[RISCV] Add missing constraints for vwsll

Add missing early clobber and widen constraints for vector crypto instruction: vwsll

Differential Revision: https://reviews.llvm.org/D149127

Author: 4vtomat

llvm/lib/Target/RISCV/RISCVInstrInfoZvk.td

@@ -138,6 +138,7 @@ let Predicates = [HasStdExtZvbb] in {
   def  VREV8_V  : VALUVs2<0b010010, 0b01001, OPMVV, "vrev8.v">;
   defm VROL_V   : VALU_IV_V_X<"vrol", 0b010101>;
   defm VROR_V   : VROR_IV_V_X_I<"vror", 0b010100>;
+  let Constraints = "@earlyclobber $vd", RVVConstraint = WidenV in
   defm VWSLL_V  : VALU_IV_V_X_I<"vwsll", 0b110101, uimm5>;
 } // Predicates = [HasStdExtZvbb]
 

llvm/test/MC/RISCV/rvv/zvbb-invalid.s

@@ -0,0 +1,14 @@
+# RUN: not llvm-mc -triple=riscv64 --mattr=+zve64x --mattr=+experimental-zvbb %s 2>&1 \
+# RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
+
+vwsll.vv v2, v2, v4
+# CHECK-ERROR: The destination vector register group cannot overlap the source vector register group.
+# CHECK-ERROR-LABEL: vwsll.vv v2, v2, v4
+
+vwsll.vx v2, v2, x10
+# CHECK-ERROR: The destination vector register group cannot overlap the source vector register group.
+# CHECK-ERROR-LABEL: vwsll.vx v2, v2, x10
+
+vwsll.vi v2, v2, 1
+# CHECK-ERROR: The destination vector register group cannot overlap the source vector register group.
+# CHECK-ERROR-LABEL: vwsll.vi v2, v2, 1