[llvm] [AArch64][GlobalISel] Adopt some Ld* patterns to reduce codegen regressions (PR #135492)

[Vladislav Dzhidzhoev via llvm-commits]

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@@ -573,3 +573,10 @@ def : Pat<(v2i64 (AArch64dup (i64 (load GPR64sp:$Rn)))),
           (LD1Rv2d GPR64sp:$Rn)>;
 def : Pat<(v1i64 (AArch64dup (i64 (load GPR64sp:$Rn)))),
           (LD1Rv1d GPR64sp:$Rn)>;
+
+defm : LoadInsertPatterns<load, v16i8, v8i8, nxv16i8, i8,
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dzhidzhoev wrote:

I've moved these definitions back to their peers, and added `OnlyGISel` predicate to
1. Ignore them for SDAG
2. Indicate that they are meant for GlobalISel

https://github.com/llvm/llvm-project/pull/135492