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

[Paul T Robinson via cfe-commits]

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@@ -2543,6 +2543,10 @@ void CodeGenModule::ConstructAttributeList(StringRef Name,
     if (shouldDisableTailCalls())
       FuncAttrs.addAttribute("disable-tail-calls", "true");
 
+    // Suppress the machine instruction scheduler when -fextend-lifetimes is on.
+    if (CodeGenOpts.ExtendLifetimes)
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pogo59 wrote:

Also -fextend-this-ptr? 

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