Check in LLVM r95781.
diff --git a/lib/Target/Sparc/SparcISelLowering.cpp b/lib/Target/Sparc/SparcISelLowering.cpp
new file mode 100644
index 0000000..e67002a
--- /dev/null
+++ b/lib/Target/Sparc/SparcISelLowering.cpp
@@ -0,0 +1,1090 @@
+//===-- SparcISelLowering.cpp - Sparc DAG Lowering Implementation ---------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the interfaces that Sparc uses to lower LLVM code into a
+// selection DAG.
+//
+//===----------------------------------------------------------------------===//
+
+#include "SparcISelLowering.h"
+#include "SparcTargetMachine.h"
+#include "llvm/Function.h"
+#include "llvm/CodeGen/CallingConvLower.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/SelectionDAG.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/ADT/VectorExtras.h"
+#include "llvm/Support/ErrorHandling.h"
+using namespace llvm;
+
+
+//===----------------------------------------------------------------------===//
+// Calling Convention Implementation
+//===----------------------------------------------------------------------===//
+
+#include "SparcGenCallingConv.inc"
+
+SDValue
+SparcTargetLowering::LowerReturn(SDValue Chain,
+ CallingConv::ID CallConv, bool isVarArg,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ DebugLoc dl, SelectionDAG &DAG) {
+
+ // CCValAssign - represent the assignment of the return value to locations.
+ SmallVector<CCValAssign, 16> RVLocs;
+
+ // CCState - Info about the registers and stack slot.
+ CCState CCInfo(CallConv, isVarArg, DAG.getTarget(),
+ RVLocs, *DAG.getContext());
+
+ // Analize return values.
+ CCInfo.AnalyzeReturn(Outs, RetCC_Sparc32);
+
+ // If this is the first return lowered for this function, add the regs to the
+ // liveout set for the function.
+ if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
+ for (unsigned i = 0; i != RVLocs.size(); ++i)
+ if (RVLocs[i].isRegLoc())
+ DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
+ }
+
+ SDValue Flag;
+
+ // Copy the result values into the output registers.
+ for (unsigned i = 0; i != RVLocs.size(); ++i) {
+ CCValAssign &VA = RVLocs[i];
+ assert(VA.isRegLoc() && "Can only return in registers!");
+
+ Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
+ Outs[i].Val, Flag);
+
+ // Guarantee that all emitted copies are stuck together with flags.
+ Flag = Chain.getValue(1);
+ }
+
+ if (Flag.getNode())
+ return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
+ return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain);
+}
+
+/// LowerFormalArguments - V8 uses a very simple ABI, where all values are
+/// passed in either one or two GPRs, including FP values. TODO: we should
+/// pass FP values in FP registers for fastcc functions.
+SDValue
+SparcTargetLowering::LowerFormalArguments(SDValue Chain,
+ CallingConv::ID CallConv, bool isVarArg,
+ const SmallVectorImpl<ISD::InputArg>
+ &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals) {
+
+ MachineFunction &MF = DAG.getMachineFunction();
+ MachineRegisterInfo &RegInfo = MF.getRegInfo();
+
+ // Assign locations to all of the incoming arguments.
+ SmallVector<CCValAssign, 16> ArgLocs;
+ CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
+ ArgLocs, *DAG.getContext());
+ CCInfo.AnalyzeFormalArguments(Ins, CC_Sparc32);
+
+ static const unsigned ArgRegs[] = {
+ SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
+ };
+ const unsigned *CurArgReg = ArgRegs, *ArgRegEnd = ArgRegs+6;
+ unsigned ArgOffset = 68;
+
+ for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
+ SDValue ArgValue;
+ CCValAssign &VA = ArgLocs[i];
+ // FIXME: We ignore the register assignments of AnalyzeFormalArguments
+ // because it doesn't know how to split a double into two i32 registers.
+ EVT ObjectVT = VA.getValVT();
+ switch (ObjectVT.getSimpleVT().SimpleTy) {
+ default: llvm_unreachable("Unhandled argument type!");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ if (!Ins[i].Used) { // Argument is dead.
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ InVals.push_back(DAG.getUNDEF(ObjectVT));
+ } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
+ MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
+ SDValue Arg = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
+ if (ObjectVT != MVT::i32) {
+ unsigned AssertOp = ISD::AssertSext;
+ Arg = DAG.getNode(AssertOp, dl, MVT::i32, Arg,
+ DAG.getValueType(ObjectVT));
+ Arg = DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, Arg);
+ }
+ InVals.push_back(Arg);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
+ true, false);
+ SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ SDValue Load;
+ if (ObjectVT == MVT::i32) {
+ Load = DAG.getLoad(MVT::i32, dl, Chain, FIPtr, NULL, 0);
+ } else {
+ ISD::LoadExtType LoadOp = ISD::SEXTLOAD;
+
+ // Sparc is big endian, so add an offset based on the ObjectVT.
+ unsigned Offset = 4-std::max(1U, ObjectVT.getSizeInBits()/8);
+ FIPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, FIPtr,
+ DAG.getConstant(Offset, MVT::i32));
+ Load = DAG.getExtLoad(LoadOp, dl, MVT::i32, Chain, FIPtr,
+ NULL, 0, ObjectVT);
+ Load = DAG.getNode(ISD::TRUNCATE, dl, ObjectVT, Load);
+ }
+ InVals.push_back(Load);
+ }
+
+ ArgOffset += 4;
+ break;
+ case MVT::f32:
+ if (!Ins[i].Used) { // Argument is dead.
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ InVals.push_back(DAG.getUNDEF(ObjectVT));
+ } else if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ // FP value is passed in an integer register.
+ unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
+ MF.getRegInfo().addLiveIn(*CurArgReg++, VReg);
+ SDValue Arg = DAG.getCopyFromReg(Chain, dl, VReg, MVT::i32);
+
+ Arg = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Arg);
+ InVals.push_back(Arg);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
+ true, false);
+ SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ SDValue Load = DAG.getLoad(MVT::f32, dl, Chain, FIPtr, NULL, 0);
+ InVals.push_back(Load);
+ }
+ ArgOffset += 4;
+ break;
+
+ case MVT::i64:
+ case MVT::f64:
+ if (!Ins[i].Used) { // Argument is dead.
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ if (CurArgReg < ArgRegEnd) ++CurArgReg;
+ InVals.push_back(DAG.getUNDEF(ObjectVT));
+ } else {
+ SDValue HiVal;
+ if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ unsigned VRegHi = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
+ MF.getRegInfo().addLiveIn(*CurArgReg++, VRegHi);
+ HiVal = DAG.getCopyFromReg(Chain, dl, VRegHi, MVT::i32);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
+ true, false);
+ SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ HiVal = DAG.getLoad(MVT::i32, dl, Chain, FIPtr, NULL, 0);
+ }
+
+ SDValue LoVal;
+ if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
+ unsigned VRegLo = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
+ MF.getRegInfo().addLiveIn(*CurArgReg++, VRegLo);
+ LoVal = DAG.getCopyFromReg(Chain, dl, VRegLo, MVT::i32);
+ } else {
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset+4,
+ true, false);
+ SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+ LoVal = DAG.getLoad(MVT::i32, dl, Chain, FIPtr, NULL, 0);
+ }
+
+ // Compose the two halves together into an i64 unit.
+ SDValue WholeValue =
+ DAG.getNode(ISD::BUILD_PAIR, dl, MVT::i64, LoVal, HiVal);
+
+ // If we want a double, do a bit convert.
+ if (ObjectVT == MVT::f64)
+ WholeValue = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, WholeValue);
+
+ InVals.push_back(WholeValue);
+ }
+ ArgOffset += 8;
+ break;
+ }
+ }
+
+ // Store remaining ArgRegs to the stack if this is a varargs function.
+ if (isVarArg) {
+ // Remember the vararg offset for the va_start implementation.
+ VarArgsFrameOffset = ArgOffset;
+
+ std::vector<SDValue> OutChains;
+
+ for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
+ unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
+ MF.getRegInfo().addLiveIn(*CurArgReg, VReg);
+ SDValue Arg = DAG.getCopyFromReg(DAG.getRoot(), dl, VReg, MVT::i32);
+
+ int FrameIdx = MF.getFrameInfo()->CreateFixedObject(4, ArgOffset,
+ true, false);
+ SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
+
+ OutChains.push_back(DAG.getStore(DAG.getRoot(), dl, Arg, FIPtr, NULL, 0));
+ ArgOffset += 4;
+ }
+
+ if (!OutChains.empty()) {
+ OutChains.push_back(Chain);
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
+ &OutChains[0], OutChains.size());
+ }
+ }
+
+ return Chain;
+}
+
+SDValue
+SparcTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
+ CallingConv::ID CallConv, bool isVarArg,
+ bool &isTailCall,
+ const SmallVectorImpl<ISD::OutputArg> &Outs,
+ const SmallVectorImpl<ISD::InputArg> &Ins,
+ DebugLoc dl, SelectionDAG &DAG,
+ SmallVectorImpl<SDValue> &InVals) {
+ // Sparc target does not yet support tail call optimization.
+ isTailCall = false;
+
+#if 0
+ // Analyze operands of the call, assigning locations to each operand.
+ SmallVector<CCValAssign, 16> ArgLocs;
+ CCState CCInfo(CallConv, isVarArg, DAG.getTarget(), ArgLocs);
+ CCInfo.AnalyzeCallOperands(Outs, CC_Sparc32);
+
+ // Get the size of the outgoing arguments stack space requirement.
+ unsigned ArgsSize = CCInfo.getNextStackOffset();
+ // FIXME: We can't use this until f64 is known to take two GPRs.
+#else
+ (void)CC_Sparc32;
+
+ // Count the size of the outgoing arguments.
+ unsigned ArgsSize = 0;
+ for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
+ switch (Outs[i].Val.getValueType().getSimpleVT().SimpleTy) {
+ default: llvm_unreachable("Unknown value type!");
+ case MVT::i1:
+ case MVT::i8:
+ case MVT::i16:
+ case MVT::i32:
+ case MVT::f32:
+ ArgsSize += 4;
+ break;
+ case MVT::i64:
+ case MVT::f64:
+ ArgsSize += 8;
+ break;
+ }
+ }
+ if (ArgsSize > 4*6)
+ ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
+ else
+ ArgsSize = 0;
+#endif
+
+ // Keep stack frames 8-byte aligned.
+ ArgsSize = (ArgsSize+7) & ~7;
+
+ Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(ArgsSize, true));
+
+ SmallVector<std::pair<unsigned, SDValue>, 8> RegsToPass;
+ SmallVector<SDValue, 8> MemOpChains;
+
+#if 0
+ // Walk the register/memloc assignments, inserting copies/loads.
+ for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
+ CCValAssign &VA = ArgLocs[i];
+ SDValue Arg = Outs[i].Val;
+
+ // Promote the value if needed.
+ switch (VA.getLocInfo()) {
+ default: llvm_unreachable("Unknown loc info!");
+ case CCValAssign::Full: break;
+ case CCValAssign::SExt:
+ Arg = DAG.getNode(ISD::SIGN_EXTEND, VA.getLocVT(), Arg);
+ break;
+ case CCValAssign::ZExt:
+ Arg = DAG.getNode(ISD::ZERO_EXTEND, VA.getLocVT(), Arg);
+ break;
+ case CCValAssign::AExt:
+ Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
+ break;
+ }
+
+ // Arguments that can be passed on register must be kept at
+ // RegsToPass vector
+ if (VA.isRegLoc()) {
+ RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
+ continue;
+ }
+
+ assert(VA.isMemLoc());
+
+ // Create a store off the stack pointer for this argument.
+ SDValue StackPtr = DAG.getRegister(SP::O6, MVT::i32);
+ // FIXME: VERIFY THAT 68 IS RIGHT.
+ SDValue PtrOff = DAG.getIntPtrConstant(VA.getLocMemOffset()+68);
+ PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
+ MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
+ }
+
+#else
+ static const unsigned ArgRegs[] = {
+ SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
+ };
+ unsigned ArgOffset = 68;
+
+ for (unsigned i = 0, e = Outs.size(); i != e; ++i) {
+ SDValue Val = Outs[i].Val;
+ EVT ObjectVT = Val.getValueType();
+ SDValue ValToStore(0, 0);
+ unsigned ObjSize;
+ switch (ObjectVT.getSimpleVT().SimpleTy) {
+ default: llvm_unreachable("Unhandled argument type!");
+ case MVT::i32:
+ ObjSize = 4;
+
+ if (RegsToPass.size() >= 6) {
+ ValToStore = Val;
+ } else {
+ RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Val));
+ }
+ break;
+ case MVT::f32:
+ ObjSize = 4;
+ if (RegsToPass.size() >= 6) {
+ ValToStore = Val;
+ } else {
+ // Convert this to a FP value in an int reg.
+ Val = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Val);
+ RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Val));
+ }
+ break;
+ case MVT::f64: {
+ ObjSize = 8;
+ if (RegsToPass.size() >= 6) {
+ ValToStore = Val; // Whole thing is passed in memory.
+ break;
+ }
+
+ // Break into top and bottom parts by storing to the stack and loading
+ // out the parts as integers. Top part goes in a reg.
+ SDValue StackPtr = DAG.CreateStackTemporary(MVT::f64, MVT::i32);
+ SDValue Store = DAG.getStore(DAG.getEntryNode(), dl,
+ Val, StackPtr, NULL, 0);
+ // Sparc is big-endian, so the high part comes first.
+ SDValue Hi = DAG.getLoad(MVT::i32, dl, Store, StackPtr, NULL, 0, 0);
+ // Increment the pointer to the other half.
+ StackPtr = DAG.getNode(ISD::ADD, dl, StackPtr.getValueType(), StackPtr,
+ DAG.getIntPtrConstant(4));
+ // Load the low part.
+ SDValue Lo = DAG.getLoad(MVT::i32, dl, Store, StackPtr, NULL, 0, 0);
+
+ RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Hi));
+
+ if (RegsToPass.size() >= 6) {
+ ValToStore = Lo;
+ ArgOffset += 4;
+ ObjSize = 4;
+ } else {
+ RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Lo));
+ }
+ break;
+ }
+ case MVT::i64: {
+ ObjSize = 8;
+ if (RegsToPass.size() >= 6) {
+ ValToStore = Val; // Whole thing is passed in memory.
+ break;
+ }
+
+ // Split the value into top and bottom part. Top part goes in a reg.
+ SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Val,
+ DAG.getConstant(1, MVT::i32));
+ SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, MVT::i32, Val,
+ DAG.getConstant(0, MVT::i32));
+ RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Hi));
+
+ if (RegsToPass.size() >= 6) {
+ ValToStore = Lo;
+ ArgOffset += 4;
+ ObjSize = 4;
+ } else {
+ RegsToPass.push_back(std::make_pair(ArgRegs[RegsToPass.size()], Lo));
+ }
+ break;
+ }
+ }
+
+ if (ValToStore.getNode()) {
+ SDValue StackPtr = DAG.getRegister(SP::O6, MVT::i32);
+ SDValue PtrOff = DAG.getConstant(ArgOffset, MVT::i32);
+ PtrOff = DAG.getNode(ISD::ADD, dl, MVT::i32, StackPtr, PtrOff);
+ MemOpChains.push_back(DAG.getStore(Chain, dl, ValToStore,
+ PtrOff, NULL, 0));
+ }
+ ArgOffset += ObjSize;
+ }
+#endif
+
+ // Emit all stores, make sure the occur before any copies into physregs.
+ if (!MemOpChains.empty())
+ Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
+ &MemOpChains[0], MemOpChains.size());
+
+ // Build a sequence of copy-to-reg nodes chained together with token
+ // chain and flag operands which copy the outgoing args into registers.
+ // The InFlag in necessary since all emited instructions must be
+ // stuck together.
+ SDValue InFlag;
+ for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
+ unsigned Reg = RegsToPass[i].first;
+ // Remap I0->I7 -> O0->O7.
+ if (Reg >= SP::I0 && Reg <= SP::I7)
+ Reg = Reg-SP::I0+SP::O0;
+
+ Chain = DAG.getCopyToReg(Chain, dl, Reg, RegsToPass[i].second, InFlag);
+ InFlag = Chain.getValue(1);
+ }
+
+ // If the callee is a GlobalAddress node (quite common, every direct call is)
+ // turn it into a TargetGlobalAddress node so that legalize doesn't hack it.
+ // Likewise ExternalSymbol -> TargetExternalSymbol.
+ if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
+ Callee = DAG.getTargetGlobalAddress(G->getGlobal(), MVT::i32);
+ else if (ExternalSymbolSDNode *E = dyn_cast<ExternalSymbolSDNode>(Callee))
+ Callee = DAG.getTargetExternalSymbol(E->getSymbol(), MVT::i32);
+
+ std::vector<EVT> NodeTys;
+ NodeTys.push_back(MVT::Other); // Returns a chain
+ NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
+ SDValue Ops[] = { Chain, Callee, InFlag };
+ Chain = DAG.getNode(SPISD::CALL, dl, NodeTys, Ops, InFlag.getNode() ? 3 : 2);
+ InFlag = Chain.getValue(1);
+
+ Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(ArgsSize, true),
+ DAG.getIntPtrConstant(0, true), InFlag);
+ InFlag = Chain.getValue(1);
+
+ // Assign locations to each value returned by this call.
+ SmallVector<CCValAssign, 16> RVLocs;
+ CCState RVInfo(CallConv, isVarArg, DAG.getTarget(),
+ RVLocs, *DAG.getContext());
+
+ RVInfo.AnalyzeCallResult(Ins, RetCC_Sparc32);
+
+ // Copy all of the result registers out of their specified physreg.
+ for (unsigned i = 0; i != RVLocs.size(); ++i) {
+ unsigned Reg = RVLocs[i].getLocReg();
+
+ // Remap I0->I7 -> O0->O7.
+ if (Reg >= SP::I0 && Reg <= SP::I7)
+ Reg = Reg-SP::I0+SP::O0;
+
+ Chain = DAG.getCopyFromReg(Chain, dl, Reg,
+ RVLocs[i].getValVT(), InFlag).getValue(1);
+ InFlag = Chain.getValue(2);
+ InVals.push_back(Chain.getValue(0));
+ }
+
+ return Chain;
+}
+
+
+
+//===----------------------------------------------------------------------===//
+// TargetLowering Implementation
+//===----------------------------------------------------------------------===//
+
+/// IntCondCCodeToICC - Convert a DAG integer condition code to a SPARC ICC
+/// condition.
+static SPCC::CondCodes IntCondCCodeToICC(ISD::CondCode CC) {
+ switch (CC) {
+ default: llvm_unreachable("Unknown integer condition code!");
+ case ISD::SETEQ: return SPCC::ICC_E;
+ case ISD::SETNE: return SPCC::ICC_NE;
+ case ISD::SETLT: return SPCC::ICC_L;
+ case ISD::SETGT: return SPCC::ICC_G;
+ case ISD::SETLE: return SPCC::ICC_LE;
+ case ISD::SETGE: return SPCC::ICC_GE;
+ case ISD::SETULT: return SPCC::ICC_CS;
+ case ISD::SETULE: return SPCC::ICC_LEU;
+ case ISD::SETUGT: return SPCC::ICC_GU;
+ case ISD::SETUGE: return SPCC::ICC_CC;
+ }
+}
+
+/// FPCondCCodeToFCC - Convert a DAG floatingp oint condition code to a SPARC
+/// FCC condition.
+static SPCC::CondCodes FPCondCCodeToFCC(ISD::CondCode CC) {
+ switch (CC) {
+ default: llvm_unreachable("Unknown fp condition code!");
+ case ISD::SETEQ:
+ case ISD::SETOEQ: return SPCC::FCC_E;
+ case ISD::SETNE:
+ case ISD::SETUNE: return SPCC::FCC_NE;
+ case ISD::SETLT:
+ case ISD::SETOLT: return SPCC::FCC_L;
+ case ISD::SETGT:
+ case ISD::SETOGT: return SPCC::FCC_G;
+ case ISD::SETLE:
+ case ISD::SETOLE: return SPCC::FCC_LE;
+ case ISD::SETGE:
+ case ISD::SETOGE: return SPCC::FCC_GE;
+ case ISD::SETULT: return SPCC::FCC_UL;
+ case ISD::SETULE: return SPCC::FCC_ULE;
+ case ISD::SETUGT: return SPCC::FCC_UG;
+ case ISD::SETUGE: return SPCC::FCC_UGE;
+ case ISD::SETUO: return SPCC::FCC_U;
+ case ISD::SETO: return SPCC::FCC_O;
+ case ISD::SETONE: return SPCC::FCC_LG;
+ case ISD::SETUEQ: return SPCC::FCC_UE;
+ }
+}
+
+SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
+ : TargetLowering(TM, new TargetLoweringObjectFileELF()) {
+
+ // Set up the register classes.
+ addRegisterClass(MVT::i32, SP::IntRegsRegisterClass);
+ addRegisterClass(MVT::f32, SP::FPRegsRegisterClass);
+ addRegisterClass(MVT::f64, SP::DFPRegsRegisterClass);
+
+ // Turn FP extload into load/fextend
+ setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
+ // Sparc doesn't have i1 sign extending load
+ setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
+ // Turn FP truncstore into trunc + store.
+ setTruncStoreAction(MVT::f64, MVT::f32, Expand);
+
+ // Custom legalize GlobalAddress nodes into LO/HI parts.
+ setOperationAction(ISD::GlobalAddress, MVT::i32, Custom);
+ setOperationAction(ISD::GlobalTLSAddress, MVT::i32, Custom);
+ setOperationAction(ISD::ConstantPool , MVT::i32, Custom);
+
+ // Sparc doesn't have sext_inreg, replace them with shl/sra
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i8 , Expand);
+ setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1 , Expand);
+
+ // Sparc has no REM or DIVREM operations.
+ setOperationAction(ISD::UREM, MVT::i32, Expand);
+ setOperationAction(ISD::SREM, MVT::i32, Expand);
+ setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
+ setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
+
+ // Custom expand fp<->sint
+ setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
+ setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
+
+ // Expand fp<->uint
+ setOperationAction(ISD::FP_TO_UINT, MVT::i32, Expand);
+ setOperationAction(ISD::UINT_TO_FP, MVT::i32, Expand);
+
+ setOperationAction(ISD::BIT_CONVERT, MVT::f32, Expand);
+ setOperationAction(ISD::BIT_CONVERT, MVT::i32, Expand);
+
+ // Sparc has no select or setcc: expand to SELECT_CC.
+ setOperationAction(ISD::SELECT, MVT::i32, Expand);
+ setOperationAction(ISD::SELECT, MVT::f32, Expand);
+ setOperationAction(ISD::SELECT, MVT::f64, Expand);
+ setOperationAction(ISD::SETCC, MVT::i32, Expand);
+ setOperationAction(ISD::SETCC, MVT::f32, Expand);
+ setOperationAction(ISD::SETCC, MVT::f64, Expand);
+
+ // Sparc doesn't have BRCOND either, it has BR_CC.
+ setOperationAction(ISD::BRCOND, MVT::Other, Expand);
+ setOperationAction(ISD::BRIND, MVT::Other, Expand);
+ setOperationAction(ISD::BR_JT, MVT::Other, Expand);
+ setOperationAction(ISD::BR_CC, MVT::i32, Custom);
+ setOperationAction(ISD::BR_CC, MVT::f32, Custom);
+ setOperationAction(ISD::BR_CC, MVT::f64, Custom);
+
+ setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
+ setOperationAction(ISD::SELECT_CC, MVT::f32, Custom);
+ setOperationAction(ISD::SELECT_CC, MVT::f64, Custom);
+
+ // SPARC has no intrinsics for these particular operations.
+ setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
+
+ setOperationAction(ISD::FSIN , MVT::f64, Expand);
+ setOperationAction(ISD::FCOS , MVT::f64, Expand);
+ setOperationAction(ISD::FREM , MVT::f64, Expand);
+ setOperationAction(ISD::FSIN , MVT::f32, Expand);
+ setOperationAction(ISD::FCOS , MVT::f32, Expand);
+ setOperationAction(ISD::FREM , MVT::f32, Expand);
+ setOperationAction(ISD::CTPOP, MVT::i32, Expand);
+ setOperationAction(ISD::CTTZ , MVT::i32, Expand);
+ setOperationAction(ISD::CTLZ , MVT::i32, Expand);
+ setOperationAction(ISD::ROTL , MVT::i32, Expand);
+ setOperationAction(ISD::ROTR , MVT::i32, Expand);
+ setOperationAction(ISD::BSWAP, MVT::i32, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
+ setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
+ setOperationAction(ISD::FPOW , MVT::f64, Expand);
+ setOperationAction(ISD::FPOW , MVT::f32, Expand);
+
+ setOperationAction(ISD::SHL_PARTS, MVT::i32, Expand);
+ setOperationAction(ISD::SRA_PARTS, MVT::i32, Expand);
+ setOperationAction(ISD::SRL_PARTS, MVT::i32, Expand);
+
+ // FIXME: Sparc provides these multiplies, but we don't have them yet.
+ setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
+ setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
+
+ setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
+
+ // VASTART needs to be custom lowered to use the VarArgsFrameIndex.
+ setOperationAction(ISD::VASTART , MVT::Other, Custom);
+ // VAARG needs to be lowered to not do unaligned accesses for doubles.
+ setOperationAction(ISD::VAARG , MVT::Other, Custom);
+
+ // Use the default implementation.
+ setOperationAction(ISD::VACOPY , MVT::Other, Expand);
+ setOperationAction(ISD::VAEND , MVT::Other, Expand);
+ setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
+ setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
+ setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
+
+ // No debug info support yet.
+ setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
+
+ setStackPointerRegisterToSaveRestore(SP::O6);
+
+ if (TM.getSubtarget<SparcSubtarget>().isV9())
+ setOperationAction(ISD::CTPOP, MVT::i32, Legal);
+
+ computeRegisterProperties();
+}
+
+const char *SparcTargetLowering::getTargetNodeName(unsigned Opcode) const {
+ switch (Opcode) {
+ default: return 0;
+ case SPISD::CMPICC: return "SPISD::CMPICC";
+ case SPISD::CMPFCC: return "SPISD::CMPFCC";
+ case SPISD::BRICC: return "SPISD::BRICC";
+ case SPISD::BRFCC: return "SPISD::BRFCC";
+ case SPISD::SELECT_ICC: return "SPISD::SELECT_ICC";
+ case SPISD::SELECT_FCC: return "SPISD::SELECT_FCC";
+ case SPISD::Hi: return "SPISD::Hi";
+ case SPISD::Lo: return "SPISD::Lo";
+ case SPISD::FTOI: return "SPISD::FTOI";
+ case SPISD::ITOF: return "SPISD::ITOF";
+ case SPISD::CALL: return "SPISD::CALL";
+ case SPISD::RET_FLAG: return "SPISD::RET_FLAG";
+ }
+}
+
+/// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to
+/// be zero. Op is expected to be a target specific node. Used by DAG
+/// combiner.
+void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
+ const APInt &Mask,
+ APInt &KnownZero,
+ APInt &KnownOne,
+ const SelectionDAG &DAG,
+ unsigned Depth) const {
+ APInt KnownZero2, KnownOne2;
+ KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything.
+
+ switch (Op.getOpcode()) {
+ default: break;
+ case SPISD::SELECT_ICC:
+ case SPISD::SELECT_FCC:
+ DAG.ComputeMaskedBits(Op.getOperand(1), Mask, KnownZero, KnownOne,
+ Depth+1);
+ DAG.ComputeMaskedBits(Op.getOperand(0), Mask, KnownZero2, KnownOne2,
+ Depth+1);
+ assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?");
+ assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?");
+
+ // Only known if known in both the LHS and RHS.
+ KnownOne &= KnownOne2;
+ KnownZero &= KnownZero2;
+ break;
+ }
+}
+
+// Look at LHS/RHS/CC and see if they are a lowered setcc instruction. If so
+// set LHS/RHS and SPCC to the LHS/RHS of the setcc and SPCC to the condition.
+static void LookThroughSetCC(SDValue &LHS, SDValue &RHS,
+ ISD::CondCode CC, unsigned &SPCC) {
+ if (isa<ConstantSDNode>(RHS) &&
+ cast<ConstantSDNode>(RHS)->getZExtValue() == 0 &&
+ CC == ISD::SETNE &&
+ ((LHS.getOpcode() == SPISD::SELECT_ICC &&
+ LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
+ (LHS.getOpcode() == SPISD::SELECT_FCC &&
+ LHS.getOperand(3).getOpcode() == SPISD::CMPFCC)) &&
+ isa<ConstantSDNode>(LHS.getOperand(0)) &&
+ isa<ConstantSDNode>(LHS.getOperand(1)) &&
+ cast<ConstantSDNode>(LHS.getOperand(0))->getZExtValue() == 1 &&
+ cast<ConstantSDNode>(LHS.getOperand(1))->getZExtValue() == 0) {
+ SDValue CMPCC = LHS.getOperand(3);
+ SPCC = cast<ConstantSDNode>(LHS.getOperand(2))->getZExtValue();
+ LHS = CMPCC.getOperand(0);
+ RHS = CMPCC.getOperand(1);
+ }
+}
+
+SDValue SparcTargetLowering::LowerGlobalAddress(SDValue Op,
+ SelectionDAG &DAG) {
+ GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
+ // FIXME there isn't really any debug info here
+ DebugLoc dl = Op.getDebugLoc();
+ SDValue GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
+ SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, GA);
+ SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, GA);
+
+ if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
+ return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
+
+ SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
+ getPointerTy());
+ SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
+ SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
+ GlobalBase, RelAddr);
+ return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
+ AbsAddr, NULL, 0);
+}
+
+SDValue SparcTargetLowering::LowerConstantPool(SDValue Op,
+ SelectionDAG &DAG) {
+ ConstantPoolSDNode *N = cast<ConstantPoolSDNode>(Op);
+ // FIXME there isn't really any debug info here
+ DebugLoc dl = Op.getDebugLoc();
+ Constant *C = N->getConstVal();
+ SDValue CP = DAG.getTargetConstantPool(C, MVT::i32, N->getAlignment());
+ SDValue Hi = DAG.getNode(SPISD::Hi, dl, MVT::i32, CP);
+ SDValue Lo = DAG.getNode(SPISD::Lo, dl, MVT::i32, CP);
+ if (getTargetMachine().getRelocationModel() != Reloc::PIC_)
+ return DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
+
+ SDValue GlobalBase = DAG.getNode(SPISD::GLOBAL_BASE_REG, dl,
+ getPointerTy());
+ SDValue RelAddr = DAG.getNode(ISD::ADD, dl, MVT::i32, Lo, Hi);
+ SDValue AbsAddr = DAG.getNode(ISD::ADD, dl, MVT::i32,
+ GlobalBase, RelAddr);
+ return DAG.getLoad(getPointerTy(), dl, DAG.getEntryNode(),
+ AbsAddr, NULL, 0);
+}
+
+static SDValue LowerFP_TO_SINT(SDValue Op, SelectionDAG &DAG) {
+ DebugLoc dl = Op.getDebugLoc();
+ // Convert the fp value to integer in an FP register.
+ assert(Op.getValueType() == MVT::i32);
+ Op = DAG.getNode(SPISD::FTOI, dl, MVT::f32, Op.getOperand(0));
+ return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::i32, Op);
+}
+
+static SDValue LowerSINT_TO_FP(SDValue Op, SelectionDAG &DAG) {
+ DebugLoc dl = Op.getDebugLoc();
+ assert(Op.getOperand(0).getValueType() == MVT::i32);
+ SDValue Tmp = DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f32, Op.getOperand(0));
+ // Convert the int value to FP in an FP register.
+ return DAG.getNode(SPISD::ITOF, dl, Op.getValueType(), Tmp);
+}
+
+static SDValue LowerBR_CC(SDValue Op, SelectionDAG &DAG) {
+ SDValue Chain = Op.getOperand(0);
+ ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(1))->get();
+ SDValue LHS = Op.getOperand(2);
+ SDValue RHS = Op.getOperand(3);
+ SDValue Dest = Op.getOperand(4);
+ DebugLoc dl = Op.getDebugLoc();
+ unsigned Opc, SPCC = ~0U;
+
+ // If this is a br_cc of a "setcc", and if the setcc got lowered into
+ // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
+ LookThroughSetCC(LHS, RHS, CC, SPCC);
+
+ // Get the condition flag.
+ SDValue CompareFlag;
+ if (LHS.getValueType() == MVT::i32) {
+ std::vector<EVT> VTs;
+ VTs.push_back(MVT::i32);
+ VTs.push_back(MVT::Flag);
+ SDValue Ops[2] = { LHS, RHS };
+ CompareFlag = DAG.getNode(SPISD::CMPICC, dl, VTs, Ops, 2).getValue(1);
+ if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
+ Opc = SPISD::BRICC;
+ } else {
+ CompareFlag = DAG.getNode(SPISD::CMPFCC, dl, MVT::Flag, LHS, RHS);
+ if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
+ Opc = SPISD::BRFCC;
+ }
+ return DAG.getNode(Opc, dl, MVT::Other, Chain, Dest,
+ DAG.getConstant(SPCC, MVT::i32), CompareFlag);
+}
+
+static SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) {
+ SDValue LHS = Op.getOperand(0);
+ SDValue RHS = Op.getOperand(1);
+ ISD::CondCode CC = cast<CondCodeSDNode>(Op.getOperand(4))->get();
+ SDValue TrueVal = Op.getOperand(2);
+ SDValue FalseVal = Op.getOperand(3);
+ DebugLoc dl = Op.getDebugLoc();
+ unsigned Opc, SPCC = ~0U;
+
+ // If this is a select_cc of a "setcc", and if the setcc got lowered into
+ // an CMP[IF]CC/SELECT_[IF]CC pair, find the original compared values.
+ LookThroughSetCC(LHS, RHS, CC, SPCC);
+
+ SDValue CompareFlag;
+ if (LHS.getValueType() == MVT::i32) {
+ std::vector<EVT> VTs;
+ VTs.push_back(LHS.getValueType()); // subcc returns a value
+ VTs.push_back(MVT::Flag);
+ SDValue Ops[2] = { LHS, RHS };
+ CompareFlag = DAG.getNode(SPISD::CMPICC, dl, VTs, Ops, 2).getValue(1);
+ Opc = SPISD::SELECT_ICC;
+ if (SPCC == ~0U) SPCC = IntCondCCodeToICC(CC);
+ } else {
+ CompareFlag = DAG.getNode(SPISD::CMPFCC, dl, MVT::Flag, LHS, RHS);
+ Opc = SPISD::SELECT_FCC;
+ if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
+ }
+ return DAG.getNode(Opc, dl, TrueVal.getValueType(), TrueVal, FalseVal,
+ DAG.getConstant(SPCC, MVT::i32), CompareFlag);
+}
+
+static SDValue LowerVASTART(SDValue Op, SelectionDAG &DAG,
+ SparcTargetLowering &TLI) {
+ // vastart just stores the address of the VarArgsFrameIndex slot into the
+ // memory location argument.
+ DebugLoc dl = Op.getDebugLoc();
+ SDValue Offset = DAG.getNode(ISD::ADD, dl, MVT::i32,
+ DAG.getRegister(SP::I6, MVT::i32),
+ DAG.getConstant(TLI.getVarArgsFrameOffset(),
+ MVT::i32));
+ const Value *SV = cast<SrcValueSDNode>(Op.getOperand(2))->getValue();
+ return DAG.getStore(Op.getOperand(0), dl, Offset, Op.getOperand(1), SV, 0);
+}
+
+static SDValue LowerVAARG(SDValue Op, SelectionDAG &DAG) {
+ SDNode *Node = Op.getNode();
+ EVT VT = Node->getValueType(0);
+ SDValue InChain = Node->getOperand(0);
+ SDValue VAListPtr = Node->getOperand(1);
+ const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
+ DebugLoc dl = Node->getDebugLoc();
+ SDValue VAList = DAG.getLoad(MVT::i32, dl, InChain, VAListPtr, SV, 0);
+ // Increment the pointer, VAList, to the next vaarg
+ SDValue NextPtr = DAG.getNode(ISD::ADD, dl, MVT::i32, VAList,
+ DAG.getConstant(VT.getSizeInBits()/8,
+ MVT::i32));
+ // Store the incremented VAList to the legalized pointer
+ InChain = DAG.getStore(VAList.getValue(1), dl, NextPtr,
+ VAListPtr, SV, 0);
+ // Load the actual argument out of the pointer VAList, unless this is an
+ // f64 load.
+ if (VT != MVT::f64)
+ return DAG.getLoad(VT, dl, InChain, VAList, NULL, 0);
+
+ // Otherwise, load it as i64, then do a bitconvert.
+ SDValue V = DAG.getLoad(MVT::i64, dl, InChain, VAList, NULL, 0);
+
+ // Bit-Convert the value to f64.
+ SDValue Ops[2] = {
+ DAG.getNode(ISD::BIT_CONVERT, dl, MVT::f64, V),
+ V.getValue(1)
+ };
+ return DAG.getMergeValues(Ops, 2, dl);
+}
+
+static SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) {
+ SDValue Chain = Op.getOperand(0); // Legalize the chain.
+ SDValue Size = Op.getOperand(1); // Legalize the size.
+ DebugLoc dl = Op.getDebugLoc();
+
+ unsigned SPReg = SP::O6;
+ SDValue SP = DAG.getCopyFromReg(Chain, dl, SPReg, MVT::i32);
+ SDValue NewSP = DAG.getNode(ISD::SUB, dl, MVT::i32, SP, Size); // Value
+ Chain = DAG.getCopyToReg(SP.getValue(1), dl, SPReg, NewSP); // Output chain
+
+ // The resultant pointer is actually 16 words from the bottom of the stack,
+ // to provide a register spill area.
+ SDValue NewVal = DAG.getNode(ISD::ADD, dl, MVT::i32, NewSP,
+ DAG.getConstant(96, MVT::i32));
+ SDValue Ops[2] = { NewVal, Chain };
+ return DAG.getMergeValues(Ops, 2, dl);
+}
+
+
+SDValue SparcTargetLowering::
+LowerOperation(SDValue Op, SelectionDAG &DAG) {
+ switch (Op.getOpcode()) {
+ default: llvm_unreachable("Should not custom lower this!");
+ // Frame & Return address. Currently unimplemented
+ case ISD::RETURNADDR: return SDValue();
+ case ISD::FRAMEADDR: return SDValue();
+ case ISD::GlobalTLSAddress:
+ llvm_unreachable("TLS not implemented for Sparc.");
+ case ISD::GlobalAddress: return LowerGlobalAddress(Op, DAG);
+ case ISD::ConstantPool: return LowerConstantPool(Op, DAG);
+ case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
+ case ISD::SINT_TO_FP: return LowerSINT_TO_FP(Op, DAG);
+ case ISD::BR_CC: return LowerBR_CC(Op, DAG);
+ case ISD::SELECT_CC: return LowerSELECT_CC(Op, DAG);
+ case ISD::VASTART: return LowerVASTART(Op, DAG, *this);
+ case ISD::VAARG: return LowerVAARG(Op, DAG);
+ case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
+ }
+}
+
+MachineBasicBlock *
+SparcTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
+ MachineBasicBlock *BB,
+ DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const {
+ const TargetInstrInfo &TII = *getTargetMachine().getInstrInfo();
+ unsigned BROpcode;
+ unsigned CC;
+ DebugLoc dl = MI->getDebugLoc();
+ // Figure out the conditional branch opcode to use for this select_cc.
+ switch (MI->getOpcode()) {
+ default: llvm_unreachable("Unknown SELECT_CC!");
+ case SP::SELECT_CC_Int_ICC:
+ case SP::SELECT_CC_FP_ICC:
+ case SP::SELECT_CC_DFP_ICC:
+ BROpcode = SP::BCOND;
+ break;
+ case SP::SELECT_CC_Int_FCC:
+ case SP::SELECT_CC_FP_FCC:
+ case SP::SELECT_CC_DFP_FCC:
+ BROpcode = SP::FBCOND;
+ break;
+ }
+
+ CC = (SPCC::CondCodes)MI->getOperand(3).getImm();
+
+ // To "insert" a SELECT_CC instruction, we actually have to insert the diamond
+ // control-flow pattern. The incoming instruction knows the destination vreg
+ // to set, the condition code register to branch on, the true/false values to
+ // select between, and a branch opcode to use.
+ const BasicBlock *LLVM_BB = BB->getBasicBlock();
+ MachineFunction::iterator It = BB;
+ ++It;
+
+ // thisMBB:
+ // ...
+ // TrueVal = ...
+ // [f]bCC copy1MBB
+ // fallthrough --> copy0MBB
+ MachineBasicBlock *thisMBB = BB;
+ MachineFunction *F = BB->getParent();
+ MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
+ MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
+ BuildMI(BB, dl, TII.get(BROpcode)).addMBB(sinkMBB).addImm(CC);
+ F->insert(It, copy0MBB);
+ F->insert(It, sinkMBB);
+ // Update machine-CFG edges by first adding all successors of the current
+ // block to the new block which will contain the Phi node for the select.
+ // Also inform sdisel of the edge changes.
+ for (MachineBasicBlock::succ_iterator I = BB->succ_begin(),
+ E = BB->succ_end(); I != E; ++I) {
+ EM->insert(std::make_pair(*I, sinkMBB));
+ sinkMBB->addSuccessor(*I);
+ }
+ // Next, remove all successors of the current block, and add the true
+ // and fallthrough blocks as its successors.
+ while (!BB->succ_empty())
+ BB->removeSuccessor(BB->succ_begin());
+ // Next, add the true and fallthrough blocks as its successors.
+ BB->addSuccessor(copy0MBB);
+ BB->addSuccessor(sinkMBB);
+
+ // copy0MBB:
+ // %FalseValue = ...
+ // # fallthrough to sinkMBB
+ BB = copy0MBB;
+
+ // Update machine-CFG edges
+ BB->addSuccessor(sinkMBB);
+
+ // sinkMBB:
+ // %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
+ // ...
+ BB = sinkMBB;
+ BuildMI(BB, dl, TII.get(SP::PHI), MI->getOperand(0).getReg())
+ .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
+ .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
+
+ F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
+ return BB;
+}
+
+//===----------------------------------------------------------------------===//
+// Sparc Inline Assembly Support
+//===----------------------------------------------------------------------===//
+
+/// getConstraintType - Given a constraint letter, return the type of
+/// constraint it is for this target.
+SparcTargetLowering::ConstraintType
+SparcTargetLowering::getConstraintType(const std::string &Constraint) const {
+ if (Constraint.size() == 1) {
+ switch (Constraint[0]) {
+ default: break;
+ case 'r': return C_RegisterClass;
+ }
+ }
+
+ return TargetLowering::getConstraintType(Constraint);
+}
+
+std::pair<unsigned, const TargetRegisterClass*>
+SparcTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
+ EVT VT) const {
+ if (Constraint.size() == 1) {
+ switch (Constraint[0]) {
+ case 'r':
+ return std::make_pair(0U, SP::IntRegsRegisterClass);
+ }
+ }
+
+ return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
+}
+
+std::vector<unsigned> SparcTargetLowering::
+getRegClassForInlineAsmConstraint(const std::string &Constraint,
+ EVT VT) const {
+ if (Constraint.size() != 1)
+ return std::vector<unsigned>();
+
+ switch (Constraint[0]) {
+ default: break;
+ case 'r':
+ return make_vector<unsigned>(SP::L0, SP::L1, SP::L2, SP::L3,
+ SP::L4, SP::L5, SP::L6, SP::L7,
+ SP::I0, SP::I1, SP::I2, SP::I3,
+ SP::I4, SP::I5,
+ SP::O0, SP::O1, SP::O2, SP::O3,
+ SP::O4, SP::O5, SP::O7, 0);
+ }
+
+ return std::vector<unsigned>();
+}
+
+bool
+SparcTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
+ // The Sparc target isn't yet aware of offsets.
+ return false;
+}
+
+/// getFunctionAlignment - Return the Log2 alignment of this function.
+unsigned SparcTargetLowering::getFunctionAlignment(const Function *) const {
+ return 2;
+}