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Call the InsertAtEndOfBasicBlock hook if the usesCustomDAGSchedInserter

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flag is set on an instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23098 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-26 20:54:47 +00:00
parent 8fae46675d
commit 025c39bf36
2 changed files with 22 additions and 1 deletions
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9
lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
View File

@ -20,6 +20,7 @@
#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;
@ -166,7 +167,13 @@ unsigned SimpleSched::Emit(SDOperand Op) {
}
// 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:

14
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -855,6 +855,20 @@ void SelectionDAGLowering::visitFree(FreeInst &I) {
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) {