[llvm] [InstCombine] Limit canonicalization of extractelement(cast) to constant index or same basic block. (PR #166227)

[Nikita Popov via llvm-commits]

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@@ -40,19 +40,50 @@ define i32 @test_bitcast(i32 %i) {
 
 declare void @use(i32)
 
+define void @test_poison_branch(<4 x float> %in, i32 %a, i1 %cond) {
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nikic wrote:

What is this test name referring to? I don't see any poison branch here?

https://github.com/llvm/llvm-project/pull/166227