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RAGreedy: Keep track of allocated PhysRegs internally

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Do not use MachineRegisterInfo::setPhysRegUsed()/isPhysRegUsed()
anymore. This bitset changes function-global state and is set by the
VirtRegRewriter anyway.
Simply use a bitvector private to RAGreedy.

Differential Revision: http://reviews.llvm.org/D10910

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242169 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun
2015-07-14 17:38:17 +00:00
parent 582194d3b8
commit 65a4053af8
4 changed files with 40 additions and 18 deletions
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8
lib/CodeGen/LiveRegMatrix.cpp
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@ -131,6 +131,14 @@ void LiveRegMatrix::unassign(LiveInterval &VirtReg) {
DEBUG(dbgs() << '\n');
}
bool LiveRegMatrix::isPhysRegUsed(unsigned PhysReg) const {
for (MCRegUnitIterator Unit(PhysReg, TRI); Unit.isValid(); ++Unit) {
if (!Matrix[*Unit].empty())
return true;
}
return false;
}
bool LiveRegMatrix::checkRegMaskInterference(LiveInterval &VirtReg,
unsigned PhysReg) {
// Check if the cached information is valid.