[clang] [llvm] [SPIRV] Add support for the `SPV_EXT_long_vector` extension (PR #210279)

[Marcos Maronas via cfe-commits]

================
@@ -0,0 +1,64 @@
+; RUN: llc -verify-machineinstrs -O0 --spirv-ext=+SPV_EXT_long_vector -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
+; spirv-val does not yet handle long vectors of pointers even though the rules are the same as for OpTypeVector
----------------
maarquitos14 wrote:

Should we open an issue on spirv-tools repo for this?

https://github.com/llvm/llvm-project/pull/210279