From 999e617d3121b82921c8031ee695fd036f553f04 Mon Sep 17 00:00:00 2001
From: Patrick Palka <ppalka@redhat.com>
Date: Sat, 3 Jun 2023 09:03:27 -0400
Subject: c++: mangle noexcept-expr [PR70790]

This implements noexcept(expr) mangling and demangling as per the
Itanium ABI.

	PR c++/70790

gcc/cp/ChangeLog:

	* mangle.cc (write_expression): Handle NOEXCEPT_EXPR.

libiberty/ChangeLog:

	* cp-demangle.c (cplus_demangle_operators): Add the noexcept
	operator.
	(d_print_comp_inner) <case DEMANGLE_COMPONENT_UNARY>: Always
	print parens around the operand of noexcept too.
	* testsuite/demangle-expected: Test noexcept operator
	demangling.

gcc/testsuite/ChangeLog:

	* g++.dg/abi/mangle78.C: New test.
---
 gcc/cp/mangle.cc | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'gcc/cp')

diff --git a/gcc/cp/mangle.cc b/gcc/cp/mangle.cc
index 826c5e7..7dab4e6 100644
--- a/gcc/cp/mangle.cc
+++ b/gcc/cp/mangle.cc
@@ -3402,6 +3402,11 @@ write_expression (tree expr)
       else
 	write_string ("tr");
     }
+  else if (code == NOEXCEPT_EXPR)
+    {
+      write_string ("nx");
+      write_expression (TREE_OPERAND (expr, 0));
+    }
   else if (code == CONSTRUCTOR)
     {
       bool braced_init = BRACE_ENCLOSED_INITIALIZER_P (expr);
-- 
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