Change TargetLowering::getRegClassFor to take an MVT, instead of EVT.

Accordingly, add helper funtions getSimpleValueType (in parallel to
getValueType) in SDValue, SDNode, and TargetLowering.

This is the first, in a series of patches.

This is the second attempt. In the first attempt (r169837), a few
getSimpleVT() were hoisted too far, detected by bootstrap failures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170104 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index c3a5e64..fcf5b75 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -178,24 +178,24 @@
     bool isLoadTypeLegal(Type *Ty, MVT &VT);
     bool ARMEmitCmp(const Value *Src1Value, const Value *Src2Value,
                     bool isZExt);
-    bool ARMEmitLoad(EVT VT, unsigned &ResultReg, Address &Addr,
+    bool ARMEmitLoad(MVT VT, unsigned &ResultReg, Address &Addr,
                      unsigned Alignment = 0, bool isZExt = true,
                      bool allocReg = true);
-    bool ARMEmitStore(EVT VT, unsigned SrcReg, Address &Addr,
+    bool ARMEmitStore(MVT VT, unsigned SrcReg, Address &Addr,
                       unsigned Alignment = 0);
     bool ARMComputeAddress(const Value *Obj, Address &Addr);
     void ARMSimplifyAddress(Address &Addr, EVT VT, bool useAM3);
     bool ARMIsMemCpySmall(uint64_t Len);
     bool ARMTryEmitSmallMemCpy(Address Dest, Address Src, uint64_t Len,
                                unsigned Alignment);
-    unsigned ARMEmitIntExt(EVT SrcVT, unsigned SrcReg, EVT DestVT, bool isZExt);
-    unsigned ARMMaterializeFP(const ConstantFP *CFP, EVT VT);
-    unsigned ARMMaterializeInt(const Constant *C, EVT VT);
-    unsigned ARMMaterializeGV(const GlobalValue *GV, EVT VT);
-    unsigned ARMMoveToFPReg(EVT VT, unsigned SrcReg);
-    unsigned ARMMoveToIntReg(EVT VT, unsigned SrcReg);
+    unsigned ARMEmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT, bool isZExt);
+    unsigned ARMMaterializeFP(const ConstantFP *CFP, MVT VT);
+    unsigned ARMMaterializeInt(const Constant *C, MVT VT);
+    unsigned ARMMaterializeGV(const GlobalValue *GV, MVT VT);
+    unsigned ARMMoveToFPReg(MVT VT, unsigned SrcReg);
+    unsigned ARMMoveToIntReg(MVT VT, unsigned SrcReg);
     unsigned ARMSelectCallOp(bool UseReg);
-    unsigned ARMLowerPICELF(const GlobalValue *GV, unsigned Align, EVT VT);
+    unsigned ARMLowerPICELF(const GlobalValue *GV, unsigned Align, MVT VT);
 
     // Call handling routines.
   private:
@@ -487,7 +487,7 @@
 
 // TODO: Don't worry about 64-bit now, but when this is fixed remove the
 // checks from the various callers.
-unsigned ARMFastISel::ARMMoveToFPReg(EVT VT, unsigned SrcReg) {
+unsigned ARMFastISel::ARMMoveToFPReg(MVT VT, unsigned SrcReg) {
   if (VT == MVT::f64) return 0;
 
   unsigned MoveReg = createResultReg(TLI.getRegClassFor(VT));
@@ -497,7 +497,7 @@
   return MoveReg;
 }
 
-unsigned ARMFastISel::ARMMoveToIntReg(EVT VT, unsigned SrcReg) {
+unsigned ARMFastISel::ARMMoveToIntReg(MVT VT, unsigned SrcReg) {
   if (VT == MVT::i64) return 0;
 
   unsigned MoveReg = createResultReg(TLI.getRegClassFor(VT));
@@ -510,7 +510,7 @@
 // For double width floating point we need to materialize two constants
 // (the high and the low) into integer registers then use a move to get
 // the combined constant into an FP reg.
-unsigned ARMFastISel::ARMMaterializeFP(const ConstantFP *CFP, EVT VT) {
+unsigned ARMFastISel::ARMMaterializeFP(const ConstantFP *CFP, MVT VT) {
   const APFloat Val = CFP->getValueAPF();
   bool is64bit = VT == MVT::f64;
 
@@ -554,7 +554,7 @@
   return DestReg;
 }
 
-unsigned ARMFastISel::ARMMaterializeInt(const Constant *C, EVT VT) {
+unsigned ARMFastISel::ARMMaterializeInt(const Constant *C, MVT VT) {
 
   if (VT != MVT::i32 && VT != MVT::i16 && VT != MVT::i8 && VT != MVT::i1)
     return false;
@@ -616,7 +616,7 @@
   return DestReg;
 }
 
-unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, EVT VT) {
+unsigned ARMFastISel::ARMMaterializeGV(const GlobalValue *GV, MVT VT) {
   // For now 32-bit only.
   if (VT != MVT::i32) return 0;
 
@@ -719,10 +719,7 @@
 }
 
 unsigned ARMFastISel::TargetMaterializeConstant(const Constant *C) {
-  EVT VT = TLI.getValueType(C->getType(), true);
-
-  // Only handle simple types.
-  if (!VT.isSimple()) return 0;
+  MVT VT = TLI.getSimpleValueType(C->getType(), true);
 
   if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C))
     return ARMMaterializeFP(CFP, VT);
@@ -1003,14 +1000,13 @@
   AddOptionalDefs(MIB);
 }
 
-bool ARMFastISel::ARMEmitLoad(EVT VT, unsigned &ResultReg, Address &Addr,
+bool ARMFastISel::ARMEmitLoad(MVT VT, unsigned &ResultReg, Address &Addr,
                               unsigned Alignment, bool isZExt, bool allocReg) {
-  assert(VT.isSimple() && "Non-simple types are invalid here!");
   unsigned Opc;
   bool useAM3 = false;
   bool needVMOV = false;
   const TargetRegisterClass *RC;
-  switch (VT.getSimpleVT().SimpleTy) {
+  switch (VT.SimpleTy) {
     // This is mostly going to be Neon/vector support.
     default: return false;
     case MVT::i1:
@@ -1127,11 +1123,11 @@
   return true;
 }
 
-bool ARMFastISel::ARMEmitStore(EVT VT, unsigned SrcReg, Address &Addr,
+bool ARMFastISel::ARMEmitStore(MVT VT, unsigned SrcReg, Address &Addr,
                                unsigned Alignment) {
   unsigned StrOpc;
   bool useAM3 = false;
-  switch (VT.getSimpleVT().SimpleTy) {
+  switch (VT.SimpleTy) {
     // This is mostly going to be Neon/vector support.
     default: return false;
     case MVT::i1: {
@@ -1405,8 +1401,7 @@
 bool ARMFastISel::ARMEmitCmp(const Value *Src1Value, const Value *Src2Value,
                              bool isZExt) {
   Type *Ty = Src1Value->getType();
-  EVT SrcVT = TLI.getValueType(Ty, true);
-  if (!SrcVT.isSimple()) return false;
+  MVT SrcVT = TLI.getSimpleValueType(Ty, true);
 
   bool isFloat = (Ty->isFloatTy() || Ty->isDoubleTy());
   if (isFloat && !Subtarget->hasVFP2())
@@ -1443,7 +1438,7 @@
   unsigned CmpOpc;
   bool isICmp = true;
   bool needsExt = false;
-  switch (SrcVT.getSimpleVT().SimpleTy) {
+  switch (SrcVT.SimpleTy) {
     default: return false;
     // TODO: Verify compares.
     case MVT::f32:
@@ -1595,7 +1590,7 @@
     return false;
 
   Value *Src = I->getOperand(0);
-  EVT SrcVT = TLI.getValueType(Src->getType(), true);
+  MVT SrcVT = TLI.getSimpleValueType(Src->getType(), true);
   if (SrcVT != MVT::i32 && SrcVT != MVT::i16 && SrcVT != MVT::i8)
     return false;
 
@@ -1604,7 +1599,7 @@
 
   // Handle sign-extension.
   if (SrcVT == MVT::i16 || SrcVT == MVT::i8) {
-    EVT DestVT = MVT::i32;
+    MVT DestVT = MVT::i32;
     SrcReg = ARMEmitIntExt(SrcVT, SrcReg, DestVT,
                                        /*isZExt*/!isSigned);
     if (SrcReg == 0) return false;
@@ -1811,7 +1806,7 @@
 }
 
 bool ARMFastISel::SelectBinaryFPOp(const Instruction *I, unsigned ISDOpcode) {
-  EVT VT  = TLI.getValueType(I->getType(), true);
+  MVT VT  = TLI.getSimpleValueType(I->getType(), true);
 
   // We can get here in the case when we want to use NEON for our fp
   // operations, but can't figure out how to. Just use the vfp instructions
@@ -2055,7 +2050,7 @@
     if (RVLocs.size() == 2 && RetVT == MVT::f64) {
       // For this move we copy into two registers and then move into the
       // double fp reg we want.
-      EVT DestVT = RVLocs[0].getValVT();
+      MVT DestVT = RVLocs[0].getValVT();
       const TargetRegisterClass* DstRC = TLI.getRegClassFor(DestVT);
       unsigned ResultReg = createResultReg(DstRC);
       AddOptionalDefs(BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
@@ -2070,7 +2065,7 @@
       UpdateValueMap(I, ResultReg);
     } else {
       assert(RVLocs.size() == 1 &&"Can't handle non-double multi-reg retvals!");
-      EVT CopyVT = RVLocs[0].getValVT();
+      MVT CopyVT = RVLocs[0].getValVT();
 
       // Special handling for extended integers.
       if (RetVT == MVT::i1 || RetVT == MVT::i8 || RetVT == MVT::i16)
@@ -2129,8 +2124,8 @@
       return false;
 
     unsigned SrcReg = Reg + VA.getValNo();
-    EVT RVVT = TLI.getValueType(RV->getType());
-    EVT DestVT = VA.getValVT();
+    MVT RVVT = TLI.getSimpleValueType(RV->getType());
+    MVT DestVT = VA.getValVT();
     // Special handling for extended integers.
     if (RVVT != DestVT) {
       if (RVVT != MVT::i1 && RVVT != MVT::i8 && RVVT != MVT::i16)
@@ -2175,7 +2170,7 @@
 unsigned ARMFastISel::getLibcallReg(const Twine &Name) {
   GlobalValue *GV = new GlobalVariable(Type::getInt32Ty(*Context), false,
                                        GlobalValue::ExternalLinkage, 0, Name);
-  return ARMMaterializeGV(GV, TLI.getValueType(GV->getType()));
+  return ARMMaterializeGV(GV, TLI.getSimpleValueType(GV->getType()));
 }
 
 // A quick function that will emit a call for a named libcall in F with the
@@ -2587,7 +2582,7 @@
   return true;
 }
 
-unsigned ARMFastISel::ARMEmitIntExt(EVT SrcVT, unsigned SrcReg, EVT DestVT,
+unsigned ARMFastISel::ARMEmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT,
                                     bool isZExt) {
   if (DestVT != MVT::i32 && DestVT != MVT::i16 && DestVT != MVT::i8)
     return 0;
@@ -2595,8 +2590,7 @@
   unsigned Opc;
   bool isBoolZext = false;
   const TargetRegisterClass *RC = TLI.getRegClassFor(MVT::i32);
-  if (!SrcVT.isSimple()) return 0;
-  switch (SrcVT.getSimpleVT().SimpleTy) {
+  switch (SrcVT.SimpleTy) {
   default: return 0;
   case MVT::i16:
     if (!Subtarget->hasV6Ops()) return 0;
@@ -2643,9 +2637,9 @@
   Value *Src = I->getOperand(0);
   Type *SrcTy = Src->getType();
 
-  EVT SrcVT, DestVT;
-  SrcVT = TLI.getValueType(SrcTy, true);
-  DestVT = TLI.getValueType(DestTy, true);
+  MVT SrcVT, DestVT;
+  SrcVT = TLI.getSimpleValueType(SrcTy, true);
+  DestVT = TLI.getSimpleValueType(DestTy, true);
 
   bool isZExt = isa<ZExtInst>(I);
   unsigned SrcReg = getRegForValue(Src);
@@ -2830,7 +2824,7 @@
 }
 
 unsigned ARMFastISel::ARMLowerPICELF(const GlobalValue *GV,
-                                     unsigned Align, EVT VT) {
+                                     unsigned Align, MVT VT) {
   bool UseGOTOFF = GV->hasLocalLinkage() || GV->hasHiddenVisibility();
   ARMConstantPoolConstant *CPV =
     ARMConstantPoolConstant::Create(GV, UseGOTOFF ? ARMCP::GOTOFF : ARMCP::GOT);
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index b0c81ca..67a9998 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -1046,7 +1046,7 @@
 
 /// getRegClassFor - Return the register class that should be used for the
 /// specified value type.
-const TargetRegisterClass *ARMTargetLowering::getRegClassFor(EVT VT) const {
+const TargetRegisterClass *ARMTargetLowering::getRegClassFor(MVT VT) const {
   // Map v4i64 to QQ registers but do not make the type legal. Similarly map
   // v8i64 to QQQQ registers. v4i64 and v8i64 are only used for REG_SEQUENCE to
   // load / store 4 to 8 consecutive D registers.
diff --git a/lib/Target/ARM/ARMISelLowering.h b/lib/Target/ARM/ARMISelLowering.h
index 4c8bd0e..fa0e5e4 100644
--- a/lib/Target/ARM/ARMISelLowering.h
+++ b/lib/Target/ARM/ARMISelLowering.h
@@ -367,7 +367,7 @@
 
     /// getRegClassFor - Return the register class that should be used for the
     /// specified value type.
-    virtual const TargetRegisterClass *getRegClassFor(EVT VT) const;
+    virtual const TargetRegisterClass *getRegClassFor(MVT VT) const;
 
     /// getMaximalGlobalOffset - Returns the maximal possible offset which can
     /// be used for loads / stores from the global.
diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp
index f9a4d4a..34eb4a6 100644
--- a/lib/Target/Mips/MipsISelLowering.cpp
+++ b/lib/Target/Mips/MipsISelLowering.cpp
@@ -2155,7 +2155,7 @@
 
   MachineFunction &MF = DAG.getMachineFunction();
   MachineFrameInfo *MFI = MF.getFrameInfo();
-  EVT VT = Op.getValueType();
+  MVT VT = Op.getSimpleValueType();
   unsigned RA = IsN64 ? Mips::RA_64 : Mips::RA;
   MFI->setReturnAddressIsTaken(true);
 
@@ -3661,7 +3661,7 @@
     return;
 
   // Copy arg registers.
-  EVT RegTy = MVT::getIntegerVT(CC.regSize() * 8);
+  MVT RegTy = MVT::getIntegerVT(CC.regSize() * 8);
   const TargetRegisterClass *RC = getRegClassFor(RegTy);
 
   for (unsigned I = 0; I < ByVal.NumRegs; ++I) {
@@ -3783,7 +3783,7 @@
   const CCState &CCInfo = CC.getCCInfo();
   unsigned Idx = CCInfo.getFirstUnallocated(ArgRegs, NumRegs);
   unsigned RegSize = CC.regSize();
-  EVT RegTy = MVT::getIntegerVT(RegSize * 8);
+  MVT RegTy = MVT::getIntegerVT(RegSize * 8);
   const TargetRegisterClass *RC = getRegClassFor(RegTy);
   MachineFunction &MF = DAG.getMachineFunction();
   MachineFrameInfo *MFI = MF.getFrameInfo();