[llvm] [SPIRV] Add legalization pass for zero-size arrays (PR #172367)

[Manuel Carrasco via llvm-commits]

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@@ -0,0 +1,19 @@
+; RUN: opt -S -passes=spirv-legalize-zero-size-arrays -mtriple=spirv64-unknown-unknown < %s | FileCheck %s
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mgcarrasco wrote:

@sarnex I tested the PR locally, and `llc -O0 -mtriple=spirv64-unknown-unknown` (all opt levels) and throws `LLVM ERROR: Runtime arrays are not allowed in non-shader SPIR-V modules`. Is this expected? Just checking. 

https://github.com/llvm/llvm-project/pull/172367