Slightly simplify the simd_shuffle impl

Author: bjorn3

src/intrinsics/simd.rs

@@ -182,11 +182,9 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
 
 // Make sure this is actually a SIMD vector.
 let idx_ty = fx.monomorphize(idx.node.ty(fx.mir, fx.tcx));
-let n:u16 = if idx_ty.is_simd()
-&& matches!(idx_ty.simd_size_and_type(fx.tcx).1.kind(), ty::Uint(ty::UintTy::U32))
+if!idx_ty.is_simd()
+|| !matches!(idx_ty.simd_size_and_type(fx.tcx).1.kind(), ty::Uint(ty::UintTy::U32))
 {
- idx_ty.simd_size_and_type(fx.tcx).0.try_into().unwrap()
-}else{
  fx.tcx.dcx().span_err(
  span,
 format!("simd_shuffle index must be a SIMD vector of `u32`, got `{}`", idx_ty),
@@ -195,6 +193,7 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
  fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
 return;
 };
+let n:u16 = idx_ty.simd_size_and_type(fx.tcx).0.try_into().unwrap();
 
 assert_eq!(x.layout(), y.layout());
 let layout = x.layout();