From 81fea426da8c4687bb32e6894dc26f00ae211822 Mon Sep 17 00:00:00 2001
From: Marek Polacek <polacek@redhat.com>
Date: Mon, 26 Sep 2016 09:42:50 +0000
Subject: Implement -Wimplicit-fallthrough.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

From-SVN: r240485
---
 libstdc++-v3/ChangeLog               | 5 +++++
 libstdc++-v3/libsupc++/hash_bytes.cc | 2 ++
 2 files changed, 7 insertions(+)

(limited to 'libstdc++-v3')

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 6f134cb..230f764 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,8 @@
+2016-09-26  Marek Polacek  <polacek@redhat.com>
+
+	PR c/7652
+	* libsupc++/hash_bytes.cc: Add [[gnu::fallthrough]].
+
 2016-09-25  François Dumont  <fdumont@gcc.gnu.org>
 
 	* src/c++11/debug.cc: Include debug/vector. Include cctype. Remove
diff --git a/libstdc++-v3/libsupc++/hash_bytes.cc b/libstdc++-v3/libsupc++/hash_bytes.cc
index 2e5bbfa..1042de6 100644
--- a/libstdc++-v3/libsupc++/hash_bytes.cc
+++ b/libstdc++-v3/libsupc++/hash_bytes.cc
@@ -95,8 +95,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       {
       case 3:
 	hash ^= static_cast<unsigned char>(buf[2]) << 16;
+	[[gnu::fallthrough]];
       case 2:
 	hash ^= static_cast<unsigned char>(buf[1]) << 8;
+	[[gnu::fallthrough]];
       case 1:
 	hash ^= static_cast<unsigned char>(buf[0]);
 	hash *= m;
-- 
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