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(parent: 4b9f619) | patch
opt_expr: simplify any unsigned comparisons with all-0 and all-1.
authorwhitequark <whitequark@whitequark.org>
Wed, 2 Jan 2019 02:45:49 +0000 (02:45 +0000)
committerwhitequark <whitequark@whitequark.org>
Wed, 2 Jan 2019 02:45:49 +0000 (02:45 +0000)
commit8e53d2e0bf3584709cd320447ad5a89a80dcfd94
treec049d8ae6018c9efe0dec86da5bf180ae75a1bf9tree
parent4b9f619349e6b7452739631635ab3b5a4d94b522commit | diff
opt_expr: simplify any unsigned comparisons with all-0 and all-1.

Before this commit, only unsigned comparisons with all-0 would be
simplified. This commit also makes the code handling such comparisons
to be more rigorous and not abort on unexpected input.
passes/opt/opt_expr.cc diff | blob | history
tests/opt/opt_expr_cmp.v [new file with mode: 0644] blob
tests/opt/opt_expr_cmp.ys [new file with mode: 0644] blob