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Handle all live physreg defs in the same place.

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SelectionDAG has 4 different ways of passing physreg defs to users.
Collect all of the uses at the same time, and pass all of them to
MI->setPhysRegsDeadExcept() to mark the remaining defs dead.

The setPhysRegsDeadExcept() function will soon add the required
implicit-defs to instructions with register mask operands.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149708 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-02-03 20:43:35 +00:00
parent ee8901c08f
commit 59cb77fb11
2 changed files with 47 additions and 44 deletions
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2
lib/CodeGen/MachineInstr.cpp
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@@ -1799,7 +1799,7 @@ void MachineInstr::setPhysRegsDeadExcept(const SmallVectorImpl<unsigned> &UsedRe
MachineOperand &MO = getOperand(i);
if (!MO.isReg() || !MO.isDef()) continue;
unsigned Reg = MO.getReg();
if (Reg == 0) continue;
if (!TargetRegisterInfo::isPhysicalRegister(Reg)) continue;
bool Dead = true;
for (SmallVectorImpl<unsigned>::const_iterator I = UsedRegs.begin(),
E = UsedRegs.end(); I != E; ++I)