Michal Paszkowski 59e5cb7b83 [SPIR-V] Do not emit spv_ptrcast if GEP result is of expected type (#78122) ...

Prior to this change spv_ptrcast (and OpBitcast) was never emitted for
GEP resulting pointers. While such SPIR-V was (mostly) accepted by the
NEO GPU driver, the generated SPIR-V was incorrect.

The newly added test (pointers/getelementptr-bitcast-load.ll) verifies
that a correct bitcast is added for more complex cases and passes
spirv-val. The test is based on an OpenCL CTS test (basic/prefetch).

2024-01-15 19:56:11 -08:00

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