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Delete an assignment to ThisBB which isn't needed, and tidy up some

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llvm-svn: 123479
This commit is contained in:
Dan Gohman 2011-01-14 22:26:16 +00:00
parent 51dcd56f96
commit a4f2631ea9
1 changed files with 6 additions and 4 deletions
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10
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -1135,7 +1135,7 @@ SelectionDAGISel::FinishBasicBlock() {
// additional DAGs necessary.
for (unsigned i = 0, e = SDB->SwitchCases.size(); i != e; ++i) {
// Set the current basic block to the mbb we wish to insert the code into
MachineBasicBlock *ThisBB = FuncInfo->MBB = SDB->SwitchCases[i].ThisBB;
FuncInfo->MBB = SDB->SwitchCases[i].ThisBB;
FuncInfo->InsertPt = FuncInfo->MBB->end();
// Determine the unique successors.
@ -1144,13 +1144,15 @@ SelectionDAGISel::FinishBasicBlock() {
if (SDB->SwitchCases[i].TrueBB != SDB->SwitchCases[i].FalseBB)
Succs.push_back(SDB->SwitchCases[i].FalseBB);
// Emit the code. Note that this could result in ThisBB being split, so
// we need to check for updates.
// Emit the code. Note that this could result in FuncInfo->MBB being split.
SDB->visitSwitchCase(SDB->SwitchCases[i], FuncInfo->MBB);
CurDAG->setRoot(SDB->getRoot());
SDB->clear();
CodeGenAndEmitDAG();
ThisBB = FuncInfo->MBB;
// Remember the last block, now that any splitting is done, for use in
// populating PHI nodes in successors.
MachineBasicBlock *ThisBB = FuncInfo->MBB;
// 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