diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index dd7d2e1e6b5..af8b708977c 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1407,25 +1407,33 @@ simplify_binary_operation (code, mode, op0, op1) break; case DIV: - if (arg1s == 0) + if (arg1s == 0 + || (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1) + && arg1s == -1)) return 0; val = arg0s / arg1s; break; case MOD: - if (arg1s == 0) + if (arg1s == 0 + || (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1) + && arg1s == -1)) return 0; val = arg0s % arg1s; break; case UDIV: - if (arg1 == 0) + if (arg1 == 0 + || (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1) + && arg1s == -1)) return 0; val = (unsigned HOST_WIDE_INT) arg0 / arg1; break; case UMOD: - if (arg1 == 0) + if (arg1 == 0 + || (arg0s == (HOST_WIDE_INT) 1 << (HOST_BITS_PER_WIDE_INT - 1) + && arg1s == -1)) return 0; val = (unsigned HOST_WIDE_INT) arg0 % arg1; break; |
