[llvm] [AMDGPU] RewriteMFMAFormStage: fix SpillCost early-return missing reset (PR #199708)

[via llvm-commits]

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@@ -0,0 +1,177 @@
+; RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx950 \
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xgxanq wrote:

> auto generate the check lines pls.
> 
> https://llvm.org/docs/AMDGPU/DeveloperGuideline.html#auto-generate-check-lines

These auto-generated CHECK lines carry undef markers, which will fail  in "[Labelling new pull requests / greeter (pull_request_target)]" and we don’t need to check them line by line.

https://github.com/llvm/llvm-project/pull/199708