[llvm] [RISCV] Add a rematerializable pseudo instruction for LUI+ADDI for global addresses. (PR #93142)

[Pengcheng Wang via llvm-commits]

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@@ -1311,6 +1311,22 @@ def : Pat<(FrameAddrRegImm (iPTR GPR:$rs1), simm12:$imm12),
 
 /// HI and ADD_LO address nodes.
 
+let Size = 8, isReMaterializable = 1 in
+def PseudoLIaddr : Pseudo<(outs GPR:$dst), (ins uimm20_lui:$hi, simm12:$lo), []>,
+                     Sched<[WriteIALU]>;
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wangpc-pp wrote:

Don't we need `SchedRead`s here?

https://github.com/llvm/llvm-project/pull/93142