[gcc r14-7935] gccrs: Remove stmt_tree and dependency on cp_token_cache

[Arthur Cohen]

https://gcc.gnu.org/g:3d75a9b0edf7b76ac45246e4591a9ab437f54825

commit r14-7935-g3d75a9b0edf7b76ac45246e4591a9ab437f54825
Author: Owen Avery <powerboat9.gamer@gmail.com>
Date:   Fri Aug 18 17:02:16 2023 -0400

    gccrs: Remove stmt_tree and dependency on cp_token_cache
    
    gcc/rust/ChangeLog:
    
            * backend/rust-tree.h
            (struct stmt_tree_s): Remove.
            (typedef stmt_tree): Remove.
            (c_language_function::x_stmt_tree): Remove.
            (saved_scope::x_stmt_tree): Remove.
            (lang_decl_fn::pending_inline_p): Remove.
            (lang_decl_fn::spare): Adjust size.
            (lang_decl_fn::pending_inline_info): Remove.
    
    Signed-off-by: Owen Avery <powerboat9.gamer@gmail.com>

Diff:
---
 gcc/rust/backend/rust-tree.h | 40 ++--------------------------------------
 1 file changed, 2 insertions(+), 38 deletions(-)

diff --git a/gcc/rust/backend/rust-tree.h b/gcc/rust/backend/rust-tree.h
index 605d0ddcb5c..38e7393983b 100644
--- a/gcc/rust/backend/rust-tree.h
+++ b/gcc/rust/backend/rust-tree.h
@@ -2019,31 +2019,6 @@ struct GTY (()) lang_decl_base
    || TREE_CODE (NODE) == TEMPLATE_DECL || TREE_CODE (NODE) == USING_DECL      \
    || TREE_CODE (NODE) == CONCEPT_DECL)
 
-// forked from gcc/c-family-common.h stmt_tree_s
-
-/* Information about a statement tree.  */
-
-struct GTY (()) stmt_tree_s
-{
-  /* A stack of statement lists being collected.  */
-  vec<tree, va_gc> *x_cur_stmt_list;
-
-  /* In C++, Nonzero if we should treat statements as full
-     expressions.  In particular, this variable is non-zero if at the
-     end of a statement we should destroy any temporaries created
-     during that statement.  Similarly, if, at the end of a block, we
-     should destroy any local variables in this block.  Normally, this
-     variable is nonzero, since those are the normal semantics of
-     C++.
-
-     This flag has no effect in C.  */
-  int stmts_are_full_exprs_p;
-};
-
-// forked from gcc/c-family-common.h stmt_tree_s
-
-typedef struct stmt_tree_s *stmt_tree;
-
 // forked from gcc/c-family-common.h c_language_function
 
 /* Global state pertinent to the current function.  Some C dialects
@@ -2051,10 +2026,6 @@ typedef struct stmt_tree_s *stmt_tree;
 
 struct GTY (()) c_language_function
 {
-  /* While we are parsing the function, this contains information
-     about the statement-tree that we are building.  */
-  struct stmt_tree_s x_stmt_tree;
-
   /* Vector of locally defined typedefs, for
      -Wunused-local-typedefs.  */
   vec<tree, va_gc> *local_typedefs;
@@ -2140,8 +2111,6 @@ struct GTY (()) saved_scope
   int noexcept_operand;
   int ref_temp_count;
 
-  struct stmt_tree_s x_stmt_tree;
-
   hash_map<tree, tree> *GTY ((skip)) x_local_specializations;
   vec<omp_declare_target_attr, va_gc> *omp_declare_target_attribute;
 
@@ -2268,7 +2237,6 @@ struct GTY (()) lang_decl_fn
   unsigned defaulted_p : 1;
   unsigned has_in_charge_parm_p : 1;
   unsigned has_vtt_parm_p : 1;
-  unsigned pending_inline_p : 1;
   unsigned nonconverting : 1;
   unsigned thunk_p : 1;
 
@@ -2280,7 +2248,7 @@ struct GTY (()) lang_decl_fn
   unsigned coroutine_p : 1;
   unsigned implicit_constexpr : 1;
 
-  unsigned spare : 9;
+  unsigned spare : 10;
 
   /* 32-bits padding on 64-bit host.  */
 
@@ -2309,11 +2277,7 @@ struct GTY (()) lang_decl_fn
     HOST_WIDE_INT GTY ((tag ("1"))) fixed_offset;
   } GTY ((desc ("%1.thunk_p"))) u5;
 
-  union lang_decl_u3
-  {
-    struct cp_token_cache *GTY ((tag ("1"))) pending_inline_info;
-    tree GTY ((tag ("0"))) saved_auto_return_type;
-  } GTY ((desc ("%1.pending_inline_p"))) u;
+  tree GTY (()) saved_auto_return_type;
 };
 
 // forked from gcc/cp/cp-tree.h lang_decl_ns