From 038df1baecf93ad9d17ba7deafb47e99b3e287ad Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Tue, 13 Mar 2018 00:39:21 +0100
Subject: re PR c++/84704 (internal compiler error: gimplification failed)

	PR c++/84704
	* tree.c (stabilize_reference_1): Return save_expr (e) for
	STATEMENT_LIST even if it doesn't have side-effects.

	* g++.dg/debug/pr84704.C: New test.

From-SVN: r258470
---
 gcc/tree.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'gcc/tree.c')

diff --git a/gcc/tree.c b/gcc/tree.c
index 63a29f4..1e1a1be 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -4352,6 +4352,11 @@ stabilize_reference_1 (tree e)
   switch (TREE_CODE_CLASS (code))
     {
     case tcc_exceptional:
+      /* Always wrap STATEMENT_LIST into SAVE_EXPR, even if it doesn't
+	 have side-effects.  */
+      if (code == STATEMENT_LIST)
+	return save_expr (e);
+      /* FALLTHRU */
     case tcc_type:
     case tcc_declaration:
     case tcc_comparison:
-- 
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