[llvm] [GlobalIsel][AArch64] legalize ptr add (PR #89218)

[Matt Arsenault via llvm-commits]

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@@ -183,7 +183,9 @@ AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
 
   getActionDefinitionsBuilder(G_PTR_ADD)
       .legalFor({{p0, s64}, {v2p0, v2s64}})
-      .clampScalar(1, s64, s64);
+      .clampScalar(1, s64, s64)
+      .clampNumElements(0, v2p0, v2p0)
+      .clampNumElements(1, v2s64, v2s64);
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arsenm wrote:

These should be redundant? Do we support implicit splat in the second operand? 

https://github.com/llvm/llvm-project/pull/89218