[llvm] [AMDGPU] Simplify emitAtomicRMWLegalRemark. NFC. (PR #134614)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Jay Foad (jayfoad)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/134614.diff


1 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SIISelLowering.cpp (+2-2) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
index 21f8c7cfeec1f..356040da95672 100644
--- a/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -16723,8 +16723,8 @@ static bool atomicIgnoresDenormalModeOrFPModeIsFTZ(const AtomicRMWInst *RMW) {
 
 static OptimizationRemark emitAtomicRMWLegalRemark(const AtomicRMWInst *RMW) {
   LLVMContext &Ctx = RMW->getContext();
-  StringRef SS = Ctx.getSyncScopeName(RMW->getSyncScopeID()).value_or("");
-  StringRef MemScope = SS.empty() ? StringRef("system") : SS;
+  StringRef MemScope =
+      Ctx.getSyncScopeName(RMW->getSyncScopeID()).value_or("system");
 
   return OptimizationRemark(DEBUG_TYPE, "Passed", RMW)
          << "Hardware instruction generated for atomic "

``````````

</details>


https://github.com/llvm/llvm-project/pull/134614