================
@@ -1664,6 +1710,17 @@ CodeGenFunction::EmitAutoVarAlloca(const VarDecl &D) {
emission.getOriginalAllocatedAddress(),
emission.getSizeForLifetimeMarkers());
+ // Analogous to lifetime markers, we use a 'cleanup' to emit fake.use
+ // calls for local variables. We are exempting volatile variables and
+ // non-scalars larger than 4 times the size of an unsigned int (32 bytes).
----------------
jmorse wrote:
16 bytes presumably, or 32 bits for unsigned int? Best to avoid being too
specific IMO as it's machine dependent. (Perhaps all the world's a VAX, but we
can avoid saying it in comments).
https://github.com/llvm/llvm-project/pull/110102
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