[llvm] [SPIRV]Added support for extension SPV_INTEL_arbitrary_precision_fixed_point (PR #136085)

[Vyacheslav Levytskyy via llvm-commits]

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+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spirv-ext=+SPV_INTEL_arbitrary_precision_fixed_point,+SPV_INTEL_arbitrary_precision_integers %s -o - | FileCheck %s 
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VyacheslavLevytskyy wrote:

It would be hard to maintain such a test case, let's please simplify it to the bare minimum that you need to test your addition to supported SPIR-V extensions. We need to assure that OpFixedXXX are being generated correctly, so it makes sense to have a very short and concise input that leads to generation of OpFixedXXX and check just OpFixedXXX instructions. At the moment the test case contains a lot of unrelated details that would make maintenance harder.

https://github.com/llvm/llvm-project/pull/136085