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| author | Richard Henderson <rth@redhat.com> | 2012-06-27 14:30:51 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2012-06-27 14:30:51 -0700 |
| commit | 98449720f700d3460a6756f48c4870f3e9a3a6fd (patch) | |
| tree | 0ff9298f4b499b29ab5996ba2f0360c7401e22d1 /gcc/fold-const.c | |
| parent | ff4d1662c887e1c43fde5d14c7835210d3a37063 (diff) | |
| download | gcc-98449720f700d3460a6756f48c4870f3e9a3a6fd.zip gcc-98449720f700d3460a6756f48c4870f3e9a3a6fd.tar.gz gcc-98449720f700d3460a6756f48c4870f3e9a3a6fd.tar.bz2 | |
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.
From-SVN: r189027
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 877cf32..702f4e0 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: |