[clang] [llvm] [AArch64] Stack probing for dynamic allocas in SelectionDAG (PR #66525)

[Sam Tebbs via cfe-commits]

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@@ -9461,6 +9462,94 @@ bool AArch64InstrInfo::isReallyTriviallyReMaterializable(
   return TargetInstrInfo::isReallyTriviallyReMaterializable(MI);
 }
 
+MachineBasicBlock::iterator
+AArch64InstrInfo::probedStackAlloc(MachineBasicBlock::iterator MBBI,
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SamTebbs33 wrote:

I think it would be useful for this function to have some comments that explain what it emits, so it can be understood isolated from the rest of this patch.

https://github.com/llvm/llvm-project/pull/66525