Add HLE target feature

[darkbuck]

Summary

Hi All

The attached patch add HLE feature in X86 backend and routines to detect HLE, check HLE features. The following patch will rely on this patch to check the availability of HLE.

Yours

• Michael

[darkbuck]

the patch is rebased to trunk and latest changes on replacing TargetFlags to HLEHint

[darkbuck]

Hi All

The patch is rebased against LLVM trunk. There's no significant change.

Thanks

• Michael

[chandlerc]

lib/Target/X86/X86.td

123–126

aoeusrcahoeursch

lib/Target/X86/X86.td

                                       "Support BMI2 instructions">;
 def FeatureRTM     : SubtargetFeature<"rtm", "HasRTM", "true",
                                       "Support RTM instructions">;
+def FeatureHLE     : SubtargetFeature<"hle", "HasHLE", "true",
+                                      "Support HLE">;
 def FeatureADX     : SubtargetFeature<"adx", "HasADX", "true",
                                       "Support ADX instructions">;
 def FeatureLeaForSP : SubtargetFeature<"lea-sp", "UseLeaForSP", "true",

                                FeatureRDRAND, FeatureF16C, FeatureFSGSBase,
                                FeatureMOVBE, FeatureLZCNT, FeatureBMI,
                                FeatureBMI2, FeatureFMA,
-                               FeatureRTM]>;
+                               FeatureRTM, FeatureHLE]>;
 
 def : Proc<"k6",              [FeatureMMX]>;
 def : Proc<"k6-2",            [Feature3DNow]>;

lib/Target/X86/X86InstrInfo.td

 def HasBMI       : Predicate<"Subtarget->hasBMI()">;
 def HasBMI2      : Predicate<"Subtarget->hasBMI2()">;
 def HasRTM       : Predicate<"Subtarget->hasRTM()">;
+def HasHLE       : Predicate<"Subtarget->hasHLE()">;
 def HasADX       : Predicate<"Subtarget->hasADX()">;
 def FPStackf32   : Predicate<"!Subtarget->hasSSE1()">;
 def FPStackf64   : Predicate<"!Subtarget->hasSSE2()">;

lib/Target/X86/X86Subtarget.h

   /// HasRTM - Processor has RTM instructions.
   bool HasRTM;
 
+  /// HasHLE - Processor has HLE.
+  bool HasHLE;
+
   /// HasADX - Processor has ADX instructions.
   bool HasADX;
 

   bool hasBMI() const { return HasBMI; }
   bool hasBMI2() const { return HasBMI2; }
   bool hasRTM() const { return HasRTM; }
+  bool hasHLE() const { return HasHLE; }
   bool hasADX() const { return HasADX; }
   bool isBTMemSlow() const { return IsBTMemSlow; }
   bool isUnalignedMemAccessFast() const { return IsUAMemFast; }

lib/Target/X86/X86Subtarget.cpp

         HasBMI = true;
         ToggleFeature(X86::FeatureBMI);
       }
+      if ((EBX >> 4) & 0x1) {
+        HasHLE = true;
+        ToggleFeature(X86::FeatureHLE);
+      }
       if (IsIntel && ((EBX >> 5) & 0x1)) {
         X86SSELevel = AVX2;
         ToggleFeature(X86::FeatureAVX2);

   HasBMI = false;
   HasBMI2 = false;
   HasRTM = false;
+  HasHLE = false;
   HasADX = false;
   IsBTMemSlow = false;
   IsUAMemFast = false;