From: Eric Christopher <echristo@gmail.com>
Date: Wed, 25 Mar 2015 22:09:26 +0000 (+0000)
Subject: Make the msse4/mno-sse4 flags aliases of the maximum sse values
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=691b3a0ba66421e820c629cad405485965a5b157;p=clang

Make the msse4/mno-sse4 flags aliases of the maximum sse values
they enable/disable.

This fixes two things:

a) sse4 isn't actually a target feature, don't treat it as one.
b) we weren't correctly disabling sse4.1 when we'd pass -mno-sse4
   after enabling it, thus passing preprocessor directives and
   (soon) passing the function attribute as well when we shouldn't.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@233223 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index ef9df81155..bab4be9a43 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -1185,9 +1185,9 @@ def mno_stackrealign : Flag<["-"], "mno-stackrealign">, Group<m_Group>;
 def mno_sse2 : Flag<["-"], "mno-sse2">, Group<m_x86_Features_Group>;
 def mno_sse3 : Flag<["-"], "mno-sse3">, Group<m_x86_Features_Group>;
 def mno_sse4a : Flag<["-"], "mno-sse4a">, Group<m_x86_Features_Group>;
-def mno_sse4 : Flag<["-"], "mno-sse4">, Group<m_x86_Features_Group>;
 def mno_sse4_1 : Flag<["-"], "mno-sse4.1">, Group<m_x86_Features_Group>;
 def mno_sse4_2 : Flag<["-"], "mno-sse4.2">, Group<m_x86_Features_Group>;
+def mno_sse4 : Flag<["-"], "mno-sse4">, Alias<mno_sse4_1>;
 def mno_sse : Flag<["-"], "mno-sse">, Group<m_x86_Features_Group>;
 def mno_ssse3 : Flag<["-"], "mno-ssse3">, Group<m_x86_Features_Group>;
 def mno_aes : Flag<["-"], "mno-aes">, Group<m_x86_Features_Group>;
@@ -1310,9 +1310,9 @@ def mimplicit_float : Flag<["-"], "mimplicit-float">, Group<m_Group>;
 def msse2 : Flag<["-"], "msse2">, Group<m_x86_Features_Group>;
 def msse3 : Flag<["-"], "msse3">, Group<m_x86_Features_Group>;
 def msse4a : Flag<["-"], "msse4a">, Group<m_x86_Features_Group>;
-def msse4 : Flag<["-"], "msse4">, Group<m_x86_Features_Group>;
 def msse4_1 : Flag<["-"], "msse4.1">, Group<m_x86_Features_Group>;
 def msse4_2 : Flag<["-"], "msse4.2">, Group<m_x86_Features_Group>;
+def msse4 : Flag<["-"], "msse4">, Alias<msse4_2>;
 def msse : Flag<["-"], "msse">, Group<m_x86_Features_Group>;
 def mssse3 : Flag<["-"], "mssse3">, Group<m_x86_Features_Group>;
 def maes : Flag<["-"], "maes">, Group<m_x86_Features_Group>;
diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index b1a245e1b2..c8fa0cce25 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -2580,11 +2580,6 @@ void X86TargetInfo::setXOPLevel(llvm::StringMap<bool> &Features, XOPEnum Level,
 
 void X86TargetInfo::setFeatureEnabledImpl(llvm::StringMap<bool> &Features,
                                           StringRef Name, bool Enabled) {
-  // FIXME: This *really* should not be here.  We need some way of translating
-  // options into llvm subtarget features.
-  if (Name == "sse4")
-    Name = "sse4.2";
-
   Features[Name] = Enabled;
 
   if (Name == "mmx") {
diff --git a/test/Driver/x86_features.c b/test/Driver/x86_features.c
index 26f0bd8bcf..e5ca704fdc 100644
--- a/test/Driver/x86_features.c
+++ b/test/Driver/x86_features.c
@@ -1,5 +1,5 @@
 // RUN: %clang -target i386-unknown-unknown -### -S %s -msse -msse4 -mno-sse -mno-mmx -msse  2>&1 | FileCheck %s
-// CHECK: "pentium4" "-target-feature" "+sse4" "-target-feature" "-mmx" "-target-feature" "+sse"
+// CHECK: "pentium4" "-target-feature" "+sse4.2" "-target-feature" "-mmx" "-target-feature" "+sse"
 // Note that we filter out all but the last -m(no)sse.
 
 // Test that we don't produce an error with -mieee-fp.
diff --git a/test/Preprocessor/x86_target_features.c b/test/Preprocessor/x86_target_features.c
index 806eeec961..ac9e7309f4 100644
--- a/test/Preprocessor/x86_target_features.c
+++ b/test/Preprocessor/x86_target_features.c
@@ -9,6 +9,10 @@
 // SSE4: #define __SSE__ 1
 // SSE4: #define __SSSE3__ 1
 
+// RUN: %clang -target i386-unknown-unknown -march=core2 -msse4.1 -mno-sse4 -x c -E -dM -o - %s | FileCheck --check-prefix=NOSSE4 %s
+
+// NOSSE4-NOT: #define __SSE4_1__ 1
+
 // RUN: %clang -target i386-unknown-unknown -march=core2 -msse4 -mno-sse2 -x c -E -dM -o - %s | FileCheck --check-prefix=SSE %s
 
 // SSE-NOT: #define __SSE2_MATH__ 1