ffd1746d03
This commit merges the latest LLVM sources from the vendor space. It also updates the build glue to match the new sources. Clang's version number is changed to match LLVM's, which means /usr/include/clang/2.0 has been renamed to /usr/include/clang/2.8. Obtained from: projects/clangbsd
68 lines
2.5 KiB
C++
68 lines
2.5 KiB
C++
//===---- ScheduleDAGEmit.cpp - Emit routines for the ScheduleDAG class ---===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This implements the Emit routines for the ScheduleDAG class, which creates
|
|
// MachineInstrs according to the computed schedule.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#define DEBUG_TYPE "pre-RA-sched"
|
|
#include "llvm/CodeGen/ScheduleDAG.h"
|
|
#include "llvm/CodeGen/MachineConstantPool.h"
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineInstrBuilder.h"
|
|
#include "llvm/CodeGen/MachineRegisterInfo.h"
|
|
#include "llvm/Target/TargetData.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetInstrInfo.h"
|
|
#include "llvm/Target/TargetLowering.h"
|
|
#include "llvm/ADT/Statistic.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/MathExtras.h"
|
|
using namespace llvm;
|
|
|
|
void ScheduleDAG::EmitNoop() {
|
|
TII->insertNoop(*BB, InsertPos);
|
|
}
|
|
|
|
void ScheduleDAG::EmitPhysRegCopy(SUnit *SU,
|
|
DenseMap<SUnit*, unsigned> &VRBaseMap) {
|
|
for (SUnit::const_pred_iterator I = SU->Preds.begin(), E = SU->Preds.end();
|
|
I != E; ++I) {
|
|
if (I->isCtrl()) continue; // ignore chain preds
|
|
if (I->getSUnit()->CopyDstRC) {
|
|
// Copy to physical register.
|
|
DenseMap<SUnit*, unsigned>::iterator VRI = VRBaseMap.find(I->getSUnit());
|
|
assert(VRI != VRBaseMap.end() && "Node emitted out of order - late");
|
|
// Find the destination physical register.
|
|
unsigned Reg = 0;
|
|
for (SUnit::const_succ_iterator II = SU->Succs.begin(),
|
|
EE = SU->Succs.end(); II != EE; ++II) {
|
|
if (II->getReg()) {
|
|
Reg = II->getReg();
|
|
break;
|
|
}
|
|
}
|
|
BuildMI(*BB, InsertPos, DebugLoc(), TII->get(TargetOpcode::COPY), Reg)
|
|
.addReg(VRI->second);
|
|
} else {
|
|
// Copy from physical register.
|
|
assert(I->getReg() && "Unknown physical register!");
|
|
unsigned VRBase = MRI.createVirtualRegister(SU->CopyDstRC);
|
|
bool isNew = VRBaseMap.insert(std::make_pair(SU, VRBase)).second;
|
|
isNew = isNew; // Silence compiler warning.
|
|
assert(isNew && "Node emitted out of order - early");
|
|
BuildMI(*BB, InsertPos, DebugLoc(), TII->get(TargetOpcode::COPY), VRBase)
|
|
.addReg(I->getReg());
|
|
}
|
|
break;
|
|
}
|
|
}
|