[llvm] r238916 - X86: Added MPX feature and bound registers.

[Elena Demikhovsky]

Author: delena
Date: Wed Jun  3 05:30:57 2015
New Revision: 238916

URL: http://llvm.org/viewvc/llvm-project?rev=238916&view=rev
Log:
X86: Added MPX feature and bound registers.
Intel® Memory Protection Extensions (Intel® MPX) is a new feature in Skylake.
It is a part of KNL and SKX sets. It is also a part of Skylake client.

I added definition of %bnd0 - %bnd3 registers, each register is a pair of 64-bit integers.


Modified:
    llvm/trunk/lib/Target/X86/X86.td
    llvm/trunk/lib/Target/X86/X86InstrInfo.td
    llvm/trunk/lib/Target/X86/X86RegisterInfo.td
    llvm/trunk/lib/Target/X86/X86Subtarget.cpp
    llvm/trunk/lib/Target/X86/X86Subtarget.h

Modified: llvm/trunk/lib/Target/X86/X86.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86.td?rev=238916&r1=238915&r2=238916&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86.td (original)
+++ llvm/trunk/lib/Target/X86/X86.td Wed Jun  3 05:30:57 2015
@@ -168,6 +168,8 @@ def FeaturePRFCHW  : SubtargetFeature<"p
                                       "Support PRFCHW instructions">;
 def FeatureRDSEED  : SubtargetFeature<"rdseed", "HasRDSEED", "true",
                                       "Support RDSEED instruction">;
+def FeatureMPX     : SubtargetFeature<"mpx", "HasMPX", "true",
+                                      "Support MPX instructions">;
 def FeatureLeaForSP : SubtargetFeature<"lea-sp", "UseLeaForSP", "true",
                                      "Use LEA for adjusting the stack pointer">;
 def FeatureSlowDivide32 : SubtargetFeature<"idivl-to-divb",
@@ -380,7 +382,7 @@ class KnightsLandingProc<string Name> :
                       FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
                       FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
                       FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
-                      FeatureSlowIncDec]>;
+                      FeatureSlowIncDec, FeatureMPX]>;
 def : KnightsLandingProc<"knl">;
 
 // FIXME: define SKX model
@@ -391,7 +393,7 @@ class SkylakeProc<string Name> : Process
                       FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
                       FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
                       FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE,
-                      FeatureSlowIncDec]>;
+                      FeatureSlowIncDec, FeatureMPX]>;
 def : SkylakeProc<"skylake">;
 def : SkylakeProc<"skx">; // Legacy alias.
 

Modified: llvm/trunk/lib/Target/X86/X86InstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrInfo.td?rev=238916&r1=238915&r2=238916&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrInfo.td (original)
+++ llvm/trunk/lib/Target/X86/X86InstrInfo.td Wed Jun  3 05:30:57 2015
@@ -788,6 +788,7 @@ def HasRDSEED    : Predicate<"Subtarget-
 def HasPrefetchW : Predicate<"Subtarget->hasPRFCHW()">;
 def FPStackf32   : Predicate<"!Subtarget->hasSSE1()">;
 def FPStackf64   : Predicate<"!Subtarget->hasSSE2()">;
+def HasMPX       : Predicate<"Subtarget->hasMPX()">;
 def HasCmpxchg16b: Predicate<"Subtarget->hasCmpxchg16b()">;
 def Not64BitMode : Predicate<"!Subtarget->is64Bit()">,
                              AssemblerPredicate<"!Mode64Bit", "Not 64-bit mode">;

Modified: llvm/trunk/lib/Target/X86/X86RegisterInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86RegisterInfo.td?rev=238916&r1=238915&r2=238916&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86RegisterInfo.td (original)
+++ llvm/trunk/lib/Target/X86/X86RegisterInfo.td Wed Jun  3 05:30:57 2015
@@ -302,6 +302,11 @@ def CR15 : X86Reg<"cr15", 15>;
 def EIZ : X86Reg<"eiz", 4>;
 def RIZ : X86Reg<"riz", 4>;
 
+// Bound registers, used in MPX instructions
+def BND0 : X86Reg<"bnd0",   0>;
+def BND1 : X86Reg<"bnd1",   0>;
+def BND2 : X86Reg<"bnd2",   0>;
+def BND3 : X86Reg<"bnd3",   0>;
 
 //===----------------------------------------------------------------------===//
 // Register Class Definitions... now that we have all of the pieces, define the
@@ -484,3 +489,6 @@ def VK8WM   : RegisterClass<"X86", [v8i1
 def VK16WM  : RegisterClass<"X86", [v16i1], 16, (add VK8WM)>   {let Size = 16;}
 def VK32WM  : RegisterClass<"X86", [v32i1], 32, (add VK16WM)> {let Size = 32;}
 def VK64WM  : RegisterClass<"X86", [v64i1], 64, (add VK32WM)> {let Size = 64;}
+
+// Bound registers
+def BNDR : RegisterClass<"X86", [v2i64], 128, (sequence "BND%u", 0, 3)>;
\ No newline at end of file

Modified: llvm/trunk/lib/Target/X86/X86Subtarget.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.cpp?rev=238916&r1=238915&r2=238916&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.cpp Wed Jun  3 05:30:57 2015
@@ -259,6 +259,7 @@ void X86Subtarget::initializeEnvironment
   HasSHA = false;
   HasPRFCHW = false;
   HasRDSEED = false;
+  HasMPX = false;
   IsBTMemSlow = false;
   IsSHLDSlow = false;
   IsUAMemFast = false;

Modified: llvm/trunk/lib/Target/X86/X86Subtarget.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86Subtarget.h?rev=238916&r1=238915&r2=238916&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86Subtarget.h (original)
+++ llvm/trunk/lib/Target/X86/X86Subtarget.h Wed Jun  3 05:30:57 2015
@@ -218,6 +218,9 @@ protected:
   /// Processor has AVX-512 Vector Length eXtenstions
   bool HasVLX;
 
+  /// Processot supports MPX - Memory Protection Extensions
+  bool HasMPX;
+
   /// Use software floating point for code generation.
   bool UseSoftFloat;
 
@@ -385,6 +388,7 @@ public:
   bool hasDQI() const { return HasDQI; }
   bool hasBWI() const { return HasBWI; }
   bool hasVLX() const { return HasVLX; }
+  bool hasMPX() const { return HasMPX; }
 
   bool isAtom() const { return X86ProcFamily == IntelAtom; }
   bool isSLM() const { return X86ProcFamily == IntelSLM; }