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| author | Jakub Jelinek <jakub@redhat.com> | 2018-07-06 23:42:41 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-07-06 23:42:41 +0200 |
| commit | f290100275139ccb59832bb75ff7fb2606e110d7 (patch) | |
| tree | 18cda432e83a3fcae530b889830983dd4a7f0efb /gcc/fold-const.h | |
| parent | 8de583fc5301987f31e1897e07d545e218b943da (diff) | |
| download | gcc-f290100275139ccb59832bb75ff7fb2606e110d7.zip gcc-f290100275139ccb59832bb75ff7fb2606e110d7.tar.gz gcc-f290100275139ccb59832bb75ff7fb2606e110d7.tar.bz2 | |
re PR tree-optimization/86401 (The "For constants M and N, if M == (1LL << cst) - 1 && (N & M) == M,..." opts are only in fold-const.c and in RTL)
PR tree-optimization/86401
* fold-const.c (fold_binary_loc) <case BIT_AND_EXPR>: Move the
((A & N) + B) & M -> (A + B) & M etc. optimization into ...
(fold_bit_and_mask): ... here. New helper function for match.pd.
* fold-const.h (fold_bit_and_mask): Declare.
* match.pd (((A & N) + B) & M -> (A + B) & M): New optimization.
* gcc.dg/tree-ssa/pr86401-1.c: New test.
* gcc.dg/tree-ssa/pr86401-2.c: New test.
* c-c++-common/rotate-9.c: New test.
From-SVN: r262485
Diffstat (limited to 'gcc/fold-const.h')
| -rw-r--r-- | gcc/fold-const.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/fold-const.h b/gcc/fold-const.h index 337818a..c64b8d0 100644 --- a/gcc/fold-const.h +++ b/gcc/fold-const.h @@ -96,6 +96,9 @@ extern tree omit_two_operands_loc (location_t, tree, tree, tree, tree); extern tree invert_truthvalue_loc (location_t, tree); extern tree fold_unary_to_constant (enum tree_code, tree, tree); extern tree fold_binary_to_constant (enum tree_code, tree, tree, tree); +extern tree fold_bit_and_mask (tree, tree, enum tree_code, + tree, enum tree_code, tree, tree, + tree, enum tree_code, tree, tree, tree *); extern tree fold_read_from_constant_string (tree); extern tree int_const_binop (enum tree_code, const_tree, const_tree); #define build_fold_addr_expr(T)\ |