1 files changed, 22 insertions, 35 deletions

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index a5f635e..375d394 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -93,11 +93,11 @@ class ARMFastISel final : public FastISel {
     explicit ARMFastISel(FunctionLoweringInfo &funcInfo,
                          const TargetLibraryInfo *libInfo)
         : FastISel(funcInfo, libInfo),
+          Subtarget(
+              &static_cast<const ARMSubtarget &>(funcInfo.MF->getSubtarget())),
           M(const_cast<Module &>(*funcInfo.Fn->getParent())),
-          TM(funcInfo.MF->getTarget()),
-          TII(*TM.getSubtargetImpl()->getInstrInfo()),
-          TLI(*TM.getSubtargetImpl()->getTargetLowering()) {
-      Subtarget = &TM.getSubtarget<ARMSubtarget>();
+          TM(funcInfo.MF->getTarget()), TII(*Subtarget->getInstrInfo()),
+          TLI(*Subtarget->getTargetLowering()) {
       AFI = funcInfo.MF->getInfo<ARMFunctionInfo>();
       isThumb2 = AFI->isThumbFunction();
       Context = &funcInfo.Fn->getContext();
@@ -189,9 +189,7 @@ class ARMFastISel final : public FastISel {
     unsigned ARMSelectCallOp(bool UseReg);
     unsigned ARMLowerPICELF(const GlobalValue *GV, unsigned Align, MVT VT);
 
-    const TargetLowering *getTargetLowering() {
-      return TM.getSubtargetImpl()->getTargetLowering();
-    }
+    const TargetLowering *getTargetLowering() { return &TLI; }
 
     // Call handling routines.
   private:
@@ -586,9 +584,8 @@ unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
 
   Reloc::Model RelocM = TM.getRelocationModel();
   bool IsIndirect = Subtarget->GVIsIndirectSymbol(GV, RelocM);
-  const TargetRegisterClass *RC = isThumb2 ?
-    (const TargetRegisterClass*)&ARM::rGPRRegClass :
-    (const TargetRegisterClass*)&ARM::GPRRegClass;
+  const TargetRegisterClass *RC = isThumb2 ? &ARM::rGPRRegClass
+                                           : &ARM::GPRRegClass;
   unsigned DestReg = createResultReg(RC);
 
   // FastISel TLS support on non-MachO is broken, punt to SelectionDAG.
@@ -893,9 +890,8 @@ void ARMFastISel::ARMSimplifyAddress(Address &Addr, MVT VT, bool useAM3) {
   // put the alloca address into a register, set the base type back to
   // register and continue. This should almost never happen.
   if (needsLowering && Addr.BaseType == Address::FrameIndexBase) {
-    const TargetRegisterClass *RC = isThumb2 ?
-      (const TargetRegisterClass*)&ARM::tGPRRegClass :
-      (const TargetRegisterClass*)&ARM::GPRRegClass;
+    const TargetRegisterClass *RC = isThumb2 ? &ARM::tGPRRegClass
+                                             : &ARM::GPRRegClass;
     unsigned ResultReg = createResultReg(RC);
     unsigned Opc = isThumb2 ? ARM::t2ADDri : ARM::ADDri;
     AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
@@ -1094,9 +1090,8 @@ bool ARMFastISel::ARMEmitStore(MVT VT, unsigned SrcReg, Address &Addr,
     // This is mostly going to be Neon/vector support.
     default: return false;
     case MVT::i1: {
-      unsigned Res = createResultReg(isThumb2 ?
-        (const TargetRegisterClass*)&ARM::tGPRRegClass :
-        (const TargetRegisterClass*)&ARM::GPRRegClass);
+      unsigned Res = createResultReg(isThumb2 ? &ARM::tGPRRegClass
+                                              : &ARM::GPRRegClass);
       unsigned Opc = isThumb2 ? ARM::t2ANDri : ARM::ANDri;
       SrcReg = constrainOperandRegClass(TII.get(Opc), SrcReg, 1);
       AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DbgLoc,
@@ -1500,9 +1495,8 @@ bool ARMFastISel::SelectCmp(const Instruction *I) {
   // Now set a register based on the comparison. Explicitly set the predicates
   // here.
   unsigned MovCCOpc = isThumb2 ? ARM::t2MOVCCi : ARM::MOVCCi;
-  const TargetRegisterClass *RC = isThumb2 ?
-    (const TargetRegisterClass*)&ARM::rGPRRegClass :
-    (const TargetRegisterClass*)&ARM::GPRRegClass;
+  const TargetRegisterClass *RC = isThumb2 ? &ARM::rGPRRegClass
+                                           : &ARM::GPRRegClass;
   unsigned DestReg = createResultReg(RC);
   Constant *Zero = ConstantInt::get(Type::getInt32Ty(*Context), 0);
   unsigned ZeroReg = fastMaterializeConstant(Zero);
@@ -2490,19 +2484,12 @@ bool ARMFastISel::SelectIntrinsicCall(const IntrinsicInst &I) {
     MachineFrameInfo *MFI = FuncInfo.MF->getFrameInfo();
     MFI->setFrameAddressIsTaken(true);
 
-    unsigned LdrOpc;
-    const TargetRegisterClass *RC;
-    if (isThumb2) {
-      LdrOpc =  ARM::t2LDRi12;
-      RC = (const TargetRegisterClass*)&ARM::tGPRRegClass;
-    } else {
-      LdrOpc =  ARM::LDRi12;
-      RC = (const TargetRegisterClass*)&ARM::GPRRegClass;
-    }
+    unsigned LdrOpc = isThumb2 ? ARM::t2LDRi12 : ARM::LDRi12;
+    const TargetRegisterClass *RC = isThumb2 ? &ARM::tGPRRegClass
+                                             : &ARM::GPRRegClass;
 
     const ARMBaseRegisterInfo *RegInfo =
-        static_cast<const ARMBaseRegisterInfo *>(
-            TM.getSubtargetImpl()->getRegisterInfo());
+        static_cast<const ARMBaseRegisterInfo *>(Subtarget->getRegisterInfo());
     unsigned FramePtr = RegInfo->getFrameRegister(*(FuncInfo.MF));
     unsigned SrcReg = FramePtr;
 
@@ -3075,13 +3062,13 @@ namespace llvm {
   FastISel *ARM::createFastISel(FunctionLoweringInfo &funcInfo,
                                 const TargetLibraryInfo *libInfo) {
     const TargetMachine &TM = funcInfo.MF->getTarget();
-
-    const ARMSubtarget *Subtarget = &TM.getSubtarget<ARMSubtarget>();
+    const ARMSubtarget &STI =
+        static_cast<const ARMSubtarget &>(funcInfo.MF->getSubtarget());
     // Thumb2 support on iOS; ARM support on iOS, Linux and NaCl.
     bool UseFastISel = false;
-    UseFastISel |= Subtarget->isTargetMachO() && !Subtarget->isThumb1Only();
-    UseFastISel |= Subtarget->isTargetLinux() && !Subtarget->isThumb();
-    UseFastISel |= Subtarget->isTargetNaCl() && !Subtarget->isThumb();
+    UseFastISel |= STI.isTargetMachO() && !STI.isThumb1Only();
+    UseFastISel |= STI.isTargetLinux() && !STI.isThumb();
+    UseFastISel |= STI.isTargetNaCl() && !STI.isThumb();
 
     if (UseFastISel) {
       // iOS always has a FP for backtracking, force other targets