[llvm] [AMDGPU][GlobalISel] Enable vector reductions (PR #131413)

[Matt Arsenault via llvm-commits]

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@@ -350,6 +350,12 @@ static std::initializer_list<LLT> AllS32Vectors = {
 static std::initializer_list<LLT> AllS64Vectors = {V2S64, V3S64, V4S64, V5S64,
                                                    V6S64, V7S64, V8S64, V16S64};
 
+static std::initializer_list<LLT> AllVectors{
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arsenm wrote:

should all of these lists be static const? 

https://github.com/llvm/llvm-project/pull/131413