[llvm-branch-commits] [lld] [lld][LoongArch] Convert TLS IE to LE in the normal or medium code model (PR #123680)

[Lu Weining via llvm-branch-commits]

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@@ -1002,6 +1008,87 @@ static bool relax(Ctx &ctx, InputSection &sec) {
   return changed;
 }
 
+// Convert TLS IE to LE in the normal or medium code model.
+// Original code sequence:
+//  * pcalau12i $a0, %ie_pc_hi20(sym)
+//  * ld.d      $a0, $a0, %ie_pc_lo12(sym)
+//
+// The code sequence converted is as follows:
+//  * lu12i.w   $a0, %le_hi20(sym)  # le_hi20 != 0, otherwise NOP
+//  * ori $a0   $a0, %le_lo12(sym)
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SixWeining wrote:

If `le_hi20` == 0, the source register of `ori` should be `$zero`, right?

https://github.com/llvm/llvm-project/pull/123680