[clang] [libc++] Add builtin to clear padding bytes (prework for P0528R3) (PR #75371)

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@@ -60,9 +60,14 @@
 #include "llvm/Support/ScopedPrinter.h"
 #include "llvm/TargetParser/AArch64TargetParser.h"
 #include "llvm/TargetParser/X86TargetParser.h"
+#include <algorithm>
 #include <optional>
 #include <sstream>
 
+
+
+#include <iostream>
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huixie90 wrote:

changing it to llvm::dbgs() now. will remove it once the patch is ready

https://github.com/llvm/llvm-project/pull/75371