[llvm] [CodeGen] Add MO_LaneMask type and a new COPY_LANEMASK instruction (PR #151944)

[Christudasan Devadasan via llvm-commits]

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@@ -0,0 +1,37 @@
+# RUN: not --crash llc -o - -mtriple=amdgcn-amd-amdhsa -run-pass=none %s 2>&1 | FileCheck %s
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cdevadas wrote:

Ditto: Different test file names ending with indices 0, 1, ... Try to avoid them. Also, try to add a meaningful string for the test names.

https://github.com/llvm/llvm-project/pull/151944