From: Andi Kleen <ak@gcc.gnu.org>
Date: Thu, 25 Jul 2024 20:54:50 +0000 (-0700)
Subject: PR116019: Improve tail call error message
X-Git-Tag: basepoints/gcc-16~7213
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=899ee4815424a73a2b9d899591fab3fcc4520b61;p=thirdparty%2Fgcc.git

PR116019: Improve tail call error message

The "tail call must be the same type" message is common on some
targets with C++, or without optimization. It is generated
when gcc believes there is an access of the return value
after the call. However usually it does not actually corespond
to a type mismatch, but can be caused for other reasons.

Make it slightly more vague to be less misleading.

gcc/ChangeLog:

	PR c++/116019
	* tree-tailcall.cc (find_tail_calls): Change tail call
	error message.
---

diff --git a/gcc/tree-tailcall.cc b/gcc/tree-tailcall.cc
index a68079d4f50..1901b1a13f9 100644
--- a/gcc/tree-tailcall.cc
+++ b/gcc/tree-tailcall.cc
@@ -632,7 +632,7 @@ find_tail_calls (basic_block bb, struct tailcall **ret, bool only_musttail,
       && may_be_aliased (result_decl)
       && ref_maybe_used_by_stmt_p (call, result_decl, false))
     {
-      maybe_error_musttail (call, _("tail call must be same type"));
+      maybe_error_musttail (call, _("return value used after call"));
       return;
     }