[llvm-commits] [llvm] r57358 - /llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp
Anton Korobeynikov
asl at math.spbu.ru
Fri Oct 10 13:27:37 PDT 2008
Author: asl
Date: Fri Oct 10 15:27:31 2008
New Revision: 57358
URL: http://llvm.org/viewvc/llvm-project?rev=57358&view=rev
Log:
Cleanup
Modified:
llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp
Modified: llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp?rev=57358&r1=57357&r2=57358&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/Sparc/SparcISelLowering.cpp Fri Oct 10 15:27:31 2008
@@ -35,13 +35,13 @@
SmallVector<CCValAssign, 16> RVLocs;
unsigned CC = DAG.getMachineFunction().getFunction()->getCallingConv();
bool isVarArg = DAG.getMachineFunction().getFunction()->isVarArg();
-
+
// CCState - Info about the registers and stack slot.
CCState CCInfo(CC, isVarArg, DAG.getTarget(), RVLocs);
-
+
// Analize return values of ISD::RET
CCInfo.AnalyzeReturn(Op.getNode(), 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()) {
@@ -49,7 +49,7 @@
if (RVLocs[i].isRegLoc())
DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
}
-
+
SDValue Chain = Op.getOperand(0);
SDValue Flag;
@@ -57,15 +57,15 @@
for (unsigned i = 0; i != RVLocs.size(); ++i) {
CCValAssign &VA = RVLocs[i];
assert(VA.isRegLoc() && "Can only return in registers!");
-
+
// ISD::RET => ret chain, (regnum1,val1), ...
// So i*2+1 index only the regnums.
Chain = DAG.getCopyToReg(Chain, VA.getLocReg(), Op.getOperand(i*2+1), Flag);
-
+
// Guarantee that all emitted copies are stuck together with flags.
Flag = Chain.getValue(1);
}
-
+
if (Flag.getNode())
return DAG.getNode(SPISD::RET_FLAG, MVT::Other, Chain, Flag);
return DAG.getNode(SPISD::RET_FLAG, MVT::Other, Chain);
@@ -79,20 +79,20 @@
SmallVectorImpl<SDValue> &ArgValues) {
MachineFunction &MF = DAG.getMachineFunction();
MachineRegisterInfo &RegInfo = MF.getRegInfo();
-
+
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;
-
+
SDValue Root = DAG.getRoot();
std::vector<SDValue> OutChains;
for (Function::arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E; ++I) {
MVT ObjectVT = getValueType(I->getType());
-
+
switch (ObjectVT.getSimpleVT()) {
default: assert(0 && "Unhandled argument type!");
case MVT::i1:
@@ -108,7 +108,7 @@
SDValue Arg = DAG.getCopyFromReg(Root, VReg, MVT::i32);
if (ObjectVT != MVT::i32) {
unsigned AssertOp = ISD::AssertSext;
- Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
+ Arg = DAG.getNode(AssertOp, MVT::i32, Arg,
DAG.getValueType(ObjectVT));
Arg = DAG.getNode(ISD::TRUNCATE, ObjectVT, Arg);
}
@@ -132,7 +132,7 @@
}
ArgValues.push_back(Load);
}
-
+
ArgOffset += 4;
break;
case MVT::f32:
@@ -173,7 +173,7 @@
SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
HiVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
}
-
+
SDValue LoVal;
if (CurArgReg < ArgRegEnd) { // Lives in an incoming GPR
unsigned VRegLo = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
@@ -184,27 +184,27 @@
SDValue FIPtr = DAG.getFrameIndex(FrameIdx, MVT::i32);
LoVal = DAG.getLoad(MVT::i32, Root, FIPtr, NULL, 0);
}
-
+
// Compose the two halves together into an i64 unit.
- SDValue WholeValue =
+ SDValue WholeValue =
DAG.getNode(ISD::BUILD_PAIR, MVT::i64, LoVal, HiVal);
-
+
// If we want a double, do a bit convert.
if (ObjectVT == MVT::f64)
WholeValue = DAG.getNode(ISD::BIT_CONVERT, MVT::f64, WholeValue);
-
+
ArgValues.push_back(WholeValue);
}
ArgOffset += 8;
break;
}
}
-
+
// Store remaining ArgRegs to the stack if this is a varargs function.
if (F.isVarArg()) {
// Remember the vararg offset for the va_start implementation.
VarArgsFrameOffset = ArgOffset;
-
+
for (; CurArgReg != ArgRegEnd; ++CurArgReg) {
unsigned VReg = RegInfo.createVirtualRegister(&SP::IntRegsRegClass);
MF.getRegInfo().addLiveIn(*CurArgReg, VReg);
@@ -217,7 +217,7 @@
ArgOffset += 4;
}
}
-
+
if (!OutChains.empty())
DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other,
&OutChains[0], OutChains.size()));
@@ -235,13 +235,13 @@
SmallVector<CCValAssign, 16> ArgLocs;
CCState CCInfo(CallingConv, isVarArg, DAG.getTarget(), ArgLocs);
CCInfo.AnalyzeCallOperands(Op.getNode(), 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 = TheCall->getNumArgs(); i != e; ++i) {
@@ -264,21 +264,21 @@
ArgsSize -= 4*6; // Space for first 6 arguments is prereserved.
else
ArgsSize = 0;
-#endif
-
+#endif
+
// Keep stack frames 8-byte aligned.
ArgsSize = (ArgsSize+7) & ~7;
Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(ArgsSize));
-
+
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];
-
+
// Arguments start after the 5 first operands of ISD::CALL
SDValue Arg = TheCall->getArg(i);
@@ -296,16 +296,16 @@
Arg = DAG.getNode(ISD::ANY_EXTEND, VA.getLocVT(), Arg);
break;
}
-
- // Arguments that can be passed on register must be kept at
+
+ // 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.
@@ -313,8 +313,8 @@
PtrOff = DAG.getNode(ISD::ADD, MVT::i32, StackPtr, PtrOff);
MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
}
-
-#else
+
+#else
static const unsigned ArgRegs[] = {
SP::I0, SP::I1, SP::I2, SP::I3, SP::I4, SP::I5
};
@@ -357,14 +357,14 @@
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, MVT::i32, Val,
+ SDValue Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, MVT::i32, Val,
DAG.getConstant(1, MVT::i32));
SDValue Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, 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;
@@ -374,7 +374,7 @@
}
break;
}
-
+
if (ValToStore.getNode()) {
SDValue StackPtr = DAG.getRegister(SP::O6, MVT::i32);
SDValue PtrOff = DAG.getConstant(ArgOffset, MVT::i32);
@@ -384,13 +384,13 @@
ArgOffset += ObjSize;
}
#endif
-
+
// Emit all stores, make sure the occur before any copies into physregs.
if (!MemOpChains.empty())
Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
&MemOpChains[0], MemOpChains.size());
-
- // Build a sequence of copy-to-reg nodes chained together with token
+
+ // 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.
@@ -419,33 +419,33 @@
SDValue Ops[] = { Chain, Callee, InFlag };
Chain = DAG.getNode(SPISD::CALL, NodeTys, Ops, InFlag.getNode() ? 3 : 2);
InFlag = Chain.getValue(1);
-
+
Chain = DAG.getCALLSEQ_END(Chain,
DAG.getConstant(ArgsSize, MVT::i32),
DAG.getConstant(0, MVT::i32), InFlag);
InFlag = Chain.getValue(1);
-
+
// Assign locations to each value returned by this call.
SmallVector<CCValAssign, 16> RVLocs;
CCState RVInfo(CallingConv, isVarArg, DAG.getTarget(), RVLocs);
-
+
RVInfo.AnalyzeCallResult(TheCall, RetCC_Sparc32);
SmallVector<SDValue, 8> ResultVals;
-
+
// 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, Reg,
RVLocs[i].getValVT(), InFlag).getValue(1);
InFlag = Chain.getValue(2);
ResultVals.push_back(Chain.getValue(0));
}
-
+
ResultVals.push_back(Chain);
// Merge everything together with a MERGE_VALUES node.
@@ -508,7 +508,7 @@
SparcTargetLowering::SparcTargetLowering(TargetMachine &TM)
: TargetLowering(TM) {
-
+
// Set up the register classes.
addRegisterClass(MVT::i32, SP::IntRegsRegisterClass);
addRegisterClass(MVT::f32, SP::FPRegsRegisterClass);
@@ -525,7 +525,7 @@
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);
@@ -544,10 +544,10 @@
// 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);
@@ -555,7 +555,7 @@
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);
@@ -563,11 +563,11 @@
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);
@@ -594,7 +594,7 @@
// FIXME: Sparc provides these multiplies, but we don't have them yet.
setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
-
+
// We don't have line number support yet.
setOperationAction(ISD::DBG_STOPPOINT, MVT::Other, Expand);
setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
@@ -608,11 +608,11 @@
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::STACKSAVE , MVT::Other, Expand);
setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Custom);
@@ -621,12 +621,12 @@
setOperationAction(ISD::DBG_LABEL, MVT::Other, Expand);
setOperationAction(ISD::EH_LABEL, MVT::Other, Expand);
setOperationAction(ISD::DECLARE, MVT::Other, Expand);
-
+
setStackPointerRegisterToSaveRestore(SP::O6);
if (TM.getSubtarget<SparcSubtarget>().isV9())
setOperationAction(ISD::CTPOP, MVT::i32, Legal);
-
+
computeRegisterProperties();
}
@@ -653,13 +653,13 @@
/// combiner.
void SparcTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
const APInt &Mask,
- APInt &KnownZero,
+ 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:
@@ -668,9 +668,9 @@
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?");
-
+ 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;
@@ -684,7 +684,7 @@
ISD::CondCode CC, unsigned &SPCC) {
if (isa<ConstantSDNode>(RHS) &&
cast<ConstantSDNode>(RHS)->getZExtValue() == 0 &&
- CC == ISD::SETNE &&
+ CC == ISD::SETNE &&
((LHS.getOpcode() == SPISD::SELECT_ICC &&
LHS.getOperand(3).getOpcode() == SPISD::CMPICC) ||
(LHS.getOpcode() == SPISD::SELECT_FCC &&
@@ -738,11 +738,11 @@
SDValue RHS = Op.getOperand(3);
SDValue Dest = Op.getOperand(4);
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) {
@@ -769,11 +769,11 @@
SDValue TrueVal = Op.getOperand(2);
SDValue FalseVal = Op.getOperand(3);
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<MVT> VTs;
@@ -788,7 +788,7 @@
Opc = SPISD::SELECT_FCC;
if (SPCC == ~0U) SPCC = FPCondCCodeToFCC(CC);
}
- return DAG.getNode(Opc, TrueVal.getValueType(), TrueVal, FalseVal,
+ return DAG.getNode(Opc, TrueVal.getValueType(), TrueVal, FalseVal,
DAG.getConstant(SPCC, MVT::i32), CompareFlag);
}
@@ -812,7 +812,7 @@
const Value *SV = cast<SrcValueSDNode>(Node->getOperand(2))->getValue();
SDValue VAList = DAG.getLoad(MVT::i32, InChain, VAListPtr, SV, 0);
// Increment the pointer, VAList, to the next vaarg
- SDValue NextPtr = DAG.getNode(ISD::ADD, MVT::i32, VAList,
+ SDValue NextPtr = DAG.getNode(ISD::ADD, MVT::i32, VAList,
DAG.getConstant(VT.getSizeInBits()/8,
MVT::i32));
// Store the incremented VAList to the legalized pointer
@@ -822,10 +822,10 @@
// f64 load.
if (VT != MVT::f64)
return DAG.getLoad(VT, InChain, VAList, NULL, 0);
-
+
// Otherwise, load it as i64, then do a bitconvert.
SDValue V = DAG.getLoad(MVT::i64, InChain, VAList, NULL, 0);
-
+
// Bit-Convert the value to f64.
SDValue Ops[2] = {
DAG.getNode(ISD::BIT_CONVERT, MVT::f64, V),
@@ -837,12 +837,12 @@
static SDValue LowerDYNAMIC_STACKALLOC(SDValue Op, SelectionDAG &DAG) {
SDValue Chain = Op.getOperand(0); // Legalize the chain.
SDValue Size = Op.getOperand(1); // Legalize the size.
-
+
unsigned SPReg = SP::O6;
SDValue SP = DAG.getCopyFromReg(Chain, SPReg, MVT::i32);
SDValue NewSP = DAG.getNode(ISD::SUB, MVT::i32, SP, Size); // Value
Chain = DAG.getCopyToReg(SP.getValue(1), 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, MVT::i32, NewSP,
@@ -897,7 +897,7 @@
}
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
@@ -905,7 +905,7 @@
const BasicBlock *LLVM_BB = BB->getBasicBlock();
MachineFunction::iterator It = BB;
++It;
-
+
// thisMBB:
// ...
// TrueVal = ...
@@ -924,15 +924,15 @@
// 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 ]
// ...
@@ -940,8 +940,7 @@
BuildMI(BB, 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;
}
-
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