[llvm] [NFC][PowerPC] Add test to check lanemasks for subregisters. (PR #94363)

[Stefan Pintilie via llvm-commits]

================
@@ -0,0 +1,67 @@
+# RUN: llc -mcpu=pwr10 -O3 -ppc-track-subreg-liveness -verify-machineinstrs \
+# RUN:   -mtriple=powerpc64le-unknown-linux-gnu -run-pass=greedy,virtregrewriter \
+# RUN:   -debug-only=regalloc -o - %s 2>&1 >/dev/null | FileCheck %s
----------------
stefanp-ibm wrote:

Thank you for looking at this patch.
I've made the changes that you mentioned. 

https://github.com/llvm/llvm-project/pull/94363