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Teach local register allocator to deal with landing pad MBB's.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51647 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-05-28 17:22:32 +00:00
parent 73e4d594e7
commit 33d3d4ad40
2 changed files with 34 additions and 4 deletions
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8
lib/CodeGen/RegAllocLocal.cpp
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@ -549,10 +549,10 @@ void RALocal::AllocateBasicBlock(MachineBasicBlock &MBB) {
// If this is the first basic block in the machine function, add live-in
// registers as active.
if (&MBB == &*MF->begin()) {
for (MachineRegisterInfo::livein_iterator I=MF->getRegInfo().livein_begin(),
E = MF->getRegInfo().livein_end(); I != E; ++I) {
unsigned Reg = I->first;
if (&MBB == &*MF->begin() || MBB.isLandingPad()) {
for (MachineBasicBlock::livein_iterator I = MBB.livein_begin(),
E = MBB.livein_end(); I != E; ++I) {
unsigned Reg = *I;
MF->getRegInfo().setPhysRegUsed(Reg);
PhysRegsUsed[Reg] = 0; // It is free and reserved now
AddToPhysRegsUseOrder(Reg);