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Port codegen-soundness fixes from harfbuzz/packtab#9 - #2

Merged

behdad merged 7 commits into

mainfrom

port-packtab-pr9-codegen-soundness

Jul 3, 2026

Merged

Port codegen-soundness fixes from harfbuzz/packtab#9#2
behdad merged 7 commits into
mainfrom
port-packtab-pr9-codegen-soundness

Commits on Jul 1, 2026
- Fix inline-constant packing for values ≥ 16 bits
  
  behdad
  and
  claude
  committed
  a239dfc
- Widen return type to hold the default value
  
  behdad
  and
  claude
  committed
  e10d0ce
- Honor palette array start offset in palette lookup
  
  behdad
  and
  claude
  committed
  f595b13
- Keep the cost frontier when pruning, not just full-cost
  
  behdad
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  claude
  committed
  c6da040
- Add codegen-soundness regression tests
  
  behdad
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  claude
  committed
  992d742
- Drop the dead padding byte from odd-length flat tables
  
  behdad
  and
  claude
  committed
  04ee753
- Make --analyze Score use exact log2, matching pick_solution
  
  behdad
  and
  claude
  committed
  558be7e