[llvm] [PowerPC] Utilize `getReservedRegs` to find asm clobberable registers. (PR #99766)

[Chen Zheng via llvm-commits]

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@@ -3432,6 +3432,8 @@ SDValue PPCTargetLowering::LowerGlobalTLSAddressAIX(SDValue Op,
   if (Subtarget.hasAIXShLibTLSModelOpt())
     updateForAIXShLibTLSModelOpt(Model, DAG, getTargetMachine());
 
+  setUsesTOCBasePtr(DAG);
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chenzheng1030 wrote:

good catch!
Can this be made in a single patch?

https://github.com/llvm/llvm-project/pull/99766