[clang] [llvm] [ARM][KCFI] Add backend support for Kernel Control-Flow Integrity (PR #163698)

[Kees Cook via cfe-commits]

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@@ -530,6 +534,9 @@ void ARMPassConfig::addPreEmitPass() {
 }
 
 void ARMPassConfig::addPreEmitPass2() {
+  // Unpack KCFI bundles before AsmPrinter
+  addPass(createUnpackMachineBundles(nullptr));
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kees wrote:

Ah! Yes it can. I've consolidate this and added a kcfi-checking predicate like done in X86 and RiscV.

https://github.com/llvm/llvm-project/pull/163698