================
@@ -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).
+ // Larger non-scalars are often allocated in memory and may create
unnecessary
+ // overhead.
+ if (CGM.getCodeGenOpts().ExtendLifetimes) {
+ if (extendLifetime(getContext(), CurCodeDecl, D, CXXABIThisDecl))
+ EHStack.pushCleanup<FakeUse>(NormalFakeUse,
+ emission.getAllocatedAddress());
----------------
jmorse wrote:
I see the nearby EHStack cleanup code uses getOriginalAllocatedAddress --
should we be using that instead? Related comments talk about there being a
difference the address and the object; dunno what to make of that, but it's
worth checking.
https://github.com/llvm/llvm-project/pull/110102
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
