llvm / llvm/circt

[SV, Comb, HW] Missing assignments canonicalization

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Description

// A: !hw.array<i6x4>, B: int
A[2'h0] <= B[81:76];
A[2'h1] <= B[87:82];	
A[2'h2] <= B[93:88];	
A[2'h3] <= B[99:94];	
=>
A[3:0] <= B[99:76]
  wire [2:0][2:0]  A = {{B[152:150]}, {B[149:147]}, {B[146:144]}};
  => wire [2:0][2:0] A = B[152:144];

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Research direction

The issue gives two SystemVerilog assignment examples for SV, Comb, and HW canonicalization, but names no implementation files or tests. Start by locating the relevant canonicalization entry point and use both examples as acceptance cases: equivalent missing assignments should be combined into the compact assignments shown.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
compilers
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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