[mips] Expose adjustStackPtr() from MipsInstrInfo. NFC.

Summary:
adjustStackPtr() is implemented from both MipsSEInstrInfo and
Mips16InstrInfo. It makes sense to expose this function from
MipsInstrInfo and avoid explicit casting in some cases.

Depends on D8638.

Reviewers: dsanders

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8640

llvm-svn: 233905

1 files changed, 1 insertions, 4 deletions

diff --git a/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp b/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp
index 7c79c4c564a..31ee78213cf 100644
--- a/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsSEFrameLowering.cpp
@@ -611,9 +611,6 @@ MipsSEFrameLowering::hasReservedCallFrame(const MachineFunction &MF) const {
 void MipsSEFrameLowering::
 eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
                               MachineBasicBlock::iterator I) const {
-  const MipsSEInstrInfo &TII =
-      *static_cast<const MipsSEInstrInfo *>(STI.getInstrInfo());
-
   if (!hasReservedCallFrame(MF)) {
     int64_t Amount = I->getOperand(0).getImm();
 
@@ -621,7 +618,7 @@ eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
       Amount = -Amount;
 
     unsigned SP = STI.isABI_N64() ? Mips::SP_64 : Mips::SP;
-    TII.adjustStackPtr(SP, Amount, MBB, I);
+    STI.getInstrInfo()->adjustStackPtr(SP, Amount, MBB, I);
   }
 
   MBB.erase(I);