[llvm] [SPIR-V] Add SPV_INTEL_2d_block_io extension (PR #140140)

[Dmitry Sidorov via llvm-commits]

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@@ -0,0 +1,47 @@
+; 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
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MrSidims wrote:

```suggestion
; RUN: llc -O0 -verify-machineinstrs -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_INTEL_2d_block_io %s -o - | FileCheck %s
```

https://github.com/llvm/llvm-project/pull/140140