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- Refactor the code that resolve basic block references to a TargetJITInfo

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method.
- Added synchronizeICache() to TargetJITInfo. It is called after each block
  of code is emitted to flush the icache. This ensures correct execution
  on targets that have separate dcache and icache.
- Added PPC / Mac OS X specific code to do icache flushing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29276 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2006-07-25 20:40:54 +00:00
parent 55371739de
commit 55fc28076f
16 changed files with 136 additions and 72 deletions
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34
lib/Target/Alpha/AlphaCodeEmitter.cpp
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@@ -34,17 +34,19 @@ namespace {
namespace {
class AlphaCodeEmitter : public MachineFunctionPass {
const AlphaInstrInfo *II;
TargetMachine &TM;
MachineCodeEmitter &MCE;
std::vector<std::pair<MachineBasicBlock *, unsigned*> > BBRefs;
/// getMachineOpValue - evaluates the MachineOperand of a given MachineInstr
///
int getMachineOpValue(MachineInstr &MI, MachineOperand &MO);
public:
explicit AlphaCodeEmitter(MachineCodeEmitter &mce) : II(0), MCE(mce) {}
AlphaCodeEmitter(MachineCodeEmitter &mce, const AlphaInstrInfo& ii)
: II(&ii), MCE(mce) {}
explicit AlphaCodeEmitter(TargetMachine &tm, MachineCodeEmitter &mce)
: II(0), TM(tm), MCE(mce) {}
AlphaCodeEmitter(TargetMachine &tm, MachineCodeEmitter &mce,
const AlphaInstrInfo& ii)
: II(&ii), TM(tm), MCE(mce) {}
bool runOnMachineFunction(MachineFunction &MF);
@@ -68,34 +70,20 @@ namespace {
/// createAlphaCodeEmitterPass - Return a pass that emits the collected Alpha code
/// to the specified MCE object.
FunctionPass *llvm::createAlphaCodeEmitterPass(MachineCodeEmitter &MCE) {
return new AlphaCodeEmitter(MCE);
FunctionPass *llvm::createAlphaCodeEmitterPass(AlphaTargetMachine &TM,
MachineCodeEmitter &MCE) {
return new AlphaCodeEmitter(TM, MCE);
}
bool AlphaCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
II = ((AlphaTargetMachine&)MF.getTarget()).getInstrInfo();
do {
BBRefs.clear();
MCE.startFunction(MF);
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
emitBasicBlock(*I);
} while (MCE.finishFunction(MF));
// Resolve all forward branches now...
for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
unsigned* Location =
(unsigned*)MCE.getMachineBasicBlockAddress(BBRefs[i].first);
unsigned* Ref = (unsigned*)BBRefs[i].second;
intptr_t BranchTargetDisp =
(((unsigned char*)Location - (unsigned char*)Ref) >> 2) - 1;
DEBUG(std::cerr << "Fixup @ " << (void*)Ref << " to " << (void*)Location
<< " Disp " << BranchTargetDisp
<< " using " << (BranchTargetDisp & ((1 << 22)-1)) << "\n");
*Ref |= (BranchTargetDisp & ((1 << 21)-1));
}
BBRefs.clear();
return false;
}
@@ -227,8 +215,8 @@ int AlphaCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
Reloc, MO.getConstantPoolIndex(),
Offset));
} else if (MO.isMachineBasicBlock()) {
unsigned* CurrPC = (unsigned*)(intptr_t)MCE.getCurrentPCValue();
BBRefs.push_back(std::make_pair(MO.getMachineBasicBlock(), CurrPC));
TM.getJITInfo()->addBBRef(MO.getMachineBasicBlock(),
MCE.getCurrentPCValue());
}else {
std::cerr << "ERROR: Unknown type of MachineOperand: " << MO << "\n";
abort();