[llvm] [InstCombine] Added optimisation for trunc (Pow2 >> x) to i1 (PR #157030)

[Andreas Jonson via llvm-commits]

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@@ -93,3 +93,24 @@ define i1 @test5(i32 %i, ptr %p) {
   ret i1 %op
 }
 
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andjo403 wrote:

add some multi use tests and some negative test
also see https://llvm.org/docs/InstCombineContributorGuide.html for some tips on test and how to commit the tests

https://github.com/llvm/llvm-project/pull/157030