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Allow for live in registers for eh landing pads. 

llvm-svn: 34475
This commit is contained in:
Jim Laskey 2007-02-21 22:41:17 +00:00
parent dbe2491c44
commit 5b2b7c1024
2 changed files with 9 additions and 6 deletions
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4
llvm/include/llvm/CodeGen/LiveIntervalAnalysis.h
View File

@ -240,7 +240,9 @@ namespace llvm {
unsigned SrcReg);
/// handleLiveInRegister - Create interval for a livein register.
void handleLiveInRegister(MachineBasicBlock* mbb, LiveInterval &interval);
void handleLiveInRegister(MachineBasicBlock* mbb,
unsigned MIIdx,
LiveInterval &interval);
/// Return true if the two specified registers belong to different
/// register classes. The registers may be either phys or virt regs.

11
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
View File

@ -658,14 +658,15 @@ void LiveIntervals::handleRegisterDef(MachineBasicBlock *MBB,
}
void LiveIntervals::handleLiveInRegister(MachineBasicBlock *MBB,
unsigned MIIdx,
LiveInterval &interval) {
DOUT << "\t\tlivein register: "; DEBUG(printRegName(interval.reg));
// Look for kills, if it reaches a def before it's killed, then it shouldn't
// be considered a livein.
MachineBasicBlock::iterator mi = MBB->begin();
unsigned baseIndex = 0;
unsigned start = 0;
unsigned baseIndex = MIIdx;
unsigned start = baseIndex;
unsigned end = start;
while (mi != MBB->end()) {
if (lv_->KillsRegister(mi, interval.reg)) {
@ -690,8 +691,8 @@ exit:
assert(start < end && "did not find end of interval?");
LiveRange LR(start, end, interval.getNextValue(~0U, 0));
interval.addRange(LR);
DOUT << " +" << LR << '\n';
interval.addRange(LR);
}
/// computeIntervals - computes the live intervals for virtual
@ -715,9 +716,9 @@ void LiveIntervals::computeIntervals() {
// Create intervals for live-ins to this BB first.
for (MachineBasicBlock::const_livein_iterator LI = MBB->livein_begin(),
LE = MBB->livein_end(); LI != LE; ++LI) {
handleLiveInRegister(MBB, getOrCreateInterval(*LI));
handleLiveInRegister(MBB, MIIndex, getOrCreateInterval(*LI));
for (const unsigned* AS = mri_->getAliasSet(*LI); *AS; ++AS)
handleLiveInRegister(MBB, getOrCreateInterval(*AS));
handleLiveInRegister(MBB, MIIndex, getOrCreateInterval(*AS));
}
}