[llvm] [RISCV][GISEL] Legalize G_JUMP_TABLE and G_BRJT (PR #71951)

[via llvm-commits]

================
@@ -252,6 +252,12 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST) {
   getActionDefinitionsBuilder({G_FCEIL, G_FFLOOR})
       .libcallFor({s32, s64});
 
+  getActionDefinitionsBuilder(G_JUMP_TABLE).legalFor({p0});
+
+  getActionDefinitionsBuilder(G_BRJT).legalIf([=](const LegalityQuery &Query) {
+    return typeIs(0, p0) && typeInSet(1, {s32, sXLen});
+  });
+
----------------
tschuett wrote:

```.
legalFor({{p0, s32}, {p0, sXLen}});
```

https://github.com/llvm/llvm-project/pull/71951