diff options
| author | Richard Henderson <rth@redhat.com> | 2012-06-27 21:30:51 +0000 |
|---|---|---|
| committer | Richard Henderson <rth@redhat.com> | 2012-06-27 21:30:51 +0000 |
| commit | da2a7f576533cf15503296dc9995afbcbe143303 (patch) | |
| tree | 0ff9298f4b499b29ab5996ba2f0360c7401e22d1 /gcc/fold-const.c | |
| parent | 72f710f7390df88ce8cf533c03d915c843697126 (diff) | |
Add MULT_HIGHPART_EXPR
* tree.def (MULT_HIGHPART_EXPR): New.
* cfgexpand.c (expand_debug_expr): Ignore it.
* expr.c (expand_expr_real_2): Handle it.
* fold-const.c (int_const_binop_1): Likewise.
* optabs.c (optab_for_tree_code): Likewise.
* tree-cfg.c (verify_gimple_assign_binary): Likewise.
* tree-inline.c (estimate_operator_cost): Likewise.
* tree-pretty-print.c (dump_generic_node): Likewise.
(op_code_prio, op_symbol_code): Likewise.
* tree.c (commutative_tree_code): Likewise. Also handle
WIDEN_MULT_EXPR, VEC_WIDEN_MULT_HI_EXPR, VEC_WIDEN_MULT_LO_EXPR.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@189027 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 877cf32717e..702f4e06701 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -999,6 +999,16 @@ int_const_binop_1 (enum tree_code code, const_tree arg1, const_tree arg2, &res.low, &res.high); break; + case MULT_HIGHPART_EXPR: + /* ??? Need quad precision, or an additional shift operand + to the multiply primitive, to handle very large highparts. */ + if (TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT) + return NULL_TREE; + tmp = double_int_mul (op1, op2); + res = double_int_rshift (tmp, TYPE_PRECISION (type), + TYPE_PRECISION (type), !uns); + break; + case TRUNC_DIV_EXPR: case FLOOR_DIV_EXPR: case CEIL_DIV_EXPR: case EXACT_DIV_EXPR: |