From: Reid Kleckner <reid@kleckner.net>
Date: Sat, 12 Jul 2014 00:29:05 +0000 (+0000)
Subject: clang-cl: Make all x86 CPU feature flags available, such as -msse3
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f7c672d3bd5c307d702fee08cb73d58a9726ba9a;p=clang

clang-cl: Make all x86 CPU feature flags available, such as -msse3

Ideally, we would use the /arch cl.exe flag for this stuff.
Unfortunately, MSVC supports only 5 /arch flag values, which isn't
nearly enough to cover all the CPU features that LLVM cares about.  At
the very least, we need to know about SSE3 and SSE4.1 in addition to
SSE, SSE2, AVX, and AVX2.

In the future we should add the relevant /arch mappings in addition to
these gcc-style -m flags.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212869 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 2a115ed4ce..6af0f686b2 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -73,7 +73,7 @@ def g_flags_Group         : OptionGroup<"<g flags group>">;
 def i_Group               : OptionGroup<"<i group>">, Group<CompileOnly_Group>;
 def clang_i_Group         : OptionGroup<"<clang i group>">, Group<i_Group>;
 def m_Group               : OptionGroup<"<m group>">, Group<CompileOnly_Group>;
-def m_x86_Features_Group  : OptionGroup<"<m x86 features group>">, Group<m_Group>;
+def m_x86_Features_Group  : OptionGroup<"<m x86 features group>">, Group<m_Group>, Flags<[CoreOption]>;
 def m_hexagon_Features_Group  : OptionGroup<"<m hexagon features group>">, Group<m_Group>;
 def m_arm_Features_Group  : OptionGroup<"<m arm features group>">, Group<m_Group>;
 def m_aarch64_Features_Group  : OptionGroup<"<m aarch64 features group>">, Group<m_Group>;
diff --git a/test/Driver/cl-options.c b/test/Driver/cl-options.c
index 90b63259fe..bd77bddbf1 100644
--- a/test/Driver/cl-options.c
+++ b/test/Driver/cl-options.c
@@ -285,8 +285,10 @@
 // Xclang: "-cc1"
 // Xclang: "hellocc1"
 
-// We support -m32 and -m64.
-// RUN: %clang_cl /Zs /WX -m32 -m64 -### -- 2>&1 %s | FileCheck -check-prefix=MFLAGS %s
+// We support -m32 and -m64.  We support all x86 CPU feature flags in gcc's -m
+// flag space.
+// RUN: %clang_cl /Zs /WX -m32 -m64 -msse3 -msse4.1 -mavx -mno-avx \
+// RUN:     -### -- 2>&1 %s | FileCheck -check-prefix=MFLAGS %s
 // MFLAGS-NOT: argument unused during compilation
 
 // RTTI is on by default. /GR- controls -fno-rtti-data.