[llvm] [RISCV] Use lookup tables to find CVTFOpc (PR #88742)

[Craig Topper via llvm-commits]

================
@@ -66,6 +66,22 @@ using namespace RISCV;
 
 } // namespace llvm::RISCVVPseudosTable
 
+namespace llvm::RISCVVInversePseudosTable {
----------------
topperc wrote:

MC layer doesn't need to know about pseudos. That just bloats llvm-mc and llvm-objdump code size for no reason.

https://github.com/llvm/llvm-project/pull/88742