[gcc/devel/rust/master] Add extra debugging for method call expressions

[gcc/devel/rust/master] Add extra debugging for method call expressions

[Thomas Schwinge]

https://gcc.gnu.org/g:721c7a472c4cf5dc74337c997ff627187b577d60

commit 721c7a472c4cf5dc74337c997ff627187b577d60
Author: Philip Herron <philip.herron@embecosm.com>
Date:   Wed Aug 31 17:07:09 2022 +0100

    Add extra debugging for method call expressions

Diff:
---
 gcc/rust/typecheck/rust-hir-type-check-expr.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gcc/rust/typecheck/rust-hir-type-check-expr.cc b/gcc/rust/typecheck/rust-hir-type-check-expr.cc
index 57ed370571d..9a0d144ab10 100644
--- a/gcc/rust/typecheck/rust-hir-type-check-expr.cc
+++ b/gcc/rust/typecheck/rust-hir-type-check-expr.cc
@@ -1024,6 +1024,11 @@ TypeCheckExpr::visit (HIR::MethodCallExpr &expr)
       return;
     }
 
+  rust_debug_loc (expr.get_method_name ().get_locus (),
+		  "resolved method to: {%u} {%s}",
+		  candidate.candidate.ty->get_ref (),
+		  candidate.candidate.ty->debug_str ().c_str ());
+
   // Get the adjusted self
   Adjuster adj (receiver_tyty);
   TyTy::BaseType *adjusted_self = adj.adjust_type (candidate.adjustments);
@@ -1120,6 +1125,9 @@ TypeCheckExpr::visit (HIR::MethodCallExpr &expr)
   // apply any remaining generic arguments
   if (expr.get_method_name ().has_generic_args ())
     {
+      rust_debug_loc (expr.get_method_name ().get_generic_args ().get_locus (),
+		      "applying generic arguments to method_call: {%s}",
+		      lookup->debug_str ().c_str ());
       HIR::GenericArgs &args = expr.get_method_name ().get_generic_args ();
       lookup
 	= SubstMapper::Resolve (lookup, expr.get_method_name ().get_locus (),
@@ -1129,10 +1137,14 @@ TypeCheckExpr::visit (HIR::MethodCallExpr &expr)
     }
   else if (lookup->needs_generic_substitutions ())
     {
+      rust_debug ("method needs inference: {%s}",
+		  lookup->debug_str ().c_str ());
       lookup = SubstMapper::InferSubst (lookup,
 					expr.get_method_name ().get_locus ());
     }
 
+  rust_debug ("type-checking method_call: {%s}", lookup->debug_str ().c_str ());
+
   TyTy::BaseType *function_ret_tyty
     = TyTy::TypeCheckMethodCallExpr::go (lookup, expr, adjusted_self, context);
   if (function_ret_tyty == nullptr