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| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 8 |
2 files changed, 9 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 95052f2..c6ad7eb 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2003-10-01 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> + + * fold-const.c (make_range): When handling unsigned, don't reverse + range if high bound is zero. + 2003-09-30 Alexandre Oliva <aoliva@redhat.com> config/frv/frv.h (PREDICATE_CODES): Added diff --git a/gcc/fold-const.c b/gcc/fold-const.c index f5a6f78..250d659 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3076,10 +3076,10 @@ make_range (tree exp, int *pin_p, tree *plow, tree *phigh) in_p = n_in_p, low = n_low, high = n_high; - /* If the high bound is missing, but we - have a low bound, reverse the range so - it goes from zero to the low bound minus 1. */ - if (high == 0 && low) + /* If the high bound is missing, but we have a non-zero low + bound, reverse the range so it goes from zero to the low bound + minus 1. */ + if (high == 0 && low && ! integer_zerop (low)) { in_p = ! in_p; high = range_binop (MINUS_EXPR, NULL_TREE, low, 0, |