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Speculatively disable Dan's commits 143177 and 143179 to see if

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it fixes the dragonegg self-host (it looks like gcc is miscompiled).
Original commit messages:
Eliminate LegalizeOps' LegalizedNodes map and have it just call RAUW
on every node as it legalizes them. This makes it easier to use
hasOneUse() heuristics, since unneeded nodes can be removed from the
DAG earlier.

Make LegalizeOps visit the DAG in an operands-last order. It previously
used operands-first, because LegalizeTypes has to go operands-first, and
LegalizeTypes used to be part of LegalizeOps, but they're now split.
The operands-last order is more natural for several legalization tasks.
For example, it allows lowering code for nodes with floating-point or
vector constants to see those constants directly instead of seeing the
lowered form (often constant-pool loads). This makes some things
somewhat more complicated today, though it ought to allow things to be
simpler in the future. It also fixes some bugs exposed by Legalizing
using RAUW aggressively.

Remove the part of LegalizeOps that attempted to patch up invalid chain
operands on libcalls generated by LegalizeTypes, since it doesn't work
with the new LegalizeOps traversal order. Instead, define what
LegalizeTypes is doing to be correct, and transfer the responsibility
of keeping calls from having overlapping calling sequences into the
scheduler.

Teach the scheduler to model callseq_begin/end pairs as having a
physical register definition/use to prevent calls from having
overlapping calling sequences. This is also somewhat complicated, though
there are ways it might be simplified in the future.

This addresses rdar://9816668, rdar://10043614, rdar://8434668, and others.
Please direct high-level questions about this patch to management.

Delete #if 0 code accidentally left in.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143188 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2011-10-28 09:55:57 +00:00
parent 6a7efcfc02
commit 62c1d00dfd
18 changed files with 561 additions and 653 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

776
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

File diff suppressed because it is too large Load Diff

1
lib/CodeGen/SelectionDAG/LegalizeTypes.cpp
View File

@ -1084,6 +1084,7 @@ DAGTypeLegalizer::ExpandChainLibCall(RTLIB::Libcall LC,
SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
TLI.getPointerTy());
// Splice the libcall in wherever FindInputOutputChains tells us to.
Type *RetTy = Node->getValueType(0).getTypeForEVT(*DAG.getContext());
std::pair<SDValue, SDValue> CallInfo =
TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, false,

134
lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
View File

@ -386,90 +386,6 @@ void ScheduleDAGRRList::ReleasePred(SUnit *SU, const SDep *PredEdge) {
}
}
/// IsChainDependent - Test if Outer is reachable from Inner through
/// chain dependencies.
static bool IsChainDependent(SDNode *Outer, SDNode *Inner) {
SDNode *N = Outer;
for (;;) {
if (N == Inner)
return true;
if (N->getOpcode() == ISD::TokenFactor) {
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (IsChainDependent(N->getOperand(i).getNode(), Inner))
return true;
return false;
}
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (N->getOperand(i).getValueType() == MVT::Other) {
N = N->getOperand(i).getNode();
goto found_chain_operand;
}
return false;
found_chain_operand:;
if (N->getOpcode() == ISD::EntryToken)
return false;
}
}
/// FindCallSeqStart - Starting from the (lowered) CALLSEQ_END node, locate
/// the corresponding (lowered) CALLSEQ_BEGIN node.
///
/// NestLevel and MaxNested are used in recursion to indcate the current level
/// of nesting of CALLSEQ_BEGIN and CALLSEQ_END pairs, as well as the maximum
/// level seen so far.
///
/// TODO: It would be better to give CALLSEQ_END an explicit operand to point
/// to the corresponding CALLSEQ_BEGIN to avoid needing to search for it.
static SDNode *
FindCallSeqStart(SDNode *N, unsigned &NestLevel, unsigned &MaxNest,
const TargetInstrInfo *TII) {
for (;;) {
// For a TokenFactor, examine each operand. There may be multiple ways
// to get to the CALLSEQ_BEGIN, but we need to find the path with the
// most nesting in order to ensure that we find the corresponding match.
if (N->getOpcode() == ISD::TokenFactor) {
SDNode *Best = 0;
unsigned BestMaxNest = MaxNest;
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
unsigned MyNestLevel = NestLevel;
unsigned MyMaxNest = MaxNest;
if (SDNode *New = FindCallSeqStart(N->getOperand(i).getNode(),
MyNestLevel, MyMaxNest, TII))
if (!Best || (MyMaxNest > BestMaxNest)) {
Best = New;
BestMaxNest = MyMaxNest;
}
}
assert(Best);
MaxNest = BestMaxNest;
return Best;
}
// Check for a lowered CALLSEQ_BEGIN or CALLSEQ_END.
if (N->isMachineOpcode()) {
if (N->getMachineOpcode() ==
(unsigned)TII->getCallFrameDestroyOpcode()) {
++NestLevel;
MaxNest = std::max(MaxNest, NestLevel);
} else if (N->getMachineOpcode() ==
(unsigned)TII->getCallFrameSetupOpcode()) {
--NestLevel;
if (NestLevel == 0)
return N;
}
}
// Otherwise, find the chain and continue climbing.
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (N->getOperand(i).getValueType() == MVT::Other) {
N = N->getOperand(i).getNode();
goto found_chain_operand;
}
return 0;
found_chain_operand:;
if (N->getOpcode() == ISD::EntryToken)
return 0;
}
}
/// Call ReleasePred for each predecessor, then update register live def/gen.
/// Always update LiveRegDefs for a register dependence even if the current SU
/// also defines the register. This effectively create one large live range
@ -507,26 +423,6 @@ void ScheduleDAGRRList::ReleasePredecessors(SUnit *SU) {
}
}
}
// If we're scheduling a lowered CALLSEQ_END, find the corresponding CALLSEQ_BEGIN.
// Inject an artificial physical register dependence between these nodes, to
// prevent other calls from being interscheduled with them.
const TargetLowering *TLI = TM.getTargetLowering();
unsigned SP = TLI->getStackPointerRegisterToSaveRestore();
if (!LiveRegDefs[SP])
for (SDNode *Node = SU->getNode(); Node; Node = Node->getGluedNode())
if (Node->isMachineOpcode() &&
Node->getMachineOpcode() == (unsigned)TII->getCallFrameDestroyOpcode()) {
unsigned NestLevel = 0;
unsigned MaxNest = 0;
SDNode *N = FindCallSeqStart(Node, NestLevel, MaxNest, TII);
SUnit *Def = &SUnits[N->getNodeId()];
++NumLiveRegs;
LiveRegDefs[SP] = Def;
LiveRegGens[SP] = SU;
break;
}
}
/// Check to see if any of the pending instructions are ready to issue. If
@ -709,22 +605,6 @@ void ScheduleDAGRRList::ScheduleNodeBottomUp(SUnit *SU) {
LiveRegGens[I->getReg()] = NULL;
}
}
// Release the special call resource dependence, if this is the beginning
// of a call.
const TargetLowering *TLI = TM.getTargetLowering();
unsigned SP = TLI->getStackPointerRegisterToSaveRestore();
if (LiveRegDefs[SP] == SU)
for (const SDNode *SUNode = SU->getNode(); SUNode;
SUNode = SUNode->getGluedNode()) {
if (SUNode->isMachineOpcode() &&
SUNode->getMachineOpcode() == (unsigned)TII->getCallFrameSetupOpcode() &&
LiveRegDefs[SP] == SU) {
assert(NumLiveRegs > 0 && "NumLiveRegs is already zero!");
--NumLiveRegs;
LiveRegDefs[SP] = NULL;
LiveRegGens[SP] = NULL;
}
}
resetVRegCycle(SU);
@ -1203,20 +1083,6 @@ DelayForLiveRegsBottomUp(SUnit *SU, SmallVector<unsigned, 4> &LRegs) {
if (!Node->isMachineOpcode())
continue;
// If we're in the middle of scheduling a call, don't begin scheduling
// another call.
if (Node->getMachineOpcode() == (unsigned)TII->getCallFrameSetupOpcode() ||
Node->getMachineOpcode() == (unsigned)TII->getCallFrameDestroyOpcode()) {
for (unsigned i = 0, e = TRI->getNumRegs(); i != e; ++i)
if (LiveRegDefs[i]) {
SDNode *Gen = LiveRegGens[i]->getNode();
while (SDNode *Glued = Gen->getGluedNode())
Gen = Glued;
if (!IsChainDependent(Gen, Node) && RegAdded.insert(i))
LRegs.push_back(i);
}
continue;
}
const MCInstrDesc &MCID = TII->get(Node->getMachineOpcode());
if (!MCID.ImplicitDefs)
continue;

16
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -5290,10 +5290,6 @@ void SelectionDAG::ReplaceAllUsesWith(SDValue FromN, SDValue To,
// already exists there, recursively merge the results together.
AddModifiedNodeToCSEMaps(User, &Listener);
}
// If we just RAUW'd the root, take note.
if (FromN == getRoot())
setRoot(To);
}
/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
@ -5339,10 +5335,6 @@ void SelectionDAG::ReplaceAllUsesWith(SDNode *From, SDNode *To,
// already exists there, recursively merge the results together.
AddModifiedNodeToCSEMaps(User, &Listener);
}
// If we just RAUW'd the root, take note.
if (From == getRoot().getNode())
setRoot(SDValue(To, getRoot().getResNo()));
}
/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
@ -5381,10 +5373,6 @@ void SelectionDAG::ReplaceAllUsesWith(SDNode *From,
// already exists there, recursively merge the results together.
AddModifiedNodeToCSEMaps(User, &Listener);
}
// If we just RAUW'd the root, take note.
if (From == getRoot().getNode())
setRoot(SDValue(To[getRoot().getResNo()]));
}
/// ReplaceAllUsesOfValueWith - Replace any uses of From with To, leaving
@ -5443,10 +5431,6 @@ void SelectionDAG::ReplaceAllUsesOfValueWith(SDValue From, SDValue To,
// already exists there, recursively merge the results together.
AddModifiedNodeToCSEMaps(User, &Listener);
}
// If we just RAUW'd the root, take note.
if (From == getRoot())
setRoot(To);
}
namespace {

19
lib/Target/ARM/ARMISelLowering.cpp
View File

@ -1353,10 +1353,12 @@ ARMTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
SDValue Src = DAG.getNode(ISD::ADD, dl, getPointerTy(), Arg, SrcOffset);
SDValue SizeNode = DAG.getConstant(Flags.getByValSize() - 4*offset,
MVT::i32);
// TODO: Disable AlwaysInline when it becomes possible
// to emit a nested call sequence.
MemOpChains.push_back(DAG.getMemcpy(Chain, dl, Dst, Src, SizeNode,
Flags.getByValAlign(),
/*isVolatile=*/false,
/*AlwaysInline=*/false,
/*AlwaysInline=*/true,
MachinePointerInfo(0),
MachinePointerInfo(0)));
@ -4348,24 +4350,9 @@ static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
// If this is undef splat, generate it via "just" vdup, if possible.
if (Lane == -1) Lane = 0;
// Test if V1 is a SCALAR_TO_VECTOR.
if (Lane == 0 && V1.getOpcode() == ISD::SCALAR_TO_VECTOR) {
return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
}
// Test if V1 is a BUILD_VECTOR which is equivalent to a SCALAR_TO_VECTOR
// (and probably will turn into a SCALAR_TO_VECTOR once legalization
// reaches it).
if (Lane == 0 && V1.getOpcode() == ISD::BUILD_VECTOR &&
!isa<ConstantSDNode>(V1.getOperand(0))) {
bool IsScalarToVector = true;
for (unsigned i = 1, e = V1.getNumOperands(); i != e; ++i)
if (V1.getOperand(i).getOpcode() != ISD::UNDEF) {
IsScalarToVector = false;
break;
}
if (IsScalarToVector)
return DAG.getNode(ARMISD::VDUP, dl, VT, V1.getOperand(0));
}
return DAG.getNode(ARMISD::VDUPLANE, dl, VT, V1,
DAG.getConstant(Lane, MVT::i32));
}

4
lib/Target/X86/X86ISelDAGToDAG.cpp
View File

@ -2114,9 +2114,7 @@ SDNode *X86DAGToDAGISel::Select(SDNode *Node) {
HasNoSignedComparisonUses(Node))
// Look past the truncate if CMP is the only use of it.
N0 = N0.getOperand(0);
if ((N0.getNode()->getOpcode() == ISD::AND ||
(N0.getResNo() == 0 && N0.getNode()->getOpcode() == X86ISD::AND)) &&
N0.getNode()->hasOneUse() &&
if (N0.getNode()->getOpcode() == ISD::AND && N0.getNode()->hasOneUse() &&
N0.getValueType() != MVT::i8 &&
X86::isZeroNode(N1)) {
ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0.getNode()->getOperand(1));

194
lib/Target/X86/X86ISelLowering.cpp
View File

@ -4220,29 +4220,6 @@ static bool isScalarLoadToVector(SDNode *N, LoadSDNode **LD = NULL) {
return true;
}
// Test whether the given value is a vector value which will be legalized
// into a load.
static bool WillBeConstantPoolLoad(SDNode *N) {
if (N->getOpcode() != ISD::BUILD_VECTOR)
return false;
// Check for any non-constant elements.
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
switch (N->getOperand(i).getNode()->getOpcode()) {
case ISD::UNDEF:
case ISD::ConstantFP:
case ISD::Constant:
break;
default:
return false;
}
// Vectors of all-zeros and all-ones are materialized with special
// instructions rather than being loaded.
return !ISD::isBuildVectorAllZeros(N) &&
!ISD::isBuildVectorAllOnes(N);
}
/// ShouldXformToMOVLP{S|D} - Return true if the node should be transformed to
/// match movlp{s|d}. The lower half elements should come from lower half of
/// V1 (and in order), and the upper half elements should come from the upper
@ -4258,7 +4235,7 @@ static bool ShouldXformToMOVLP(SDNode *V1, SDNode *V2,
return false;
// Is V2 is a vector load, don't do this transformation. We will try to use
// load folding shufps op.
if (ISD::isNON_EXTLoad(V2) || WillBeConstantPoolLoad(V2))
if (ISD::isNON_EXTLoad(V2))
return false;
unsigned NumElems = VT.getVectorNumElements();
@ -6374,8 +6351,6 @@ SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasXMMInt) {
if (MayFoldVectorLoad(V1) && MayFoldIntoStore(Op))
CanFoldLoad = true;
ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
// Both of them can't be memory operations though.
if (MayFoldVectorLoad(V1) && MayFoldVectorLoad(V2))
CanFoldLoad = false;
@ -6385,11 +6360,10 @@ SDValue getMOVLP(SDValue &Op, DebugLoc &dl, SelectionDAG &DAG, bool HasXMMInt) {
return getTargetShuffleNode(X86ISD::MOVLPD, dl, VT, V1, V2, DAG);
if (NumElems == 4)
// If we don't care about the second element, procede to use movss.
if (SVOp->getMaskElt(1) != -1)
return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
return getTargetShuffleNode(X86ISD::MOVLPS, dl, VT, V1, V2, DAG);
}
ShuffleVectorSDNode *SVOp = cast<ShuffleVectorSDNode>(Op);
// movl and movlp will both match v2i64, but v2i64 is never matched by
// movl earlier because we make it strict to avoid messing with the movlp load
// folding logic (see the code above getMOVLP call). Match it here then,
@ -8707,9 +8681,8 @@ SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
// If condition flag is set by a X86ISD::CMP, then use it as the condition
// setting operand in place of the X86ISD::SETCC.
unsigned CondOpcode = Cond.getOpcode();
if (CondOpcode == X86ISD::SETCC ||
CondOpcode == X86ISD::SETCC_CARRY) {
if (Cond.getOpcode() == X86ISD::SETCC ||
Cond.getOpcode() == X86ISD::SETCC_CARRY) {
CC = Cond.getOperand(0);
SDValue Cmp = Cond.getOperand(1);
@ -8726,39 +8699,6 @@ SDValue X86TargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
Cond = Cmp;
addTest = false;
}
} else if (CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
Cond.getOperand(0).getValueType() != MVT::i8)) {
SDValue LHS = Cond.getOperand(0);
SDValue RHS = Cond.getOperand(1);
unsigned X86Opcode;
unsigned X86Cond;
SDVTList VTs;
switch (CondOpcode) {
case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
default: llvm_unreachable("unexpected overflowing operator");
}
if (CondOpcode == ISD::UMULO)
VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
MVT::i32);
else
VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
SDValue X86Op = DAG.getNode(X86Opcode, DL, VTs, LHS, RHS);
if (CondOpcode == ISD::UMULO)
Cond = X86Op.getValue(2);
else
Cond = X86Op.getValue(1);
CC = DAG.getConstant(X86Cond, MVT::i8);
addTest = false;
}
if (addTest) {
@ -8840,27 +8780,11 @@ SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
SDValue Dest = Op.getOperand(2);
DebugLoc dl = Op.getDebugLoc();
SDValue CC;
bool Inverted = false;
if (Cond.getOpcode() == ISD::SETCC) {
// Check for setcc([su]{add,sub,mul}o == 0).
if (cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETEQ &&
isa<ConstantSDNode>(Cond.getOperand(1)) &&
cast<ConstantSDNode>(Cond.getOperand(1))->isNullValue() &&
Cond.getOperand(0).getResNo() == 1 &&
(Cond.getOperand(0).getOpcode() == ISD::SADDO ||
Cond.getOperand(0).getOpcode() == ISD::UADDO ||
Cond.getOperand(0).getOpcode() == ISD::SSUBO ||
Cond.getOperand(0).getOpcode() == ISD::USUBO ||
Cond.getOperand(0).getOpcode() == ISD::SMULO ||
Cond.getOperand(0).getOpcode() == ISD::UMULO)) {
Inverted = true;
Cond = Cond.getOperand(0);
} else {
SDValue NewCond = LowerSETCC(Cond, DAG);
if (NewCond.getNode())
Cond = NewCond;
}
SDValue NewCond = LowerSETCC(Cond, DAG);
if (NewCond.getNode())
Cond = NewCond;
}
#if 0
// FIXME: LowerXALUO doesn't handle these!!
@ -8881,9 +8805,8 @@ SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
// If condition flag is set by a X86ISD::CMP, then use it as the condition
// setting operand in place of the X86ISD::SETCC.
unsigned CondOpcode = Cond.getOpcode();
if (CondOpcode == X86ISD::SETCC ||
CondOpcode == X86ISD::SETCC_CARRY) {
if (Cond.getOpcode() == X86ISD::SETCC ||
Cond.getOpcode() == X86ISD::SETCC_CARRY) {
CC = Cond.getOperand(0);
SDValue Cmp = Cond.getOperand(1);
@ -8904,43 +8827,6 @@ SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
break;
}
}
}
CondOpcode = Cond.getOpcode();
if (CondOpcode == ISD::UADDO || CondOpcode == ISD::SADDO ||
CondOpcode == ISD::USUBO || CondOpcode == ISD::SSUBO ||
((CondOpcode == ISD::UMULO || CondOpcode == ISD::SMULO) &&
Cond.getOperand(0).getValueType() != MVT::i8)) {
SDValue LHS = Cond.getOperand(0);
SDValue RHS = Cond.getOperand(1);
unsigned X86Opcode;
unsigned X86Cond;
SDVTList VTs;
switch (CondOpcode) {
case ISD::UADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_B; break;
case ISD::SADDO: X86Opcode = X86ISD::ADD; X86Cond = X86::COND_O; break;
case ISD::USUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_B; break;
case ISD::SSUBO: X86Opcode = X86ISD::SUB; X86Cond = X86::COND_O; break;
case ISD::UMULO: X86Opcode = X86ISD::UMUL; X86Cond = X86::COND_O; break;
case ISD::SMULO: X86Opcode = X86ISD::SMUL; X86Cond = X86::COND_O; break;
default: llvm_unreachable("unexpected overflowing operator");
}
if (Inverted)
X86Cond = X86::GetOppositeBranchCondition((X86::CondCode)X86Cond);
if (CondOpcode == ISD::UMULO)
VTs = DAG.getVTList(LHS.getValueType(), LHS.getValueType(),
MVT::i32);
else
VTs = DAG.getVTList(LHS.getValueType(), MVT::i32);
SDValue X86Op = DAG.getNode(X86Opcode, dl, VTs, LHS, RHS);
if (CondOpcode == ISD::UMULO)
Cond = X86Op.getValue(2);
else
Cond = X86Op.getValue(1);
CC = DAG.getConstant(X86Cond, MVT::i8);
addTest = false;
} else {
unsigned CondOpc;
if (Cond.hasOneUse() && isAndOrOfSetCCs(Cond, CondOpc)) {
@ -9004,66 +8890,6 @@ SDValue X86TargetLowering::LowerBRCOND(SDValue Op, SelectionDAG &DAG) const {
CC = DAG.getConstant(CCode, MVT::i8);
Cond = Cond.getOperand(0).getOperand(1);
addTest = false;
} else if (Cond.getOpcode() == ISD::SETCC &&
cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETOEQ) {
// For FCMP_OEQ, we can emit
// two branches instead of an explicit AND instruction with a
// separate test. However, we only do this if this block doesn't
// have a fall-through edge, because this requires an explicit
// jmp when the condition is false.
if (Op.getNode()->hasOneUse()) {
SDNode *User = *Op.getNode()->use_begin();
// Look for an unconditional branch following this conditional branch.
// We need this because we need to reverse the successors in order
// to implement FCMP_OEQ.
if (User->getOpcode() == ISD::BR) {
SDValue FalseBB = User->getOperand(1);
SDNode *NewBR =
DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
assert(NewBR == User);
(void)NewBR;
Dest = FalseBB;
SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
Cond.getOperand(0), Cond.getOperand(1));
CC = DAG.getConstant(X86::COND_NE, MVT::i8);
Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
Chain, Dest, CC, Cmp);
CC = DAG.getConstant(X86::COND_P, MVT::i8);
Cond = Cmp;
addTest = false;
}
}
} else if (Cond.getOpcode() == ISD::SETCC &&
cast<CondCodeSDNode>(Cond.getOperand(2))->get() == ISD::SETUNE) {
// For FCMP_UNE, we can emit
// two branches instead of an explicit AND instruction with a
// separate test. However, we only do this if this block doesn't
// have a fall-through edge, because this requires an explicit
// jmp when the condition is false.
if (Op.getNode()->hasOneUse()) {
SDNode *User = *Op.getNode()->use_begin();
// Look for an unconditional branch following this conditional branch.
// We need this because we need to reverse the successors in order
// to implement FCMP_UNE.
if (User->getOpcode() == ISD::BR) {
SDValue FalseBB = User->getOperand(1);
SDNode *NewBR =
DAG.UpdateNodeOperands(User, User->getOperand(0), Dest);
assert(NewBR == User);
(void)NewBR;
SDValue Cmp = DAG.getNode(X86ISD::CMP, dl, MVT::i32,
Cond.getOperand(0), Cond.getOperand(1));
CC = DAG.getConstant(X86::COND_NE, MVT::i8);
Chain = DAG.getNode(X86ISD::BRCOND, dl, Op.getValueType(),
Chain, Dest, CC, Cmp);
CC = DAG.getConstant(X86::COND_NP, MVT::i8);
Cond = Cmp;
addTest = false;
Dest = FalseBB;
}
}
}
}

9
lib/Target/XCore/XCoreISelLowering.cpp
View File

@ -386,15 +386,6 @@ IsWordAlignedBasePlusConstantOffset(SDValue Addr, SDValue &AlignedBase,
Offset = off;
return true;
}
// Check for an aligned global variable.
if (GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(*Root)) {
const GlobalValue *GV = GA->getGlobal();
if (GA->getOffset() == 0 && GV->getAlignment() >= 4) {
AlignedBase = Base;
Offset = off;
return true;
}
}
return false;
}

3
test/CodeGen/CellSPU/and_ops.ll
View File

@ -5,9 +5,6 @@
; RUN: grep andhi %t1.s | count 30
; RUN: grep andbi %t1.s | count 4
; CellSPU legalization is over-sensitive to Legalize's traversal order.
; XFAIL: *
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
target triple = "spu"

3
test/CodeGen/CellSPU/call_indirect.ll
View File

@ -15,9 +15,6 @@
; RUN: grep ai %t2.s | count 9
; RUN: grep dispatch_tab %t2.s | count 6
; CellSPU legalization is over-sensitive to Legalize's traversal order.
; XFAIL: *
; ModuleID = 'call_indirect.bc'
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128"
target triple = "spu-unknown-elf"

4
test/CodeGen/CellSPU/nand.ll
View File

@ -3,10 +3,6 @@
; RUN: grep and %t1.s | count 94
; RUN: grep xsbh %t1.s | count 2
; RUN: grep xshw %t1.s | count 4
; CellSPU legalization is over-sensitive to Legalize's traversal order.
; XFAIL: *
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
target triple = "spu"

3
test/CodeGen/CellSPU/or_ops.ll
View File

@ -6,9 +6,6 @@
; RUN: grep orbi %t1.s | count 15
; RUN: FileCheck %s < %t1.s
; CellSPU legalization is over-sensitive to Legalize's traversal order.
; XFAIL: *
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
target triple = "spu"

3
test/CodeGen/CellSPU/select_bits.ll
View File

@ -1,9 +1,6 @@
; RUN: llc < %s -march=cellspu > %t1.s
; RUN: grep selb %t1.s | count 56
; CellSPU legalization is over-sensitive to Legalize's traversal order.
; XFAIL: *
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
target triple = "spu"

3
test/CodeGen/CellSPU/struct_1.ll
View File

@ -22,9 +22,6 @@
; RUN: grep shufb %t2.s | count 7
; RUN: grep stqd %t2.s | count 7
; CellSPU legalization is over-sensitive to Legalize's traversal order.
; XFAIL: *
; ModuleID = 'struct_1.bc'
target datalayout = "E-p:32:32:128-f64:64:128-f32:32:128-i64:32:128-i32:32:128-i16:16:128-i8:8:128-i1:8:128-a0:0:128-v128:128:128-s0:128:128"
target triple = "spu"

6
test/CodeGen/Mips/cprestore.ll
View File

@ -1,4 +1,8 @@
; RUN: llc -march=mipsel < %s | FileCheck %s
; DISABLED: llc -march=mipsel < %s | FileCheck %s
; RUN: false
; byval is currently unsupported.
; XFAIL: *
; CHECK: .set macro
; CHECK-NEXT: .cprestore

6
test/CodeGen/Mips/largeimmprinting.ll
View File

@ -1,4 +1,8 @@
; RUN: llc -march=mipsel -mcpu=4ke < %s | FileCheck %s
; DISABLED: llc -march=mipsel -mcpu=4ke < %s | FileCheck %s
; RUN: false
; byval is currently unsupported.
; XFAIL: *
%struct.S1 = type { [65536 x i8] }

6
test/CodeGen/Thumb/2011-05-11-DAGLegalizer.ll
View File

@ -1,7 +1,11 @@
; RUN: llc -mtriple=thumbv6-apple-darwin < %s
; DISABLED: llc -mtriple=thumbv6-apple-darwin < %s
; RUN: false
; rdar://problem/9416774
; ModuleID = 'reduced.ll'
; byval is currently unsupported.
; XFAIL: *
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:64-v128:32:128-a0:0:32-n32"
target triple = "thumbv7-apple-ios"

24
test/CodeGen/X86/sse3.ll
View File

@ -16,8 +16,10 @@ entry:
ret void
; X64: t0:
; X64: movdqa (%rsi), %xmm0
; X64: pslldq $2, %xmm0
; X64: movddup (%rsi), %xmm0
; X64: pshuflw $0, %xmm0, %xmm0
; X64: xorl %eax, %eax
; X64: pinsrw $0, %eax, %xmm0
; X64: movdqa %xmm0, (%rdi)
; X64: ret
}
@ -29,8 +31,9 @@ define <8 x i16> @t1(<8 x i16>* %A, <8 x i16>* %B) nounwind {
ret <8 x i16> %tmp3
; X64: t1:
; X64: movl (%rsi), %eax
; X64: movdqa (%rdi), %xmm0
; X64: pinsrw $0, (%rsi), %xmm0
; X64: pinsrw $0, %eax, %xmm0
; X64: ret
}
@ -165,7 +168,7 @@ define internal void @t10() nounwind {
ret void
; X64: t10:
; X64: pextrw $4, [[X0:%xmm[0-9]+]], %eax
; X64: movlhps [[X1:%xmm[0-9]+]]
; X64: unpcklpd [[X1:%xmm[0-9]+]]
; X64: pshuflw $8, [[X1]], [[X2:%xmm[0-9]+]]
; X64: pinsrw $2, %eax, [[X2]]
; X64: pextrw $6, [[X0]], %eax
@ -247,12 +250,13 @@ entry:
%tmp9 = shufflevector <16 x i8> %tmp8, <16 x i8> %T0, <16 x i32> < i32 0, i32 1, i32 2, i32 17, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef , i32 undef >
ret <16 x i8> %tmp9
; X64: t16:
; X64: movdqa %xmm1, %xmm0
; X64: pslldq $2, %xmm0
; X64: pextrw $1, %xmm0, %eax
; X64: movd %xmm0, %ecx
; X64: pinsrw $0, %ecx, %xmm0
; X64: pextrw $8, %xmm1, %ecx
; X64: pinsrw $0, %eax, [[X1:%xmm[0-9]+]]
; X64: pextrw $8, [[X0:%xmm[0-9]+]], %eax
; X64: pinsrw $1, %eax, [[X1]]
; X64: pextrw $1, [[X1]], %ecx
; X64: movd [[X1]], %edx
; X64: pinsrw $0, %edx, %xmm
; X64: pinsrw $1, %eax, %xmm
; X64: ret
}