[llvm] [LoopUnroll] Consider simplified operands while retrieving TTI instruction cost (PR #70929)

[Matt Arsenault via llvm-commits]

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@@ -50,7 +50,7 @@ for.end:
 }
 
 ; CHECK-LABEL: @test_func_addrspacecast_cost_nonfree(
-; CHECK: br i1 %exitcond
+; CHECK-NOT: br i1 %exitcond
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arsenm wrote:

I don't know have any great ideas. Either split the test file up, or add some filler operations to up the costs in other functions 

https://github.com/llvm/llvm-project/pull/70929