[clang] [llvm] [RISCV] Add Zicfiss support to the shadow call stack implementation. (PR #68075)

[Paul Kirth via llvm-commits]

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@@ -1044,3 +1044,8 @@ def FeatureTaggedGlobals : SubtargetFeature<"tagged-globals",
     "AllowTaggedGlobals",
     "true", "Use an instruction sequence for taking the address of a global "
     "that allows a memory tag in the upper address bits">;
+
+def FeatureForcedSWShadowStack : SubtargetFeature<
+    "forced-sw-shadow-stack", "HasForcedSWShadowStack", "true",
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ilovepi wrote:

Should the default be `false`?

https://github.com/llvm/llvm-project/pull/68075