[llvm] [SPIRV] Fix zero materialization for fp spv_const_composite legalization (PR #186028)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -0,0 +1,26 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
+; RUN: llc -O0 -mtriple=spirv64-unknown-unknown %s -o - | FileCheck %s
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jmmartinez wrote:

Can you feed the output to `spirv-val` as it's done in other tests to ensure the generated SPIRV is valid?

https://github.com/llvm/llvm-project/pull/186028