1c26dd0db4
In https://reviews.llvm.org/D125556 upstream changed sext() and zext() to allow some no-op cases, which previously required use of the *OrSelf() methods, which I assume is what was going on here. The *OrSelf() methods got removed in https://reviews.llvm.org/D125559 after two weeks of deprecation because they came with some bonus (probably-undesired) behavior. Since the behavior of sext() and zext() changed slightly, I kept the old *OrSelf() calls in LLVM 14 and earlier, and only use the new version in LLVM 15. r? @nikic