[lld] [ELF] Handle and optimize x86-64 PLTOFF64 TLS sequences (PR #216263)

[Fangrui Song via llvm-commits]

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@@ -1006,6 +1038,19 @@ void X86_64::relaxTlsLdToLe(uint8_t *loc, const Relocation &rel,
     return;
   }
 
+  if (isPltOff64Tls(loc)) {
+    // Convert the sequence to
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MaskRay wrote:

Done

https://github.com/llvm/llvm-project/pull/216263