[llvm] [llvm][GVN] Propagate `trunc nuw to i1` equalities (PR #143273)

[Andreas Jonson via llvm-commits]

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+; RUN: opt -passes=gvn -S < %s | FileCheck %s
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andjo403 wrote:

think that this https://llvm.org/docs/InstCombineContributorGuide.html#use-update-test-checks-py can be applied here also

https://github.com/llvm/llvm-project/pull/143273