[lld] [ELF] Fix IRELATIVE addend if the resolver address is updated by linker relaxation (PR #179063)

[Jessica Clarke via llvm-commits]

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@@ -0,0 +1,53 @@
+# REQUIRES: loongarch
+# RUN: llvm-mc -filetype=obj -triple=loongarch64 -mattr=+relax %s -o %t.o
+# RUN: ld.lld -pie %t.o -o %t
+# RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
+# RUN: llvm-readelf -s %t | FileCheck --check-prefix=SYM %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefix=DIS %s
+
+## ifunc0 has a direct relocation, so it gets canonicalized to the IPLT entry.
+## ifunc1 has only a GOT relocation, so its symbols remains in the original section.
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jrtc27 wrote:

```suggestion
## ifunc1 has only a GOT relocation, so its symbol remains in the original section.
```

https://github.com/llvm/llvm-project/pull/179063