Convert Alpha and Mips to use a MachineFunctionInfo subclass to
carry GlobalBaseReg, and GlobalRetAddr too in Alpha's case. This
eliminates the need for them to search through the
MachineRegisterInfo livein list in order to identify these
virtual registers. EmitLiveInCopies is now the only user of the
virtual register portion of MachineRegisterInfo's livein data.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72802 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsISelDAGToDAG.cpp b/lib/Target/Mips/MipsISelDAGToDAG.cpp
index f05ac70..53de1bb 100644
--- a/lib/Target/Mips/MipsISelDAGToDAG.cpp
+++ b/lib/Target/Mips/MipsISelDAGToDAG.cpp
@@ -70,7 +70,19 @@
// Include the pieces autogenerated from the target description.
#include "MipsGenDAGISel.inc"
- SDValue getGlobalBaseReg();
+ /// getTargetMachine - Return a reference to the TargetMachine, casted
+ /// to the target-specific type.
+ const MipsTargetMachine &getTargetMachine() {
+ return static_cast<const MipsTargetMachine &>(TM);
+ }
+
+ /// getInstrInfo - Return a reference to the TargetInstrInfo, casted
+ /// to the target-specific type.
+ const MipsInstrInfo *getInstrInfo() {
+ return getTargetMachine().getInstrInfo();
+ }
+
+ SDNode *getGlobalBaseReg();
SDNode *Select(SDValue N);
// Complex Pattern.
@@ -116,19 +128,10 @@
/// getGlobalBaseReg - Output the instructions required to put the
/// GOT address into a register.
-SDValue MipsDAGToDAGISel::getGlobalBaseReg() {
- MachineFunction* MF = BB->getParent();
- unsigned GP = 0;
- for(MachineRegisterInfo::livein_iterator ii = MF->getRegInfo().livein_begin(),
- ee = MF->getRegInfo().livein_end(); ii != ee; ++ii)
- if (ii->first == Mips::GP) {
- GP = ii->second;
- break;
- }
- assert(GP && "GOT PTR not in liveins");
- // FIXME is there a sensible place to get debug info for this?
- return CurDAG->getCopyFromReg(CurDAG->getEntryNode(),
- DebugLoc::getUnknownLoc(), GP, MVT::i32);
+SDNode *MipsDAGToDAGISel::getGlobalBaseReg() {
+ MachineFunction *MF = BB->getParent();
+ unsigned GlobalBaseReg = getInstrInfo()->getGlobalBaseReg(MF);
+ return CurDAG->getRegister(GlobalBaseReg, TLI.getPointerTy()).getNode();
}
/// ComplexPattern used on MipsInstrInfo
@@ -321,11 +324,8 @@
}
// Get target GOT address.
- case ISD::GLOBAL_OFFSET_TABLE: {
- SDValue Result = getGlobalBaseReg();
- ReplaceUses(N, Result);
- return NULL;
- }
+ case ISD::GLOBAL_OFFSET_TABLE:
+ return getGlobalBaseReg();
/// Handle direct and indirect calls when using PIC. On PIC, when
/// GOT is smaller than about 64k (small code) the GA target is