[PATCH] D115832: [DFAJumpThreading] Determinator BB should precede switch-defining BB

[Alexey Zhikhartsev via Phabricator via llvm-commits]

alexey.zhikhar created this revision.
alexey.zhikhar added reviewers: SjoerdMeijer, amehsan.
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Otherwise, it is possible that the state defined in the determinator
block defines the state for the next iteration of the loop, rather than
for the current one.

      

Fixes llvm-test-suite's
SingleSource/Regression/C/gcc-c-torture/execute/pr80421.c
on X86.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115832

Files:
  llvm/lib/Transforms/Scalar/DFAJumpThreading.cpp
  llvm/test/Transforms/DFAJumpThreading/dfa-jump-threading-analysis.ll

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