[llvm] [SystemZ] Remove unnecessary casts (NFC) (PR #148534)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-systemz

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>

getInstrInfo() already returns const SystemZInstrInfo *.


---
Full diff: https://github.com/llvm/llvm-project/pull/148534.diff


1 Files Affected:

- (modified) llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp (+3-3) 


``````````diff
diff --git a/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp b/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
index 4bef8ff9bbac1..6297916310803 100644
--- a/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
+++ b/llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
@@ -533,7 +533,7 @@ void SystemZELFFrameLowering::emitPrologue(MachineFunction &MF,
   const SystemZSubtarget &STI = MF.getSubtarget<SystemZSubtarget>();
   const SystemZTargetLowering &TLI = *STI.getTargetLowering();
   MachineFrameInfo &MFFrame = MF.getFrameInfo();
-  auto *ZII = static_cast<const SystemZInstrInfo *>(STI.getInstrInfo());
+  auto *ZII = STI.getInstrInfo();
   SystemZMachineFunctionInfo *ZFI = MF.getInfo<SystemZMachineFunctionInfo>();
   MachineBasicBlock::iterator MBBI = MBB.begin();
   const MCRegisterInfo *MRI = MF.getContext().getRegisterInfo();
@@ -1239,7 +1239,7 @@ void SystemZXPLINKFrameLowering::emitPrologue(MachineFunction &MF,
   const SystemZSubtarget &Subtarget = MF.getSubtarget<SystemZSubtarget>();
   SystemZMachineFunctionInfo *ZFI = MF.getInfo<SystemZMachineFunctionInfo>();
   MachineBasicBlock::iterator MBBI = MBB.begin();
-  auto *ZII = static_cast<const SystemZInstrInfo *>(Subtarget.getInstrInfo());
+  auto *ZII = Subtarget.getInstrInfo();
   auto &Regs = Subtarget.getSpecialRegisters<SystemZXPLINK64Registers>();
   MachineFrameInfo &MFFrame = MF.getFrameInfo();
   MachineInstr *StoreInstr = nullptr;
@@ -1354,7 +1354,7 @@ void SystemZXPLINKFrameLowering::emitEpilogue(MachineFunction &MF,
   MachineBasicBlock::iterator MBBI = MBB.getLastNonDebugInstr();
   SystemZMachineFunctionInfo *ZFI = MF.getInfo<SystemZMachineFunctionInfo>();
   MachineFrameInfo &MFFrame = MF.getFrameInfo();
-  auto *ZII = static_cast<const SystemZInstrInfo *>(Subtarget.getInstrInfo());
+  auto *ZII = Subtarget.getInstrInfo();
   auto &Regs = Subtarget.getSpecialRegisters<SystemZXPLINK64Registers>();
 
   // Skip the return instruction.

``````````

</details>


https://github.com/llvm/llvm-project/pull/148534