[MooreToCore] Add nested moore.conditional support #8125
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This code adds correct lowering for nested ternary operators like this:
```verilog
module Mod(input a, input b, output logic [1:0] c);
always_comb
c = a ? b ? 2'd0 : 2'd1 : 2'd2;
endmodule
```
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| if (operation->hasTrait<OpTrait::HasRecursiveMemoryEffects>()) | ||
| return WalkResult::advance(); |
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| %5 = moore.conditional %4 : l1 -> l2 { | ||
| %6 = moore.read %b_1 : <l1> | ||
| %7 = moore.conditional %6 : l1 -> l2 { | ||
| moore.yield %2 : l2 | ||
| } { | ||
| moore.yield %1 : l2 | ||
| } | ||
| moore.yield %7 : l2 | ||
| } { | ||
| moore.yield %0 : l2 | ||
| } |
There was a problem hiding this comment.
This test uses quite a few other supporting operations (module, nets, variables, procedure, blocking assigns) to test the conditional lowering. Would it be possible to move just the conditionals and the corresponding checks into a func.func, similar to @Conversions just below? It might be possible to even move it inside of @Conversions. That would make the test less brittle if any of the module and procedure lowerings change, which are unrelated to the conditionals.
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Hi! This code adds correct lowering for nested ternary operators like this: