[llvm] [AMDGPU] Fix phi injection in si-i1-lowering (PR #179267)

[Shilei Tian via llvm-commits]

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@@ -0,0 +1,164 @@
+# RUN: llc -mtriple=amdgcn -mcpu=gfx90a -run-pass=si-i1-copies -o - %s | FileCheck -check-prefixes=GCN %s
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shiltian wrote:

auto generate check lines pls

https://github.com/llvm/llvm-project/pull/179267