[llvm] [AMDGPU] fix build error unused-var (PR #115199)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Gang Chen (cmc-rep)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/115199.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp b/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp
index f52476464e05e6..ac11b11ef97ae5 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUMachineFunction.cpp
@@ -103,7 +103,7 @@ unsigned AMDGPUMachineFunction::allocateLDSGlobal(const DataLayout &DL,
 
   unsigned Offset;
   if (GV.getAddressSpace() == AMDGPUAS::LOCAL_ADDRESS) {
-    if (TargetExtType *TTy = AMDGPU::isNamedBarrier(GV)) {
+    if (AMDGPU::isNamedBarrier(GV)) {
       std::optional<unsigned> BarAddr = getLDSAbsoluteAddress(GV);
       if (!BarAddr)
         llvm_unreachable("named barrier should have an assigned address");

``````````

</details>


https://github.com/llvm/llvm-project/pull/115199