[lld] [lld-macho] Category merger: handle addends when getting symbol at offset (PR #91238)

[via llvm-commits]

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@@ -0,0 +1,357 @@
+# REQUIRES: aarch64
+# RUN: rm -rf %t; mkdir %t && cd %t
+
+############ Test merging multiple categories into a single category ############
+## Apply category merging to swiftc code just make sure we can handle addends
+## and don't erase cateogry names for swift -- in order to not crash
+# RUN: llvm-mc -filetype=obj -triple=arm64-apple-macos -o cat_swift.o %s
+# RUN: %lld -arch arm64 -dylib -o cat_swift.dylib cat_swift.o -objc_category_merging
+
+;  ================== Generated from Swift: ==================
+;; > xcrun swiftc -S SimpleClass.swift -o SimpleClass.s
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alx32 wrote:

I added the below - is that what you mean ? It's XCode16 Beta 1.
```
;; > xcrun swiftc --version
;; swift-driver version: 1.109.2 Apple Swift version 6.0 (swiftlang-6.0.0.3.300 clang-1600.0.20.10)
```

https://github.com/llvm/llvm-project/pull/91238