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

[Sander de Smalen via cfe-commits]

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@@ -491,13 +491,13 @@ bool AArch64Subtarget::isStreamingCompatible() const {
 }
 
 bool AArch64Subtarget::isNeonAvailable() const {
-  return hasNEON() && !isStreaming() && !isStreamingCompatible();
+  return (hasNEON() || hasSMEFA64()) && !isStreaming() &&
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sdesmalen-arm wrote:

There are no tests for the changes in this file. These changes are really the 
reason for adding this feature, and it's important to test it.

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