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| author | Cliff Click <cliffc@acm.org> | 2026-09-25 15:28:21 -0700 |
|---|---|---|
| committer | Cliff Click <cliffc@acm.org> | 2026-09-25 15:28:21 -0700 |
| commit | 29e0127170dce8964d7f85d808d1ec07426d2789 (patch) | |
| tree | f9174685beaf274f3324a08c68f2b0a7137309c2 /chapter09/docs/09-graph1.svg | |
| parent | 12bde12b2e18c8b82b1510ac4305de66d1205e1a (diff) | |
| download | Simple-pr254-fixes.tar.gz Simple-pr254-fixes.zip | |
Restrict subtraction zero peepholes to integer operandspr254-fixes
Require resolved integer mode in chapter 25 so zero subtraction preserves floating-point signed zero. Keep nonnumeric operands in the graph for subtraction diagnostics.
Add signed-zero coverage from chapter 12 and null-subtraction diagnostics from chapter 22. Confirmed the regressions fail on the original PR. Full Make suites pass in chapters 4-25 (5462 tests), including fresh chapter 25 sys.o compilation.
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