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TargetRegisterInfo: Provide a way to check assigned registers in getRegAllocationHints()

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Pass a const reference to LiveRegMatrix to getRegAllocationHints()
because some targets can prodive better hints if they can test whether a
physreg has been used for register allocation yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242340 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matthias Braun
2015-07-15 22:16:00 +00:00
parent 71da3635d9
commit 2aa5727755
8 changed files with 19 additions and 10 deletions
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5
lib/CodeGen/AllocationOrder.cpp
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@@ -29,12 +29,13 @@ using namespace llvm;
// Compare VirtRegMap::getRegAllocPref().
AllocationOrder::AllocationOrder(unsigned VirtReg,
const VirtRegMap &VRM,
const RegisterClassInfo &RegClassInfo)
const RegisterClassInfo &RegClassInfo,
const LiveRegMatrix *Matrix)
: Pos(0) {
const MachineFunction &MF = VRM.getMachineFunction();
const TargetRegisterInfo *TRI = &VRM.getTargetRegInfo();
Order = RegClassInfo.getOrder(MF.getRegInfo().getRegClass(VirtReg));
TRI->getRegAllocationHints(VirtReg, Order, Hints, MF, &VRM);
TRI->getRegAllocationHints(VirtReg, Order, Hints, MF, &VRM, Matrix);
rewind();
DEBUG({