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author | Evan Cheng <evan.cheng@apple.com> | 2009-06-14 20:22:55 +0000 |
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committer | Evan Cheng <evan.cheng@apple.com> | 2009-06-14 20:22:55 +0000 |
commit | 90f95f88c6ce09c6744777dc9d140c3c77203b92 (patch) | |
tree | 3996a490bf685eea1de9b1579d28f69500dbf8a6 /lib/CodeGen/VirtRegMap.cpp | |
parent | caf6b2bbaf40580596e974b5eee0a7e59b58bd98 (diff) | |
download | external_llvm-90f95f88c6ce09c6744777dc9d140c3c77203b92.zip external_llvm-90f95f88c6ce09c6744777dc9d140c3c77203b92.tar.gz external_llvm-90f95f88c6ce09c6744777dc9d140c3c77203b92.tar.bz2 |
Move register allocation preference (or hint) from LiveInterval to MachineRegisterInfo. This allows more passes to set them.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73346 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.cpp')
-rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index 29637b9..87d75dd 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -51,6 +51,7 @@ static RegisterPass<VirtRegMap> X("virtregmap", "Virtual Register Map"); bool VirtRegMap::runOnMachineFunction(MachineFunction &mf) { + MRI = &mf.getRegInfo(); TII = mf.getTarget().getInstrInfo(); TRI = mf.getTarget().getRegisterInfo(); MF = &mf; @@ -98,6 +99,39 @@ void VirtRegMap::grow() { ImplicitDefed.resize(LastVirtReg-TargetRegisterInfo::FirstVirtualRegister+1); } +unsigned VirtRegMap::getRegAllocPref(unsigned virtReg) { + std::pair<MachineRegisterInfo::RegAllocHintType, unsigned> Hint = + MRI->getRegAllocationHint(virtReg); + switch (Hint.first) { + default: assert(0); + case MachineRegisterInfo::RA_None: + return 0; + case MachineRegisterInfo::RA_Preference: + if (TargetRegisterInfo::isPhysicalRegister(Hint.second)) + return Hint.second; + if (hasPhys(Hint.second)) + return getPhys(Hint.second); + case MachineRegisterInfo::RA_PairEven: { + unsigned physReg = Hint.second; + if (TargetRegisterInfo::isPhysicalRegister(physReg)) + return TRI->getRegisterPairEven(*MF, physReg); + else if (hasPhys(physReg)) + return TRI->getRegisterPairEven(*MF, getPhys(physReg)); + return 0; + } + case MachineRegisterInfo::RA_PairOdd: { + unsigned physReg = Hint.second; + if (TargetRegisterInfo::isPhysicalRegister(physReg)) + return TRI->getRegisterPairOdd(*MF, physReg); + else if (hasPhys(physReg)) + return TRI->getRegisterPairOdd(*MF, getPhys(physReg)); + return 0; + } + } + // Shouldn't reach here. + return 0; +} + int VirtRegMap::assignVirt2StackSlot(unsigned virtReg) { assert(TargetRegisterInfo::isVirtualRegister(virtReg)); assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT && @@ -213,8 +247,7 @@ void VirtRegMap::RemoveMachineInstrFromMaps(MachineInstr *MI) { /// FindUnusedRegisters - Gather a list of allocatable registers that /// have not been allocated to any virtual register. -bool VirtRegMap::FindUnusedRegisters(const TargetRegisterInfo *TRI, - LiveIntervals* LIs) { +bool VirtRegMap::FindUnusedRegisters(LiveIntervals* LIs) { unsigned NumRegs = TRI->getNumRegs(); UnusedRegs.reset(); UnusedRegs.resize(NumRegs); |