[llvm] [clang] [compiler-rt] [AArch64][SME] Add support for sme-fa64 (PR #70809)

[Sander de Smalen via cfe-commits]

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@@ -491,13 +491,15 @@ bool AArch64Subtarget::isStreamingCompatible() const {
 }
 
 bool AArch64Subtarget::isNeonAvailable() const {
-  return hasNEON() && !isStreaming() && !isStreamingCompatible();
+  if (hasSMEFA64())
+    return true;
+  return (hasNEON() && !isStreaming() && !isStreamingCompatible());
 }
 
-bool AArch64Subtarget::isSVEAvailable() const{
-  // FIXME: Also return false if FEAT_FA64 is set, but we can't do this yet
-  // as we don't yet support the feature in LLVM.
-  return hasSVE() && !isStreaming() && !isStreamingCompatible();
+bool AArch64Subtarget::isSVEAvailable() const {
+  if (hasSMEFA64())
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sdesmalen-arm wrote:

Like above, this also needs to check for `hasSVE()`

https://github.com/llvm/llvm-project/pull/70809