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Expand API for updating live var info.

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Expose iterators, not const-iterators.
Rename method that was VERY misleading


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6108 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-05-12 03:51:30 +00:00
parent bbd5839a97
commit 9c341366a7
1 changed files with 39 additions and 8 deletions
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47
include/llvm/CodeGen/LiveVariables.h
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@ -72,6 +72,7 @@ class LiveVariables : public MachineFunctionPass {
/// liveness for values that are not in this set.
///
std::vector<bool> AllocatablePhysicalRegisters;
private: // Intermediate data structures
/// BBMap - Maps LLVM basic blocks to their corresponding machine basic block.
@ -89,32 +90,62 @@ public:
/// killed_iterator - Iterate over registers killed by a machine instruction
///
typedef std::multimap<MachineInstr*,
unsigned>::const_iterator killed_iterator;
typedef std::multimap<MachineInstr*, unsigned>::iterator killed_iterator;
/// killed_begin/end - Get access to the range of registers killed by a
/// machine instruction.
killed_iterator killed_begin(MachineInstr *MI) const {
killed_iterator killed_begin(MachineInstr *MI) {
return RegistersKilled.lower_bound(MI);
}
killed_iterator killed_end(MachineInstr *MI) const {
killed_iterator killed_end(MachineInstr *MI) {
return RegistersKilled.upper_bound(MI);
}
std::pair<killed_iterator, killed_iterator>
killed_range(MachineInstr *MI) {
return RegistersKilled.equal_range(MI);
}
killed_iterator dead_begin(MachineInstr *MI) const {
killed_iterator dead_begin(MachineInstr *MI) {
return RegistersDead.lower_bound(MI);
}
killed_iterator dead_end(MachineInstr *MI) const {
killed_iterator dead_end(MachineInstr *MI) {
return RegistersDead.upper_bound(MI);
}
std::pair<killed_iterator, killed_iterator>
dead_range(MachineInstr *MI) {
return RegistersDead.equal_range(MI);
}
/// addVirtualRegisterKill - Add information about the fact that the specified
//===--------------------------------------------------------------------===//
// API to update live variable information
/// addVirtualRegisterKilled - Add information about the fact that the
/// specified register is killed after being used by the specified
/// instruction.
///
void addVirtualRegisterKilled(unsigned IncomingReg, MachineInstr *MI) {
RegistersKilled.insert(std::make_pair(MI, IncomingReg));
}
/// removeVirtualRegistersKilled - Remove all of the specified killed
/// registers from the live variable information.
void removeVirtualRegistersKilled(killed_iterator B, killed_iterator E) {
RegistersKilled.erase(B, E);
}
/// addVirtualRegisterDead - Add information about the fact that the specified
/// register is dead after being used by the specified instruction.
///
void addVirtualRegisterKill(unsigned IncomingReg, MachineInstr *MI) {
void addVirtualRegisterDead(unsigned IncomingReg, MachineInstr *MI) {
RegistersDead.insert(std::make_pair(MI, IncomingReg));
}
/// removeVirtualRegistersKilled - Remove all of the specified killed
/// registers from the live variable information.
void removeVirtualRegistersDead(killed_iterator B, killed_iterator E) {
RegistersDead.erase(B, E);
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}