#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetLowering.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
}
// Now that we have emitted all operands, emit this instruction itself.
- BB->insert(BB->end(), MI);
+ if ((II.Flags & M_USES_CUSTOM_DAG_SCHED_INSERTION) == 0) {
+ BB->insert(BB->end(), MI);
+ } else {
+ // Insert this instruction into the end of the basic block, potentially
+ // taking some custom action.
+ BB = DAG.getTargetLoweringInfo().InsertAtEndOfBasicBlock(MI, BB);
+ }
} else {
switch (Op.getOpcode()) {
default:
DAG.setRoot(Result.second);
}
+// InsertAtEndOfBasicBlock - This method should be implemented by targets that
+// mark instructions with the 'usesCustomDAGSchedInserter' flag. These
+// instructions are special in various ways, which require special support to
+// 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::InsertAtEndOfBasicBlock(MachineInstr *MI,
+ MachineBasicBlock *MBB) {
+ std::cerr << "If a target marks an instruction with "
+ "'usesCustomDAGSchedInserter', it must implement "
+ "TargetLowering::InsertAtEndOfBasicBlock!\n";
+ abort();
+ return 0;
+}
+
SDOperand TargetLowering::LowerVAStart(SDOperand Chain,
SDOperand VAListP, Value *VAListV,
SelectionDAG &DAG) {