[gcc r14-11739] c++: fix conversion issues

[Iain D Sandoe via Gcc-cvs]

https://gcc.gnu.org/g:b6094031eea96c116a386e7112ee79a6bde5207e

commit r14-11739-gb6094031eea96c116a386e7112ee79a6bde5207e
Author: Jason Merrill <ja...@redhat.com>
Date:   Mon Dec 23 19:57:56 2024 -0500

    c++: fix conversion issues
    
    back-port the coroutine part of this.
    
    Some issues caught by a check from another patch:
    
    In build_ramp_function, we're assigning REFERENCE_TYPE things, so we need to
    build the assignment directly rather than rely on functions that implement
    C++ semantics.
    
    gcc/cp/ChangeLog:
    
            * coroutines.cc (cp_coroutine_transform::build_ramp_function): Build
            INIT_EXPR directly.
    
    (cherry picked from commit dd3f3c71df66ed6fd3872ab780f5813831100d1c)

Diff:
---
 gcc/cp/coroutines.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/gcc/cp/coroutines.cc b/gcc/cp/coroutines.cc
index 77067be45ad4..09e2f3410627 100644
--- a/gcc/cp/coroutines.cc
+++ b/gcc/cp/coroutines.cc
@@ -5093,8 +5093,8 @@ morph_fn_to_coro (tree orig, tree *resumer, tree 
*destroyer)
 
          if (parm.rv_ref || parm.pt_ref)
            /* Initialise the frame reference field directly.  */
-           r = cp_build_modify_expr (fn_start, TREE_OPERAND (fld_idx, 0),
-                                     INIT_EXPR, arg, tf_warning_or_error);
+           r = build2 (INIT_EXPR, TREE_TYPE (arg),
+                       TREE_OPERAND (fld_idx, 0), arg);
          else
            {
              r = forward_parm (arg);