antcc/test/12-flt.c, branch trunkA little C compilerhttps://git.lemon.rip/antcc/atom?h=trunk2026-03-11T10:37:19+00:00x86_64/isel: fix edge case with branch on float add result2026-03-11T10:37:19+00:00lemonlsof@mailbox.org2026-03-11T10:37:19+00:00urn:sha1:1f3ebe69478f245f69cd6f77db946226557085d2
In `if (x + 1)` the implicit `!= 0` can be omitted for integers, because
the x86 `add` instruction sets the zero flag accordingly. But for floats
it doesn't, so applying that optimization there was wrong. Luckily it
was caught by a nullptr dereference later in `emit::Xjcc()` for the
(missing) unordered branch target, instead of miscompiling.
test/12-flt: add some weird float cmp edgecases2025-12-07T11:34:27+00:00lemonlsof@mailbox.org2025-12-07T11:34:27+00:00urn:sha1:bfc6b66078ab3ec543b8355ad22df1c423bf9a8ctest 12-flt2025-12-05T18:12:30+00:00lemonlsof@mailbox.org2025-12-05T18:12:30+00:00urn:sha1:2054983775165f3ae50b241aae71ccb4969eade4