From 13a8f00e9fefdf848464dcc1eaa2db450bdf2fc6 Mon Sep 17 00:00:00 2001 From: Eric Christopher Date: Thu, 26 Mar 2015 00:50:13 +0000 Subject: [PATCH] Add an explanatory comment as to why we're turning on and off certain other options as aliases. There be dragons here. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@233238 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/clang/Driver/Options.td | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td index bab4be9a43..593969c72f 100644 --- a/include/clang/Driver/Options.td +++ b/include/clang/Driver/Options.td @@ -1187,6 +1187,9 @@ def mno_sse3 : Flag<["-"], "mno-sse3">, Group; def mno_sse4a : Flag<["-"], "mno-sse4a">, Group; def mno_sse4_1 : Flag<["-"], "mno-sse4.1">, Group; def mno_sse4_2 : Flag<["-"], "mno-sse4.2">, Group; +// -mno-sse4 turns off sse4.1 which has the effect of turning off everything +// later than 4.1. -msse4 turns on 4.2 which has the effect of turning on +// everything earlier than 4.2. def mno_sse4 : Flag<["-"], "mno-sse4">, Alias; def mno_sse : Flag<["-"], "mno-sse">, Group; def mno_ssse3 : Flag<["-"], "mno-ssse3">, Group; -- 2.40.0