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Now that MachineFunction/MachineBasicBlock keep a mapping of blocks to ID #'s

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use them instead of a local LiveVariables numbering


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14523 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-07-01 06:15:32 +00:00
parent 61e4cb3605
commit 8490f9c92e
2 changed files with 1 additions and 21 deletions
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20
lib/CodeGen/LiveVariables.cpp
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@ -37,22 +37,6 @@ using namespace llvm;
static RegisterAnalysis<LiveVariables> X("livevars", "Live Variable Analysis");
/// getIndexMachineBasicBlock() - Given a block index, return the
/// MachineBasicBlock corresponding to it.
MachineBasicBlock *LiveVariables::getIndexMachineBasicBlock(unsigned Idx) {
if (BBIdxMap.empty()) {
BBIdxMap.resize(BBMap.size());
for (std::map<MachineBasicBlock*, unsigned>::iterator I = BBMap.begin(),
E = BBMap.end(); I != E; ++I) {
assert(BBIdxMap.size() > I->second && "Indices are not sequential");
assert(BBIdxMap[I->second] == 0 && "Multiple idx collision!");
BBIdxMap[I->second] = I->first;
}
}
assert(Idx < BBIdxMap.size() && "BB Index out of range!");
return BBIdxMap[Idx];
}
LiveVariables::VarInfo &LiveVariables::getVarInfo(unsigned RegIdx) {
assert(MRegisterInfo::isVirtualRegister(RegIdx) &&
"getVarInfo: not a virtual register!");
@ -177,10 +161,6 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) {
AllocatablePhysicalRegisters[*I] = true; // The reg is allocatable!
}
// Build BBMap...
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
BBMap[I] = I->getNumber();
// PhysRegInfo - Keep track of which instruction was the last use of a
// physical register. This is a purely local property, because all physical
// register references as presumed dead across basic blocks.