[clang] [clang] Trim large(-ish) includes from common headers (PR #216946)

[Chandler Carruth via cfe-commits]

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@@ -19,6 +19,7 @@
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/StringExtras.h"
+#include "llvm/IR/DerivedTypes.h"
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chandlerc wrote:

Here it is needed to get LLVM's max bits in an `IntegerType` and use that to set the max bits in `_BitInt(N)`. =/ If we want to fix the layering, would need to extract this limit to somewhere else.

https://github.com/llvm/llvm-project/pull/216946