[llvm] [RISCV] Split WriteVISlideX into WriteVISlideUpX and WriteVISlideDownX (PR #92605)

[Craig Topper via llvm-commits]

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@@ -976,8 +976,12 @@ multiclass VNCLP_IV_V_X_I<string opcodestr, bits<6> funct6> {
 }
 
 multiclass VSLD_IV_X_I<string opcodestr, bits<6> funct6> {
+  // Note: In the future, if VISlideI is also splitted into VISlideUpI and
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topperc wrote:

splitted -> split

https://github.com/llvm/llvm-project/pull/92605