Revert "Delete the wrong flag NEEDS_TLSGD_TO_IE in the extreme code model."

This reverts commit baee006.

Author: ylzsx

lld/ELF/Relocations.cpp

@@ -1453,17 +1453,7 @@ unsigned RelocationScanner::handleTlsRelocation(RelExpr expr, RelType type,
     // label, so TLSDESC=>IE will be categorized as R_RELAX_TLS_GD_TO_LE. We fix
     // the categorization in RISCV::relocateAllosec->
     if (sym.isPreemptible) {
-      // In LoongArch, TLSDESC code sequences share relocations
-      // R_LARCH_TLS_DESC_PC_HI20 and R_LARCH_TLS_DESC_PC_LO12 in
-      // normal/medium/extreme code model. Since the extreme code model cannot
-      // be optimized to IE/LE, the flag NEEDS_TLSGD_TO_IE added previously
-      // needs to be cleared.
-      // In extreme code model, R_LARCH_TLS_DESC64_LO20 and
-      // R_LARCH_TLS_DESC64_HI12 will set NEEDS_TLSDESC flag.
-      if (ctx.arg.emachine == EM_LOONGARCH && sym.hasFlag(NEEDS_TLSDESC))
-        sym.clearFlags(NEEDS_TLSGD_TO_IE);
-      else
-        sym.setFlags(NEEDS_TLSGD_TO_IE);
+      sym.setFlags(NEEDS_TLSGD_TO_IE);
       sec->addReloc({ctx.target->adjustTlsExpr(type, R_RELAX_TLS_GD_TO_IE),
                      type, offset, addend, &sym});
     } else {

lld/ELF/Symbols.h

@@ -342,9 +342,6 @@ class Symbol {
   void setFlags(uint16_t bits) {
     flags.fetch_or(bits, std::memory_order_relaxed);
   }
-  void clearFlags(uint16_t bits) {
-    flags.fetch_and(~bits, std::memory_order_relaxed);
-  }
   bool hasFlag(uint16_t bit) const {
     assert(llvm::has_single_bit(bit) && "bit must be a power of 2");
     return flags.load(std::memory_order_relaxed) & bit;