[lld] [ELF] Support relocatable files using CREL (PR #98115)

[Fangrui Song via llvm-commits]

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@@ -374,6 +376,8 @@ template <class ELFT>
 bool ICF<ELFT>::equalsVariable(const InputSection *a, const InputSection *b) {
   const RelsOrRelas<ELFT> ra = a->template relsOrRelas<ELFT>();
   const RelsOrRelas<ELFT> rb = b->template relsOrRelas<ELFT>();
+  if (ra.areRelocsCrel())
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MaskRay wrote:

Not needed. The double rel check is for https://github.com/llvm/llvm-project/commit/686cff17cc310884e48ae963bf7507f96950cc90 .

An early areRelocsCrel() issue would not run into that issue.

https://github.com/llvm/llvm-project/pull/98115