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llvm-svn: 19209
This commit is contained in:
Chris Lattner 2005-01-01 15:58:55 +00:00
parent 7f004e59d8
commit 70d0a6155b
1 changed files with 10 additions and 0 deletions
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10
include/llvm/CodeGen/LiveVariables.h
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@ -125,6 +125,16 @@ public:
return RegistersKilled.equal_range(MI);
}
/// KillsRegister - Return true if the specified instruction kills the
/// specified register.
bool KillsRegister(MachineInstr *MI, unsigned Reg) {
std::pair<killed_iterator, killed_iterator> KIP = killed_range(MI);
for (; KIP.first != KIP.second; ++KIP.first)
if (KIP.first->second == Reg)
return true;
return false;
}
killed_iterator dead_begin(MachineInstr *MI) {
return RegistersDead.lower_bound(MI);
}