Update llvm/test/CodeGen/SPIRV/extensions/SPV_INTEL_2d_block_io/2d_block_io_generic.ll per comment

Co-authored-by: Dmitry Sidorov <[email protected]>

Author: YuriPlyakhin

llvm/test/CodeGen/SPIRV/extensions/SPV_INTEL_2d_block_io/2d_block_io_generic.ll

@@ -1,5 +1,5 @@
 ; RUN: not llc -O0 -mtriple=spirv64-unknown-unknown %s -o %t.spvt 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR
-; RUN: llc -O0 -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_INTEL_2d_block_io %s -o - | FileCheck %s
+; RUN: llc -O0 -verify-machineinstrs -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_INTEL_2d_block_io %s -o - | FileCheck %s
 
 ; CHECK-ERROR: LLVM ERROR: OpSubgroup2DBlock[Load/LoadTranspose/LoadTransform/Prefetch/Store]INTEL
 ; CHECK-ERROR-SAME: instructions require the following SPIR-V extension: SPV_INTEL_2d_block_io