[clang] [ExtendLifetimes] Add extend lifetimes to emit fake uses from clang (PR #106724)

[Paul T Robinson via cfe-commits]

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@@ -1412,6 +1420,39 @@ void CodeGenFunction::EmitAndRegisterVariableArrayDimensions(
   }
 }
 
+/// Return the maximum size of an aggregate for which we generate a fake use
+/// intrinsic when -fextend-lifetimes is in effect.
+static uint64_t maxFakeUseAggregateSize(const ASTContext &C) {
+  return 4 * C.getTypeSize(C.UnsignedIntTy);
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pogo59 wrote:

This limit should be documented in the associated release note.

https://github.com/llvm/llvm-project/pull/106724