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| author | Richard Kenner <kenner@gcc.gnu.org> | 1995-05-31 20:57:17 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1995-05-31 20:57:17 -0400 |
| commit | d8f1376cd944b22104d586a65a0026fbdceb622d (patch) | |
| tree | f86fee0b8a4fdcc8e8c860c6e8da0635c9fe4b29 | |
| parent | 4c64a85262abba7799c4fddeb0a350c34fde4cb2 (diff) | |
| download | gcc-d8f1376cd944b22104d586a65a0026fbdceb622d.zip gcc-d8f1376cd944b22104d586a65a0026fbdceb622d.tar.gz gcc-d8f1376cd944b22104d586a65a0026fbdceb622d.tar.bz2 | |
(expand_mult_highpart): Use wide_op1 for all multiplies.
(expand_divmod): Undo Nov 12 change. Instead, add special case
for division by MIN_INT in signed TRUNC_DIV_EXPR case.
From-SVN: r9857
| -rw-r--r-- | gcc/expmed.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index 3a7bbe7..bf5b652 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -2577,7 +2577,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp, max_cost) { mul_highpart_optab = unsignedp ? umul_highpart_optab : smul_highpart_optab; target = expand_binop (mode, mul_highpart_optab, - op0, op1, target, unsignedp, OPTAB_DIRECT); + op0, wide_op1, target, unsignedp, OPTAB_DIRECT); if (target) return target; } @@ -2588,7 +2588,7 @@ expand_mult_highpart (mode, op0, cnst1, target, unsignedp, max_cost) { mul_highpart_optab = unsignedp ? smul_highpart_optab : umul_highpart_optab; target = expand_binop (mode, mul_highpart_optab, - op0, op1, target, unsignedp, OPTAB_DIRECT); + op0, wide_op1, target, unsignedp, OPTAB_DIRECT); if (target) /* We used the wrong signedness. Adjust the result. */ return expand_mult_highpart_adjust (mode, target, op0, @@ -2827,9 +2827,7 @@ expand_divmod (rem_flag, code, mode, op0, op1, target, unsignedp) case TRUNC_DIV_EXPR: if (op1_is_constant && HOST_BITS_PER_WIDE_INT >= size) { - if (unsignedp - || (INTVAL (op1) - == (HOST_WIDE_INT) 1 << (GET_MODE_BITSIZE (compute_mode) - 1))) + if (unsignedp) { unsigned HOST_WIDE_INT mh, ml; int pre_shift, post_shift; @@ -2958,6 +2956,10 @@ expand_divmod (rem_flag, code, mode, op0, op1, target, unsignedp) else if (d == -1) quotient = expand_unop (compute_mode, neg_optab, op0, tquotient, 0); + else if (INTVAL (op1) == (HOST_WIDE_INT) 1 << (size - 1)) + /* This case is not handled correctly below. */ + quotient = emit_store_flag (tquotient, EQ, op0, op1, + compute_mode, 1, 1); else if (EXACT_POWER_OF_2_OR_ZERO_P (d) && (rem_flag ? smod_pow2_cheap : sdiv_pow2_cheap)) ; |