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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7d106cb..45c5cab 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2001-06-14 Andrew Haley <aph@cambridge.redhat.com> + + * combine.c (nonzero_bits): Don't optimize away division by + zero. + 2001-06-15 Zack Weinberg <zackw@stanford.edu> * doc/cpp.texi: Revised and brought up to date. diff --git a/gcc/combine.c b/gcc/combine.c index a9ad710..f64feca 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -8136,18 +8136,26 @@ nonzero_bits (x, mode) result_low = low0 + low1; break; case DIV: + if (width1 == 0) + break; if (! op0_maybe_minusp && ! op1_maybe_minusp) result_width = width0; break; case UDIV: + if (width1 == 0) + break; result_width = width0; break; case MOD: + if (width1 == 0) + break; if (! op0_maybe_minusp && ! op1_maybe_minusp) result_width = MIN (width0, width1); result_low = MIN (low0, low1); break; case UMOD: + if (width1 == 0) + break; result_width = MIN (width0, width1); result_low = MIN (low0, low1); break; |