This commit adds 2 new instructions in the selector:
- OpAccessChain
- OpInBoundsAccessChain.
The choice between the two relies on the `inbounds` marker.
Those instruction are not used for OpenCL, to maintain the same
behavior as previously. They are only added when building for logical
SPIR-V, as it doesn't support the pointer equivalent.
Because logical SPIR-V doesn't support pointer cast either, the
assign_ptr_type intrinsic need to be generated so OpAccessChain gets
lowered with the correct pointer type, instead of i8*.
Fixes#66107
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Signed-off-by: Nathan Gauër <brioche@google.com>
c01b5bbba3