[lldb] [compiler-rt] [clang-tools-extra] [libcxxabi] [flang] [libc] [lld] [llvm] [libcxx] [clang] [RISCV] Support Global Dynamic TLSDESC in the RISC-V backend (PR #66915)

[Fangrui Song via cfe-commits]

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@@ -71,6 +71,18 @@ enum Fixups {
   // Used to generate an R_RISCV_ALIGN relocation, which indicates the linker
   // should fixup the alignment after linker relaxation.
   fixup_riscv_align,
+  // 20-bit fixup corresponding to %tlsdesc_hi(foo) for instructions like
+  // auipc
+  fixup_riscv_tlsdesc_hi20,
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MaskRay wrote:

I wonder whether we can just use `MCFixupKind(FirstLiteralRelocationKind + ELF::R_RISCV_TLSDESC_CALL)`

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