[llvm] [AArch64][GlobalISel] Legalize ptr shuffle vector to s64 (PR #116013)

[Madhur Amilkanthwar via llvm-commits]

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@@ -1077,7 +1079,16 @@ AArch64LegalizerInfo::AArch64LegalizerInfo(const AArch64Subtarget &ST)
       .clampNumElements(0, v8s8, v16s8)
       .clampNumElements(0, v4s16, v8s16)
       .clampNumElements(0, v4s32, v4s32)
-      .clampNumElements(0, v2s64, v2s64);
+      .clampNumElements(0, v2s64, v2s64)
+      .bitcastIf(
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madhur13490 wrote:

Instead of doing bitcast, why not make v2p0 legal? Generating bitcast and going through PTRTOINT seems sub-optimal.

https://github.com/llvm/llvm-project/pull/116013