result->get_kind () != TyTy::TypeKind::ERROR;
+
+  rust_debug_loc (unify_locus,
+                 "unify_site_and done ok=%s commit %s infer %s id={%u} "
+                 "expected={%s} expr={%s}",
+                 ok ? "true" : "false", commit_if_ok ? "true" : "false",
+                 implicit_infer_vars ? "true" : "false",
+                 id == UNKNOWN_HIRID ? 0 : id, expected->debug_str ().c_str (),
+                 expr->debug_str ().c_str ());
+
   if (ok && commit_if_ok)
     {
       for (auto &c : commits)
-- 
2.49.0

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