void SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB,
BasicBlock::iterator Begin,
- BasicBlock::iterator End,
- bool DoArgs) {
- // Lower any arguments needed in this block if this is the entry block.
- if (DoArgs)
- LowerArguments(LLVMBB);
-
+ BasicBlock::iterator End) {
SDL->setCurrentBasicBlock(BB);
MachineModuleInfo *MMI = CurDAG->getMachineModuleInfo();
BasicBlock::iterator Begin = LLVMBB->begin();
BasicBlock::iterator End = LLVMBB->end();
- bool DoArgs = LLVMBB == &Fn.getEntryBlock();
+
+ // Lower any arguments needed in this block if this is the entry block.
+ if (LLVMBB == &Fn.getEntryBlock())
+ LowerArguments(LLVMBB);
// Before doing SelectionDAG ISel, see if FastISel has been requested.
// FastISel doesn't support EH landing pads, which require special handling.
if (EnableFastISel && !BB->isLandingPad()) {
if (FastISel *F = TLI.createFastISel(*FuncInfo->MF)) {
+ // Emit code for any incoming arguments. This must happen before
+ // beginning FastISel on the entry block.
+ if (LLVMBB == &Fn.getEntryBlock()) {
+ CurDAG->setRoot(SDL->getControlRoot());
+ CodeGenAndEmitDAG();
+ SDL->clear();
+ }
+ // Do FastISel on as many instructions as possible.
while (Begin != End) {
Begin = F->SelectInstructions(Begin, End, FuncInfo->ValueMap,
FuncInfo->MBBMap, BB);
R = FuncInfo->CreateRegForValue(Begin);
}
- SelectBasicBlock(LLVMBB, Begin, next(Begin), DoArgs);
-
+ SelectBasicBlock(LLVMBB, Begin, next(Begin));
++Begin;
- DoArgs = false;
continue;
}
}
}
- if (Begin != End || DoArgs)
- SelectBasicBlock(LLVMBB, Begin, End, DoArgs);
+ if (Begin != End)
+ SelectBasicBlock(LLVMBB, Begin, End);
FinishBasicBlock();
}