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Summary: This commit fixes a bug in the FixBrTables pass in which an unconditional branch from the switch header block to the jump table block was not removed before the blocks were combined. The result was an invalid CFG in the MachineFunction. This commit also switches from using bespoke branch analysis and deletion code to using the standard utilities for the same. Reviewers: aheejin, dschuff Subscribers: sbc100, jgravelle-google, hiraditya, sunfish, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D81909
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