[llvm] [VPlan] Compute scalar cost based on VPlan0 instead of legacy CM. (PR #196845)

[David Sherwood via llvm-commits]

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@@ -5,10 +5,49 @@
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
 target triple = "x86_64-apple-macosx10.8.0"
 
-; CHECK: Found an estimated cost of 1 for VF 1 For instruction:   %neg = fneg float %{{.*}}
+; CHECK: Cost of 1 for VF 1: EMIT ir<%neg> = fneg ir<%0>
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david-arm wrote:

Something odd has happened with this test. It has a `; NOTE: Assertions have been autogenerated by utils/update_test_checks.py` at the top, but this can't be right because it should have also dumped out all of the debug information too.

I think it's because the RUN line is piping the debug output into stdout too. Could you fix up this test instead a separate PR? It feels like we should either have two RUN lines for checking IR and debug output, or we should disable IR output and add a filter to update_test_checks.py script to only look for `fneg`.

https://github.com/llvm/llvm-project/pull/196845