[clang-tools-extra] [llvm] [RISCV] Support Global Dynamic TLSDESC in the RISC-V backend (PR #66915)

[Fangrui Song via cfe-commits]

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@@ -6843,6 +6845,24 @@ SDValue RISCVTargetLowering::getDynamicTLSAddr(GlobalAddressSDNode *N,
   return LowerCallTo(CLI).first;
 }
 
+SDValue
+RISCVTargetLowering::getGeneralDynamicTLSDescAddr(GlobalAddressSDNode *N,
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MaskRay wrote:

`GeneralDynamicTLSDesc` in the name` `getGeneralDynamicTLSDescAddr` is misleading. general-dynamic refers to a traditional TLS mode while TLSDESC is entirely different. 

https://github.com/llvm/llvm-project/pull/66915