[clang] [llvm] [AArch64] Stack probing for function prologues (PR #66524)

[Momchil Velikov via cfe-commits]

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@@ -97,14 +97,45 @@ AArch64FunctionInfo::AArch64FunctionInfo(const Function &F,
     if (const auto *BTE = mdconst::extract_or_null<ConstantInt>(
             F.getParent()->getModuleFlag("branch-target-enforcement")))
       BranchTargetEnforcement = BTE->getZExtValue();
-    return;
+  } else {
+    const StringRef BTIEnable =
+        F.getFnAttribute("branch-target-enforcement").getValueAsString();
+    assert(BTIEnable.equals_insensitive("true") ||
+           BTIEnable.equals_insensitive("false"));
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momchil-velikov wrote:

This is not a part of this patch series (it just moved a bit). I've created 
https://github.com/llvm/llvm-project/pull/70565

https://github.com/llvm/llvm-project/pull/66524
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