[llvm] [CodeGen][NewPM] Port `ReachingDefAnalysis` to new pass manager. (PR #159572)

[via llvm-commits]

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+ # RUN: llc --passes='print<reaching-def>' -filetype=null 2>&1 %s | FileCheck %s
+
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paperchalice wrote:

Set target explicitly, some build bots are not x86 based.

https://github.com/llvm/llvm-project/pull/159572