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Remove liveout lists from MachineRegisterInfo.

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All targets are now adding return value registers as implicit uses on
return instructions, and there is no longer a need for the live out
lists.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174417 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2013-02-05 18:21:56 +00:00
parent b45e4deb10
commit e6dc59891f
4 changed files with 6 additions and 27 deletions
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15
include/llvm/CodeGen/MachineRegisterInfo.h
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@@ -99,13 +99,11 @@ class MachineRegisterInfo {
/// started.
BitVector ReservedRegs;
/// LiveIns/LiveOuts - Keep track of the physical registers that are
/// livein/liveout of the function. Live in values are typically arguments in
/// registers, live out values are typically return values in registers.
/// LiveIn values are allowed to have virtual registers associated with them,
/// stored in the second element.
/// Keep track of the physical registers that are live in to the function.
/// Live in values are typically arguments in registers, live out values are
/// typically return values in registers. LiveIn values are allowed to have
/// virtual registers associated with them, stored in the second element.
std::vector<std::pair<unsigned, unsigned> > LiveIns;
std::vector<unsigned> LiveOuts;
MachineRegisterInfo(const MachineRegisterInfo&) LLVM_DELETED_FUNCTION;
void operator=(const MachineRegisterInfo&) LLVM_DELETED_FUNCTION;
@@ -468,7 +466,6 @@ public:
void addLiveIn(unsigned Reg, unsigned vreg = 0) {
LiveIns.push_back(std::make_pair(Reg, vreg));
}
void addLiveOut(unsigned Reg) { LiveOuts.push_back(Reg); }
// Iteration support for live in/out sets. These sets are kept in sorted
// order by their register number.
@@ -478,12 +475,8 @@ public:
livein_iterator livein_begin() const { return LiveIns.begin(); }
livein_iterator livein_end() const { return LiveIns.end(); }
bool livein_empty() const { return LiveIns.empty(); }
liveout_iterator liveout_begin() const { return LiveOuts.begin(); }
liveout_iterator liveout_end() const { return LiveOuts.end(); }
bool liveout_empty() const { return LiveOuts.empty(); }
bool isLiveIn(unsigned Reg) const;
bool isLiveOut(unsigned Reg) const;
/// getLiveInPhysReg - If VReg is a live-in virtual register, return the
/// corresponding live-in physical register.