[llvm-branch-commits] [llvm] [AMDGPU] Make v2x64 BUILD_VECTOR legal on gfx1251 (PR #204470)

[Matt Arsenault via llvm-branch-commits]

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@@ -920,7 +920,8 @@ SITargetLowering::SITargetLowering(const TargetMachine &TM,
     }
 
     if (Subtarget->hasPackedU64Ops()) {
-      setOperationAction({ISD::ADD, ISD::SUB, ISD::SHL}, MVT::v2i64, Legal);
+      setOperationAction({ISD::ADD, ISD::SUB, ISD::SHL, ISD::BUILD_VECTOR},
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arsenm wrote:

This should be unconditionally legal? I'm surprised it's not already, this is just 2 COPY? Plus should cover v2f64 

https://github.com/llvm/llvm-project/pull/204470