[llvm] [Sanitizers] Don't inline unpoisoning of small stacks when inlining disabled (PR #75555)

[Mariusz Borsa via llvm-commits]

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@@ -3505,7 +3505,7 @@ void FunctionStackPoisoner::processStaticAllocas() {
       SplitBlockAndInsertIfThenElse(Cmp, Ret, &ThenTerm, &ElseTerm);
 
       IRBuilder<> IRBPoison(ThenTerm);
-      if (StackMallocIdx <= 4) {
+      if (ASan.MaxInlinePoisoningSize != 0 && StackMallocIdx <= 4) {
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wrotki wrote:

 Perhaps I used wrong setting for this (MaxInlinePoisoningSize), which caused misunderstanding.  I want no inline shadow accesses at all. So this optimization `StackMallocIdx <= 4)` for small frames should be turned off (use code under else)  when  ClInstrumentationWithCallsThreshold() == 0. Would that work / be more explicit when I change it to be this way?




https://github.com/llvm/llvm-project/pull/75555