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codegen.c: allow constant folding for negative integer modulo.

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2021-08-02 16:48:16 +09:00
parent 81d56477f2
commit 4fa24e4ff9
1 changed files with 5 additions and 2 deletions
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mrbgems/mruby-compiler/core/codegen.c
+5 -2
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@@ -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;