[SPIRV] Prevent creation of jump tables from switch #82287
Merged
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This PR is to prevent creation of jump tables from switch. The reason is that SPIR-V doesn't know how to lower jump tables, and a sequence of commands that IRTranslator generates for switch via jump tables breaks SPIR-V Backend code generation with complains to G_BRJT. The next example is the shortest code to break SPIR-V Backend code generation in this way:
To resolve the issue we set a high lower limit for number of blocks in a jump table via getMinimumJumpTableEntries() and prevent undesirable (or rather unsupported at the moment) path of code generation.