[llvm] [RISCV][GISEL] Add legalizer for G_BSWAP (PR #70226)

[Craig Topper via llvm-commits]

================
@@ -81,6 +81,11 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST) {
         .clampScalar(BigTyIdx, XLenLLT, XLenLLT);
   }
 
+  getActionDefinitionsBuilder(G_BSWAP)
+    .widenScalarToNextPow2(0)
----------------
topperc wrote:

why is the widenScalar and clampScalar needed? It doens't look like they are being tested.

https://github.com/llvm/llvm-project/pull/70226