[llvm] [BlockExtractor] Invalidate analyses after splitting landing pads (PR #217853)

[Aiden Grossman via llvm-commits]

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@@ -0,0 +1,33 @@
+; RUN: opt -passes='function(require<domtree>),extract-blocks,function(require<domtree>)' -debug-pass-manager -disable-output %s 2>&1 | FileCheck %s
+; RUN: opt -passes='function(require<domtree>),extract-blocks,function(verify<domtree>)' -disable-output %s
+
+; The landing pad split runs even with an empty block list, so the CFG changes.
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boomanaiden154 wrote:

Add a second sentence to the tune of `Ensure that we properly invalidate analyses.` or something like that.

https://github.com/llvm/llvm-project/pull/217853