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-rw-r--r--lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h6
-rw-r--r--lib/CodeGen/SelectionDAG/ScheduleDAGSDNodesEmit.cpp13
-rw-r--r--lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp1
-rw-r--r--lib/CodeGen/SelectionDAG/SelectionDAGBuild.h8
-rw-r--r--lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp19
5 files changed, 33 insertions, 14 deletions
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
index 2a278b7..51041ef 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.h
@@ -113,9 +113,11 @@ namespace llvm {
/// register number for the results of the node.
///
void EmitNode(SDNode *Node, bool IsClone, bool HasClone,
- DenseMap<SDValue, unsigned> &VRBaseMap);
+ DenseMap<SDValue, unsigned> &VRBaseMap,
+ DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM);
- virtual MachineBasicBlock *EmitSchedule();
+ virtual MachineBasicBlock *
+ EmitSchedule(DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM);
/// Schedule - Order nodes according to selected style, filling
/// in the Sequence member.
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodesEmit.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodesEmit.cpp
index 5454e98..c404873 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodesEmit.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodesEmit.cpp
@@ -470,7 +470,8 @@ ScheduleDAGSDNodes::EmitCopyToRegClassNode(SDNode *Node,
/// EmitNode - Generate machine code for an node and needed dependencies.
///
void ScheduleDAGSDNodes::EmitNode(SDNode *Node, bool IsClone, bool IsCloned,
- DenseMap<SDValue, unsigned> &VRBaseMap) {
+ DenseMap<SDValue, unsigned> &VRBaseMap,
+ DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) {
// If machine instruction
if (Node->isMachineOpcode()) {
unsigned Opc = Node->getMachineOpcode();
@@ -531,7 +532,7 @@ void ScheduleDAGSDNodes::EmitNode(SDNode *Node, bool IsClone, bool IsCloned,
if (II.usesCustomDAGSchedInsertionHook()) {
// Insert this instruction into the basic block using a target
// specific inserter which may returns a new basic block.
- BB = TLI->EmitInstrWithCustomInserter(MI, BB);
+ BB = TLI->EmitInstrWithCustomInserter(MI, BB, EM);
InsertPos = BB->end();
} else {
BB->insert(InsertPos, MI);
@@ -652,7 +653,8 @@ void ScheduleDAGSDNodes::EmitNode(SDNode *Node, bool IsClone, bool IsCloned,
}
/// EmitSchedule - Emit the machine code in scheduled order.
-MachineBasicBlock *ScheduleDAGSDNodes::EmitSchedule() {
+MachineBasicBlock *ScheduleDAGSDNodes::
+EmitSchedule(DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) {
DenseMap<SDValue, unsigned> VRBaseMap;
DenseMap<SUnit*, unsigned> CopyVRBaseMap;
for (unsigned i = 0, e = Sequence.size(); i != e; i++) {
@@ -676,10 +678,11 @@ MachineBasicBlock *ScheduleDAGSDNodes::EmitSchedule() {
N = N->getFlaggedNode())
FlaggedNodes.push_back(N);
while (!FlaggedNodes.empty()) {
- EmitNode(FlaggedNodes.back(), SU->OrigNode != SU, SU->isCloned,VRBaseMap);
+ EmitNode(FlaggedNodes.back(), SU->OrigNode != SU, SU->isCloned,
+ VRBaseMap, EM);
FlaggedNodes.pop_back();
}
- EmitNode(SU->getNode(), SU->OrigNode != SU, SU->isCloned, VRBaseMap);
+ EmitNode(SU->getNode(), SU->OrigNode != SU, SU->isCloned, VRBaseMap, EM);
}
return BB;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index ff98292..36e7285 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -751,6 +751,7 @@ void SelectionDAGLowering::clear() {
NodeMap.clear();
PendingLoads.clear();
PendingExports.clear();
+ EdgeMapping.clear();
DAG.clear();
CurDebugLoc = DebugLoc::getUnknownLoc();
HasTailCall = false;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
index 9a079d6..06acc8a 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.h
@@ -345,9 +345,15 @@ public:
/// BitTestCases - Vector of BitTestBlock structures used to communicate
/// SwitchInst code generation information.
std::vector<BitTestBlock> BitTestCases;
-
+
+ /// PHINodesToUpdate - A list of phi instructions whose operand list will
+ /// be updated after processing the current basic block.
std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate;
+ /// EdgeMapping - If an edge from CurMBB to any MBB is changed (e.g. due to
+ /// scheduler custom lowering), track the change here.
+ DenseMap<MachineBasicBlock*, MachineBasicBlock*> EdgeMapping;
+
// Emit PHI-node-operand constants only once even if used by multiple
// PHI nodes.
DenseMap<Constant*, unsigned> ConstantsOut;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 19ea647..34e89dc 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -154,7 +154,8 @@ namespace llvm {
// insert. The specified MachineInstr is created but not inserted into any
// basic blocks, and the scheduler passes ownership of it to this method.
MachineBasicBlock *TargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
- MachineBasicBlock *MBB) const {
+ MachineBasicBlock *MBB,
+ DenseMap<MachineBasicBlock*, MachineBasicBlock*> *EM) const {
#ifndef NDEBUG
errs() << "If a target marks an instruction with "
"'usesCustomDAGSchedInserter', it must implement "
@@ -620,9 +621,9 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
// inserted into.
if (TimePassesIsEnabled) {
NamedRegionTimer T("Instruction Creation", GroupName);
- BB = Scheduler->EmitSchedule();
+ BB = Scheduler->EmitSchedule(&SDL->EdgeMapping);
} else {
- BB = Scheduler->EmitSchedule();
+ BB = Scheduler->EmitSchedule(&SDL->EdgeMapping);
}
// Free the scheduler state.
@@ -984,20 +985,25 @@ SelectionDAGISel::FinishBasicBlock() {
// additional DAGs necessary.
for (unsigned i = 0, e = SDL->SwitchCases.size(); i != e; ++i) {
// Set the current basic block to the mbb we wish to insert the code into
- BB = SDL->SwitchCases[i].ThisBB;
+ MachineBasicBlock *ThisBB = BB = SDL->SwitchCases[i].ThisBB;
SDL->setCurrentBasicBlock(BB);
// Emit the code
SDL->visitSwitchCase(SDL->SwitchCases[i]);
CurDAG->setRoot(SDL->getRoot());
CodeGenAndEmitDAG();
- SDL->clear();
// Handle any PHI nodes in successors of this chunk, as if we were coming
// from the original BB before switch expansion. Note that PHI nodes can
// occur multiple times in PHINodesToUpdate. We have to be very careful to
// handle them the right number of times.
while ((BB = SDL->SwitchCases[i].TrueBB)) { // Handle LHS and RHS.
+ // If new BB's are created during scheduling, the edges may have been
+ // updated.
+ DenseMap<MachineBasicBlock*, MachineBasicBlock*>::iterator EI =
+ SDL->EdgeMapping.find(BB);
+ if (EI != SDL->EdgeMapping.end())
+ ThisBB = EI->second;
for (MachineBasicBlock::iterator Phi = BB->begin();
Phi != BB->end() && Phi->getOpcode() == TargetInstrInfo::PHI; ++Phi){
// This value for this PHI node is recorded in PHINodesToUpdate, get it.
@@ -1007,7 +1013,7 @@ SelectionDAGISel::FinishBasicBlock() {
if (SDL->PHINodesToUpdate[pn].first == Phi) {
Phi->addOperand(MachineOperand::CreateReg(SDL->PHINodesToUpdate[pn].
second, false));
- Phi->addOperand(MachineOperand::CreateMBB(SDL->SwitchCases[i].ThisBB));
+ Phi->addOperand(MachineOperand::CreateMBB(ThisBB));
break;
}
}
@@ -1022,6 +1028,7 @@ SelectionDAGISel::FinishBasicBlock() {
SDL->SwitchCases[i].FalseBB = 0;
}
assert(SDL->SwitchCases[i].TrueBB == 0 && SDL->SwitchCases[i].FalseBB == 0);
+ SDL->clear();
}
SDL->SwitchCases.clear();
generated by cgit v1.1 at 2025-07-03 01:29:56 +0000