[llvm] [AArch64][GloablISel] Refactor Combine G_CONCAT_VECTOR (PR #80866)

[David Green via llvm-commits]

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@@ -64,7 +64,7 @@ def AArch64PreLegalizerCombiner: GICombiner<
 }
 
 def AArch64O0PreLegalizerCombiner: GICombiner<
-  "AArch64O0PreLegalizerCombinerImpl", [optnone_combines]> {
+  "AArch64O0PreLegalizerCombinerImpl", [optnone_combines, combine_concat_vector]> {
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davemgreen wrote:

This might not be needed for -O0, and if it is would it be better in optnone_combines?

https://github.com/llvm/llvm-project/pull/80866