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| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 7 |
2 files changed, 12 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ea6fbbb..2f6b1a4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Mon Jun 14 12:57:38 1999 David Mosberger <davidm@hpl.hp.com> + + * combine.c (simplify_logical, case AND): Only call + simplify_and_const_int if the mode is no wider than HOST_WIDE_INT + or the constant is positive. + Mon Jun 14 11:43:41 1999 Nick Clifton <nickc@cygnus.com> * configure.in: Fix typo in rs6000-ibm-aix4 case. diff --git a/gcc/combine.c b/gcc/combine.c index 0b64a86..60e0ef2 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -4902,7 +4902,12 @@ simplify_logical (x, last) && ! side_effects_p (op1)) x = gen_binary (AND, mode, XEXP (XEXP (op0, 0), 0), op1); - if (GET_CODE (op1) == CONST_INT) + /* We can call simplify_and_const_int only if we don't lose + any (sign) bits when converting INTVAL (op1) to + "unsigned HOST_WIDE_INT". */ + if (GET_CODE (op1) == CONST_INT + && (GET_MODE_BITSIZE (mode) <= HOST_BITS_PER_WIDE_INT + || INTVAL (op1) > 0)) { x = simplify_and_const_int (x, mode, op0, INTVAL (op1)); |