[llvm] [AMDGPU] Compiler should synthesize private buffer resource descriptor from flat_scratch_init (PR #79586)

[Matt Arsenault via llvm-commits]

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@@ -407,7 +408,7 @@ void SIFrameLowering::emitEntryFunctionFlatScratchInit(
 
     // Find unused reg to load flat scratch init into
     MachineRegisterInfo &MRI = MF.getRegInfo();
-    Register FlatScrInit = AMDGPU::NoRegister;
+    Register FlatScratchInitReg = AMDGPU::NoRegister;
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arsenm wrote:

Initialization is unnecessary

https://github.com/llvm/llvm-project/pull/79586