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Beef up interface, move getVarInfo out-of-line.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6114 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-05-12 14:23:04 +00:00
parent a6e73f1956
commit bc4a15f6fa
1 changed files with 39 additions and 12 deletions
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51
include/llvm/CodeGen/LiveVariables.h
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@ -28,6 +28,7 @@
class MRegisterInfo;
class LiveVariables : public MachineFunctionPass {
public:
struct VarInfo {
/// DefBlock - The basic block which defines this value...
MachineBasicBlock *DefBlock;
@ -46,8 +47,20 @@ class LiveVariables : public MachineFunctionPass {
std::vector<std::pair<MachineBasicBlock*, MachineInstr*> > Kills;
VarInfo() : DefBlock(0), DefInst(0) {}
/// removeKill - Delete a kill corresponding to the specified machine instr
void removeKill(MachineInstr *MI) {
for (unsigned i = 0; ; ++i) {
assert(i < Kills.size() && "Machine instr is not a kill!");
if (Kills[i].second == MI) {
Kills.erase(Kills.begin()+i);
return;
}
}
}
};
private:
/// VirtRegInfo - This list is a mapping from virtual register number to
/// variable information. FirstVirtualRegister is subtracted from the virtual
/// register number before indexing into this list.
@ -88,6 +101,17 @@ public:
virtual bool runOnMachineFunction(MachineFunction &MF);
/// getMachineBasicBlockIndex - Turn a MachineBasicBlock into an index number
/// suitable for use with VarInfo's.
///
const std::pair<MachineBasicBlock*, unsigned>
&getMachineBasicBlockInfo(MachineBasicBlock *MBB) const;
const std::pair<MachineBasicBlock*, unsigned>
&getBasicBlockInfo(const BasicBlock *BB) const {
return BBMap.find(BB)->second;
}
/// killed_iterator - Iterate over registers killed by a machine instruction
///
typedef std::multimap<MachineInstr*, unsigned>::iterator killed_iterator;
@ -123,26 +147,34 @@ public:
/// specified register is killed after being used by the specified
/// instruction.
///
void addVirtualRegisterKilled(unsigned IncomingReg, MachineInstr *MI) {
void addVirtualRegisterKilled(unsigned IncomingReg, MachineBasicBlock *MBB,
MachineInstr *MI) {
RegistersKilled.insert(std::make_pair(MI, IncomingReg));
getVarInfo(IncomingReg).Kills.push_back(std::make_pair(MBB, MI));
}
/// removeVirtualRegistersKilled - Remove all of the specified killed
/// registers from the live variable information.
void removeVirtualRegistersKilled(killed_iterator B, killed_iterator E) {
for (killed_iterator I = B; I != E; ++I) // Remove VarInfo entries...
getVarInfo(I->second).removeKill(I->first);
RegistersKilled.erase(B, E);
}
/// addVirtualRegisterDead - Add information about the fact that the specified
/// register is dead after being used by the specified instruction.
///
void addVirtualRegisterDead(unsigned IncomingReg, MachineInstr *MI) {
void addVirtualRegisterDead(unsigned IncomingReg, MachineBasicBlock *MBB,
MachineInstr *MI) {
RegistersDead.insert(std::make_pair(MI, IncomingReg));
getVarInfo(IncomingReg).Kills.push_back(std::make_pair(MBB, MI));
}
/// removeVirtualRegistersKilled - Remove all of the specified killed
/// registers from the live variable information.
void removeVirtualRegistersDead(killed_iterator B, killed_iterator E) {
for (killed_iterator I = B; I != E; ++I) // Remove VarInfo entries...
getVarInfo(I->second).removeKill(I->first);
RegistersDead.erase(B, E);
}
@ -154,17 +186,12 @@ public:
VirtRegInfo.clear();
RegistersKilled.clear();
RegistersDead.clear();
BBMap.clear();
}
private:
VarInfo &getVarInfo(unsigned RegIdx) {
if (RegIdx >= VirtRegInfo.size()) {
if (RegIdx >= 2*VirtRegInfo.size())
VirtRegInfo.resize(RegIdx*2);
else
VirtRegInfo.resize(2*VirtRegInfo.size());
}
return VirtRegInfo[RegIdx];
}
/// getVarInfo - Return the VarInfo structure for the specified VIRTUAL
/// register.
VarInfo &getVarInfo(unsigned RegIdx);
void MarkVirtRegAliveInBlock(VarInfo &VRInfo, const BasicBlock *BB);
void HandleVirtRegUse(VarInfo &VRInfo, MachineBasicBlock *MBB,