[llvm] [SPIR-V] Derive FPFastMathMode from nofpclass attributes on OpenCL builtins (PR #188984)

[Arseniy Obolenskiy via llvm-commits]

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@@ -0,0 +1,17 @@
+; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64v1.5-unknown-unknown %s -o - | FileCheck %s
+
+; Check that nofpclass attributes produce FPFastMathMode decorations on
+; OpExtInst in Kernel environments even for SPIR-V versions before 1.6,
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aobolensk wrote:

They are not being processed in that scenario. I guess, we can add the tests for that, done

https://github.com/llvm/llvm-project/pull/188984