[llvm] [CFI][stackprobe] Shrink wrapper select safe prologue insertion block when inline stack probing is enabled (PR #81676)

[via llvm-commits]

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@@ -957,6 +957,15 @@ bool ShrinkWrap::runOnMachineFunction(MachineFunction &MF) {
   if (!ArePointsInteresting())
     return Changed;
 
+  const TargetLowering *TLI = MF.getSubtarget().getTargetLowering();
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yozhu wrote:

> Thus we can set this variable for blocks with NZCV live-in

A block with NZCV live-in wouldn't necessarily be selected for prologue insertion, so `StackAddressUsed` still need to be calculated by iterating through and examining each instruction.

https://github.com/llvm/llvm-project/pull/81676