[lld] [lld][LoongArch] Relax R_LARCH_PCALA_HI20 and R_LARCH_PCALA_LO12 (PR #112696)

[via llvm-commits]

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@@ -38,11 +72,16 @@ class LoongArch final : public TargetInfo {
   bool usesOnlyLowPageBits(RelType type) const override;
   void relocate(uint8_t *loc, const Relocation &rel,
                 uint64_t val) const override;
+  void relocateAlloc(InputSectionBase &sec, uint8_t *buf) const override;
   bool relaxOnce(int pass) const override;
   void finalizeRelax(int passes) const override;
 };
 } // end anonymous namespace
 
+// The internal relocation number for local got relaxation which isn't part
+// of the psABI spec.
+#define INTERNAL_R_LARCH_PCALA_LO12 256
+
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ywgrit wrote:

> Redundant ?

Thanks, it's used in another relaxation case, which reminds me add the -Wunused compile option. 

https://github.com/llvm/llvm-project/pull/112696