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LiveIntervals: Add removeAllRegUnitsForPhysReg 

Convenience wrapper for removing the reg units of
a physical register.

llvm-svn: 354685
This commit is contained in:
Matt Arsenault 2019-02-22 19:03:31 +00:00
parent a5e68748bf
commit 45cfe9822d
1 changed files with 9 additions and 0 deletions
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9
llvm/include/llvm/CodeGen/LiveIntervals.h
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@ -417,6 +417,15 @@ class VirtRegMap;
RegUnitRanges[Unit] = nullptr;
}
/// Remove associated live ranges for the register units associated with \p
/// Reg. Subsequent uses should rely on on-demand recomputation. \note This
/// method can result in inconsistent liveness tracking if multiple phyical
/// registers share a regunit, and should be used cautiously.
void removeAllRegUnitsForPhysReg(unsigned Reg) {
for (MCRegUnitIterator Units(Reg, TRI); Units.isValid(); ++Units)
removeRegUnit(*Units);
}
/// Remove value numbers and related live segments starting at position
/// \p Pos that are part of any liverange of physical register \p Reg or one
/// of its subregisters.