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Re: Implement -Wswitch-fallthrough: libstdc++
- From: Marek Polacek <polacek at redhat dot com>
- To: GCC Patches <gcc-patches at gcc dot gnu dot org>
- Cc: libstdc++ at gcc dot gnu dot org
- Date: Mon, 11 Jul 2016 21:57:59 +0200
- Subject: Re: Implement -Wswitch-fallthrough: libstdc++
- Authentication-results: sourceware.org; auth=none
- References: <20160711194340.GI13963@redhat.com>
2016-07-11 Marek Polacek <polacek@redhat.com>
PR c/7652
* libsupc++/hash_bytes.cc: Use __builtin_fallthrough.
diff --git gcc/libstdc++-v3/libsupc++/hash_bytes.cc gcc/libstdc++-v3/libsupc++/hash_bytes.cc
index 2e5bbfa..818331f 100644
--- gcc/libstdc++-v3/libsupc++/hash_bytes.cc
+++ gcc/libstdc++-v3/libsupc++/hash_bytes.cc
@@ -95,8 +95,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
case 3:
hash ^= static_cast<unsigned char>(buf[2]) << 16;
+ __builtin_fallthrough ();
case 2:
hash ^= static_cast<unsigned char>(buf[1]) << 8;
+ __builtin_fallthrough ();
case 1:
hash ^= static_cast<unsigned char>(buf[0]);
hash *= m;