Have MachineFunction cache a pointer to the subtarget to make lookups

shorter/easier and have the DAG use that to do the same lookup. This
can be used in the future for TargetMachine based caching lookups from
the MachineFunction easily.

Update the MIPS subtarget switching machinery to update this pointer
at the same time it runs.

llvm-svn: 214838

1 files changed, 3 insertions, 6 deletions

diff --git a/llvm/lib/Target/Sparc/SparcFrameLowering.cpp b/llvm/lib/Target/Sparc/SparcFrameLowering.cpp
index 16db387..1b67b4b 100644
--- a/llvm/lib/Target/Sparc/SparcFrameLowering.cpp
+++ b/llvm/lib/Target/Sparc/SparcFrameLowering.cpp
@@ -46,8 +46,7 @@ void SparcFrameLowering::emitSPAdjustment(MachineFunction &MF,
 
   DebugLoc dl = (MBBI != MBB.end()) ? MBBI->getDebugLoc() : DebugLoc();
   const SparcInstrInfo &TII =
-      *static_cast<const SparcInstrInfo *>(
-          MF.getTarget().getSubtargetImpl()->getInstrInfo());
+      *static_cast<const SparcInstrInfo *>(MF.getSubtarget().getInstrInfo());
 
   if (NumBytes >= -4096 && NumBytes < 4096) {
     BuildMI(MBB, MBBI, dl, TII.get(ADDri), SP::O6)
@@ -89,8 +88,7 @@ void SparcFrameLowering::emitPrologue(MachineFunction &MF) const {
   MachineBasicBlock &MBB = MF.front();
   MachineFrameInfo *MFI = MF.getFrameInfo();
   const SparcInstrInfo &TII =
-      *static_cast<const SparcInstrInfo *>(
-          MF.getTarget().getSubtargetImpl()->getInstrInfo());
+      *static_cast<const SparcInstrInfo *>(MF.getSubtarget().getInstrInfo());
   MachineBasicBlock::iterator MBBI = MBB.begin();
   DebugLoc dl = MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc();
 
@@ -155,8 +153,7 @@ void SparcFrameLowering::emitEpilogue(MachineFunction &MF,
   SparcMachineFunctionInfo *FuncInfo = MF.getInfo<SparcMachineFunctionInfo>();
   MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
   const SparcInstrInfo &TII =
-      *static_cast<const SparcInstrInfo *>(
-          MF.getTarget().getSubtargetImpl()->getInstrInfo());
+      *static_cast<const SparcInstrInfo *>(MF.getSubtarget().getInstrInfo());
   DebugLoc dl = MBBI->getDebugLoc();
   assert(MBBI->getOpcode() == SP::RETL &&
          "Can only put epilog before 'retl' instruction!");