[llvm] [AMDGPU] support 64-bit immediates in SIInstrInfo::FoldImmediate (PR #69260)

[Jay Foad via llvm-commits]

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@@ -151,6 +151,7 @@ def S_MOV_B64_IMM_PSEUDO : SPseudoInstSI <(outs SReg_64:$sdst),
   let SchedRW = [WriteSALU, Write64Bit];
   let Size = 16; // Needs maximum 2 s_mov_b32 instructions 8 byte long each.
   let Uses = [];
+  let UseNamedOperandTable = 1;
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jayfoad wrote:

What is this for?

https://github.com/llvm/llvm-project/pull/69260