Vyacheslav Levytskyy 23b058cb7f [SPIR-V] Re-implement switch and improve validation of forward calls (#87823) ...

This PR fixes issue https://github.com/llvm/llvm-project/issues/87763
and preserves valid CFG in cases when previous scheme failed to generate
valid code for a switch statement. The PR hardens one existing test case
and adds one more test case as a validation of a new switch generation.
Tests are passing spirv-val now.

This PR also improves validation of forward calls.

2024-04-09 16:15:44 +02:00

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