[llvm] [AArch64][Windows] Fix swift async context slot placement (PR #212922)

[Saleem Abdulrasool via llvm-commits]

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@@ -1021,6 +1021,25 @@ void AArch64PrologueEmitter::emitFramePointerSetup(
   if (CombineSPBump)
     FPOffset += AFI->getLocalStackSize();
 
+#ifndef NDEBUG
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compnerd wrote:

This is definitely the wrong condition to gate this check on.

https://github.com/llvm/llvm-project/pull/212922