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| author | Yukihiro "Matz" Matsumoto <[email protected]> | 2021-08-02 16:48:16 +0900 |
|---|---|---|
| committer | Yukihiro "Matz" Matsumoto <[email protected]> | 2021-08-02 16:48:16 +0900 |
| commit | 4fa24e4ff9e0617a71f4570ec194a49ca52945e9 (patch) | |
| tree | baa5e18ea860779719e1ee91c0ffcd69cec7a3c9 | |
| parent | 81d56477f2129f6e462b4247bf3d16cb616960c9 (diff) | |
| download | mruby-4fa24e4ff9e0617a71f4570ec194a49ca52945e9.tar.gz mruby-4fa24e4ff9e0617a71f4570ec194a49ca52945e9.zip | |
codegen.c: allow constant folding for negative integer modulo.
| -rw-r--r-- | mrbgems/mruby-compiler/core/codegen.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/mrbgems/mruby-compiler/core/codegen.c b/mrbgems/mruby-compiler/core/codegen.c index 65d14bcf6..467b70e1b 100644 --- a/mrbgems/mruby-compiler/core/codegen.c +++ b/mrbgems/mruby-compiler/core/codegen.c @@ -823,8 +823,11 @@ gen_binop(codegen_scope *s, mrb_sym op, uint16_t dst) if (!mrb_num_shift(s->mrb, n0, -n, &n)) return FALSE; } else if (op == MRB_OPSYM_2(s->mrb, mod)) { - if (n0 < 0 || n < 0) return FALSE; - n = n0 % n; + mrb_int n1 = n0 % n; + if ((n0 < 0) != (n < 0) && n1 != 0) { + n1 += n; + } + n = n1; } else if (op == MRB_OPSYM_2(s->mrb, and)) { n = n0 & n; |