6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2026-04-26 12:20:42 +00:00
Code Issues Projects Releases Wiki Activity

Suck block address tracking out of targets into the JIT Emitter. This

Browse Source 
simplifies the MachineCodeEmitter interface just a little bit and makes
BasicBlocks work like constant pools and jump tables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28082 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-05-03 17:10:41 +00:00
parent 5c488182da
commit b4432f3d47
6 changed files with 74 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Target/PowerPC/PPCCodeEmitter.cpp
+6 -12
View File
@@ -33,9 +33,7 @@ namespace {
// Tracks which instruction references which BasicBlock
std::vector<std::pair<MachineBasicBlock*, unsigned*> > BBRefs;
// Tracks where each BasicBlock starts, indexes by BB number.
std::vector<uint64_t> BasicBlockAddrs;
/// getMachineOpValue - evaluates the MachineOperand of a given MachineInstr
///
int getMachineOpValue(MachineInstr &MI, MachineOperand &MO);
@@ -87,17 +85,15 @@ bool PPCCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
"JIT relocation model must be set to static or default!");
do {
BBRefs.clear();
BasicBlockAddrs.clear();
MCE.startFunction(MF);
for (MachineFunction::iterator BB = MF.begin(), E = MF.end(); BB != E; ++BB)
emitBasicBlock(*BB);
MCE.emitJumpTableInfo(MF.getJumpTableInfo(), BasicBlockAddrs);
} while (MCE.finishFunction(MF));
// Resolve branches to BasicBlocks for the entire function
for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
intptr_t Location = BasicBlockAddrs[BBRefs[i].first->getNumber()];
intptr_t Location = MCE.getMachineBasicBlockAddress(BBRefs[i].first);
unsigned *Ref = BBRefs[i].second;
DEBUG(std::cerr << "Fixup @ " << (void*)Ref << " to " << (void*)Location
<< "\n");
@@ -115,15 +111,13 @@ bool PPCCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
}
}
BBRefs.clear();
BasicBlockAddrs.clear();
return false;
}
void PPCCodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
if (BasicBlockAddrs.size() <= (unsigned)MBB.getNumber())
BasicBlockAddrs.resize((MBB.getNumber()+1)*2);
BasicBlockAddrs[MBB.getNumber()] = MCE.getCurrentPCValue();
MCE.StartMachineBasicBlock(&MBB);
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end(); I != E; ++I){
MachineInstr &MI = *I;
unsigned Opcode = MI.getOpcode();
@@ -145,8 +139,8 @@ void PPCCodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
int PPCCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) {
int rv = 0; // Return value; defaults to 0 for unhandled cases
// or things that get fixed up later by the JIT.
intptr_t rv = 0; // Return value; defaults to 0 for unhandled cases
// or things that get fixed up later by the JIT.
if (MO.isRegister()) {
rv = PPCRegisterInfo::getRegisterNumbering(MO.getReg());