[llvm] [VectorCombine] Fix crash when folding select of bitcast (PR #177183)

[Mitch Briles via llvm-commits]

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@@ -0,0 +1,54 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt -passes=vector-combine -S %s | FileCheck %s
+
+define i8 @fold_selects_from_bitcast_dominance() {
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MitchBriles wrote:

Added cross-block test

https://github.com/llvm/llvm-project/pull/177183