From d1b0795570e33fbee97e1fb7200aaacacf89905b Mon Sep 17 00:00:00 2001
From: Eric Christopher <echristo@gmail.com>
Date: Sat, 14 Nov 2015 03:04:00 +0000
Subject: [PATCH] Add MMX to the 3dnow enum and propagate changes around. This
 makes it somewhat more consistent with how the feature is used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253122 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86.td           | 11 +++++------
 lib/Target/X86/X86Subtarget.cpp |  1 -
 lib/Target/X86/X86Subtarget.h   |  9 +++------
 3 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/lib/Target/X86/X86.td b/lib/Target/X86/X86.td
index 0c55d01d775..7d9f396c1e9 100644
--- a/lib/Target/X86/X86.td
+++ b/lib/Target/X86/X86.td
@@ -52,12 +52,6 @@ def FeatureXSAVEC  : SubtargetFeature<"xsavec", "HasXSAVEC", "true",
 def FeatureXSAVES  : SubtargetFeature<"xsaves", "HasXSAVES", "true",
                                        "Support xsaves instructions">;
 
-// The MMX subtarget feature is separate from the rest of the SSE features
-// because it's important (for odd compatibility reasons) to be able to
-// turn it off explicitly while allowing SSE+ to be on.
-def FeatureMMX     : SubtargetFeature<"mmx","HasMMX", "true",
-                                      "Enable MMX instructions">;
-
 def FeatureSSE1    : SubtargetFeature<"sse", "X86SSELevel", "SSE1",
                                       "Enable SSE instructions",
                                       // SSE codegen depends on cmovs, and all
@@ -78,6 +72,11 @@ def FeatureSSE41   : SubtargetFeature<"sse4.1", "X86SSELevel", "SSE41",
 def FeatureSSE42   : SubtargetFeature<"sse4.2", "X86SSELevel", "SSE42",
                                       "Enable SSE 4.2 instructions",
                                       [FeatureSSE41]>;
+// The MMX subtarget feature is separate from the rest of the SSE features
+// because it's important (for odd compatibility reasons) to be able to
+// turn it off explicitly while allowing SSE+ to be on.
+def FeatureMMX     : SubtargetFeature<"mmx","X863DNowLevel", "MMX",
+                                      "Enable MMX instructions">;
 def Feature3DNow   : SubtargetFeature<"3dnow", "X863DNowLevel", "ThreeDNow",
                                       "Enable 3DNow! instructions",
                                       [FeatureMMX]>;
diff --git a/lib/Target/X86/X86Subtarget.cpp b/lib/Target/X86/X86Subtarget.cpp
index ad593f4be2e..44a46b7e07a 100644
--- a/lib/Target/X86/X86Subtarget.cpp
+++ b/lib/Target/X86/X86Subtarget.cpp
@@ -231,7 +231,6 @@ void X86Subtarget::initializeEnvironment() {
   X86SSELevel = NoSSE;
   X863DNowLevel = NoThreeDNow;
   HasCMov = false;
-  HasMMX = false;
   HasX86_64 = false;
   HasPOPCNT = false;
   HasSSE4A = false;
diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h
index 85d4d1ae404..425bc2482e9 100644
--- a/lib/Target/X86/X86Subtarget.h
+++ b/lib/Target/X86/X86Subtarget.h
@@ -51,7 +51,7 @@ protected:
   };
 
   enum X863DNowEnum {
-    NoThreeDNow, ThreeDNow, ThreeDNowA
+    NoThreeDNow, MMX, ThreeDNow, ThreeDNowA
   };
 
   enum X86ProcFamilyEnum {
@@ -67,16 +67,13 @@ protected:
   /// SSE1, SSE2, SSE3, SSSE3, SSE41, SSE42, or none supported.
   X86SSEEnum X86SSELevel;
 
-  /// 3DNow, 3DNow Athlon, or none supported.
+  /// MMX, 3DNow, 3DNow Athlon, or none supported.
   X863DNowEnum X863DNowLevel;
 
   /// True if this processor has conditional move instructions
   /// (generally pentium pro+).
   bool HasCMov;
 
-  /// True if this processor supports MMX instructions.
-  bool HasMMX;
-
   /// True if the processor supports X86-64 instructions.
   bool HasX86_64;
 
@@ -334,7 +331,6 @@ public:
   void setPICStyle(PICStyles::Style Style)  { PICStyle = Style; }
 
   bool hasCMov() const { return HasCMov; }
-  bool hasMMX() const { return HasMMX; }
   bool hasSSE1() const { return X86SSELevel >= SSE1; }
   bool hasSSE2() const { return X86SSELevel >= SSE2; }
   bool hasSSE3() const { return X86SSELevel >= SSE3; }
@@ -347,6 +343,7 @@ public:
   bool hasFp256() const { return hasAVX(); }
   bool hasInt256() const { return hasAVX2(); }
   bool hasSSE4A() const { return HasSSE4A; }
+  bool hasMMX() const { return X863DNowLevel >= MMX; }
   bool has3DNow() const { return X863DNowLevel >= ThreeDNow; }
   bool has3DNowA() const { return X863DNowLevel >= ThreeDNowA; }
   bool hasPOPCNT() const { return HasPOPCNT; }
-- 
2.34.1