Add placeholder for thumb2 stuff

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72593 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 53 insertions, 20 deletions

diff --git a/lib/Target/ARM/ARM.td b/lib/Target/ARM/ARM.td
index 12789d9..4ac6857 100644
--- a/lib/Target/ARM/ARM.td
+++ b/lib/Target/ARM/ARM.td
@@ -31,11 +31,13 @@ def ArchV6      : SubtargetFeature<"v6", "ARMArchVersion", "V6",
 def ArchV7A     : SubtargetFeature<"v7a", "ARMArchVersion", "V7A",
                                    "ARM v7A">;
 def FeatureVFP2 : SubtargetFeature<"vfp2", "ARMFPUType", "VFPv2",
-                                   "Enable VFP2 instructions ">;
+                                   "Enable VFP2 instructions">;
 def FeatureVFP3 : SubtargetFeature<"vfp3", "ARMFPUType", "VFPv3",
-                                   "Enable VFP3 instructions ">;
+                                   "Enable VFP3 instructions">;
 def FeatureNEON : SubtargetFeature<"neon", "ARMFPUType", "NEON",
-                                   "Enable NEON instructions ">;
+                                   "Enable NEON instructions">;
+def FeatureThumb2 : SubtargetFeature<"thumb2", "ThumbMode", "Thumb2",
+                                     "Enable Thumb2 instructions">;
 
 //===----------------------------------------------------------------------===//
 // ARM Processors supported.
@@ -90,8 +92,11 @@ def : Proc<"arm1176jzf-s",    [ArchV6, FeatureVFP2]>;
 def : Proc<"mpcorenovfp",     [ArchV6]>;
 def : Proc<"mpcore",          [ArchV6, FeatureVFP2]>;
 
-def : Proc<"cortex-a8",       [ArchV7A, FeatureNEON]>;
-def : Proc<"cortex-a9",       [ArchV7A, FeatureNEON]>;
+def : Proc<"arm1156t2-s",     [ArchV6, FeatureThumb2]>;
+def : Proc<"arm1156t2f-s",    [ArchV6, FeatureThumb2, FeatureVFP2]>;
+
+def : Proc<"cortex-a8",       [ArchV7A, FeatureThumb2, FeatureNEON]>;
+def : Proc<"cortex-a9",       [ArchV7A, FeatureThumb2, FeatureNEON]>;
 
 //===----------------------------------------------------------------------===//
 // Register File Description
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index d2e4c34..680e772 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -90,11 +90,12 @@ def ARMeh_sjlj_setjmp: SDNode<"ARMISD::EH_SJLJ_SETJMP", SDT_ARMEH_SJLJ_Setjmp>;
 //===----------------------------------------------------------------------===//
 // ARM Instruction Predicate Definitions.
 //
-def HasV5T  : Predicate<"Subtarget->hasV5TOps()">;
-def HasV5TE : Predicate<"Subtarget->hasV5TEOps()">;
-def HasV6   : Predicate<"Subtarget->hasV6Ops()">;
-def IsThumb : Predicate<"Subtarget->isThumb()">;
-def IsARM   : Predicate<"!Subtarget->isThumb()">;
+def HasV5T   : Predicate<"Subtarget->hasV5TOps()">;
+def HasV5TE  : Predicate<"Subtarget->hasV5TEOps()">;
+def HasV6    : Predicate<"Subtarget->hasV6Ops()">;
+def IsThumb  : Predicate<"Subtarget->isThumb()">;
+def IsThumb2 : Predicate<"Subtarget->isThumb2()">;
+def IsARM    : Predicate<"!Subtarget->isThumb()">;
 
 //===----------------------------------------------------------------------===//
 // ARM Flag Definitions.
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
new file mode 100644
index 0000000..168fb45
--- /dev/null
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -0,0 +1,12 @@
+//===- ARMInstrThumb2.td - Thumb2 support for ARM -------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file describes the Thumb2 instruction set.
+//
+//===----------------------------------------------------------------------===//
diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp
index edeea2e..96daca8 100644
--- a/lib/Target/ARM/ARMSubtarget.cpp
+++ b/lib/Target/ARM/ARMSubtarget.cpp
@@ -16,10 +16,11 @@
 #include "llvm/Module.h"
 using namespace llvm;
 
-ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS, bool thumb)
+ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS,
+                           bool isThumb)
   : ARMArchVersion(V4T)
   , ARMFPUType(None)
-  , IsThumb(thumb)
+  , ThumbMode((isThumb ? Thumb1 : ThumbNone))
   , UseThumbBacktraces(false)
   , IsR9Reserved(false)
   , stackAlignment(4)
@@ -36,19 +37,26 @@ ARMSubtarget::ARMSubtarget(const Module &M, const std::string &FS, bool thumb)
   const std::string& TT = M.getTargetTriple();
   unsigned Len = TT.length();
   unsigned Idx = 0;
+
   if (Len >= 5 && TT.substr(0, 4) == "armv")
     Idx = 4;
   else if (Len >= 6 && TT.substr(0, 6) == "thumb") {
-    IsThumb = true;
+    isThumb = true;
     if (Len >= 7 && TT[5] == 'v')
       Idx = 6;
   }
   if (Idx) {
     unsigned SubVer = TT[Idx];
     if (SubVer > '4' && SubVer <= '9') {
-      if (SubVer >= '6')
+      if (SubVer >= '7') {
+        ARMArchVersion = V7A;
+        if (isThumb)
+          ThumbMode = Thumb2;
+      } else if (SubVer == '6') {
         ARMArchVersion = V6;
-      else if (SubVer == '5') {
+        if (isThumb && Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == '2')
+          ThumbMode = Thumb2;
+      } else if (SubVer == '5') {
         ARMArchVersion = V5T;
         if (Len >= Idx+3 && TT[Idx+1] == 't' && TT[Idx+2] == 'e')
           ARMArchVersion = V5TE;
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
index 39e85b0..370817d 100644
--- a/lib/Target/ARM/ARMSubtarget.h
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -30,15 +30,21 @@ protected:
     None, VFPv2, VFPv3, NEON
   };
 
+  enum ThumbTypeEnum {
+    ThumbNone,
+    Thumb1,
+    Thumb2
+  };
+
   /// ARMArchVersion - ARM architecture version: V4T (base), V5T, V5TE,
-  /// V6, V7A.
+  /// V6, V6T2, V7A.
   ARMArchEnum ARMArchVersion;
 
   /// ARMFPUType - Floating Point Unit type.
   ARMFPEnum ARMFPUType;
 
-  /// IsThumb - True if we are in thumb mode, false if in ARM mode.
-  bool IsThumb;
+  /// ThumbMode - ARM if in ARM mode, otherwise indicates Thumb version.
+  ThumbTypeEnum ThumbMode;
 
   /// UseThumbBacktraces - True if we use thumb style backtraces.
   bool UseThumbBacktraces;
@@ -66,7 +72,7 @@ protected:
   /// This constructor initializes the data members to match that
   /// of the specified module.
   ///
-  ARMSubtarget(const Module &M, const std::string &FS, bool thumb);
+  ARMSubtarget(const Module &M, const std::string &FS, bool isThumb);
 
   /// getMaxInlineSizeThreshold - Returns the maximum memset / memcpy size
   /// that still makes it profitable to inline the call.
@@ -96,7 +102,8 @@ protected:
   bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; }
   bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; }
 
-  bool isThumb() const { return IsThumb; }
+  bool isThumb() const { return ThumbMode >= Thumb1; }
+  bool isThumb2() const { return ThumbMode >= Thumb2; }
 
   bool useThumbBacktraces() const { return UseThumbBacktraces; }
   bool isR9Reserved() const { return IsR9Reserved; }