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

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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
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lib/Target/Alpha/AlphaCodeEmitter.cpp
+4 -11
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@@ -35,8 +35,7 @@ namespace {
class AlphaCodeEmitter : public MachineFunctionPass {
const AlphaInstrInfo *II;
MachineCodeEmitter &MCE;
std::vector<unsigned*> BasicBlockAddrs;
std::vector<std::pair<const MachineBasicBlock *, unsigned*> > BBRefs;
std::vector<std::pair<MachineBasicBlock *, unsigned*> > BBRefs;
/// getMachineOpValue - evaluates the MachineOperand of a given MachineInstr
///
@@ -78,7 +77,6 @@ bool AlphaCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
do {
BBRefs.clear();
BasicBlockAddrs.clear();
MCE.startFunction(MF);
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
@@ -87,7 +85,8 @@ bool AlphaCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
// Resolve all forward branches now...
for (unsigned i = 0, e = BBRefs.size(); i != e; ++i) {
unsigned* Location = BasicBlockAddrs[BBRefs[i].first->getNumber()];
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;
@@ -97,17 +96,11 @@ bool AlphaCodeEmitter::runOnMachineFunction(MachineFunction &MF) {
*Ref |= (BranchTargetDisp & ((1 << 21)-1));
}
BBRefs.clear();
BasicBlockAddrs.clear();
return false;
}
void AlphaCodeEmitter::emitBasicBlock(MachineBasicBlock &MBB) {
if (BasicBlockAddrs.size() <= (unsigned)MBB.getNumber())
BasicBlockAddrs.resize((MBB.getNumber()+1)*2);
BasicBlockAddrs[MBB.getNumber()] = (unsigned*)MCE.getCurrentPCValue();
MCE.StartMachineBasicBlock(&MBB);
for (MachineBasicBlock::iterator I = MBB.begin(), E = MBB.end();
I != E; ++I) {
MachineInstr &MI = *I;