[llvm] [llvm] Support IFuncs on Darwin platforms (PR #73686)

[Amara Emerson via llvm-commits]

================
@@ -0,0 +1,82 @@
+; RUN: llc -mtriple=arm64-unknown-linux-gnu %s -filetype=asm -o - | FileCheck %s --check-prefixes=ELF
+; RUN: llc -mtriple=arm64-apple-darwin %s -filetype=asm -o - -arm64-darwin-ifunc-symbol_resolver=always | FileCheck %s --check-prefixes=MACHO,MACHO-LINKER
+; RUN: llc -mtriple=arm64-apple-darwin %s -filetype=asm -o - -arm64-darwin-ifunc-symbol_resolver=if_supported | FileCheck %s --check-prefixes=MACHO,MACHO-DEFAULT
+; RUN: llc -mtriple=arm64-apple-darwin %s -filetype=asm -o - -arm64-darwin-ifunc-symbol_resolver=never | FileCheck %s --check-prefixes=MACHO,MACHO-MANUAL
+; RUN: llc -mtriple=arm64-apple-darwin %s -filetype=asm -o - | FileCheck %s --check-prefixes=MACHO,MACHO-MANUAL
----------------
aemerson wrote:

Needs a RUN line with -global-isel too for end-to-end tests.

https://github.com/llvm/llvm-project/pull/73686