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| author | James A. Morrison <phython@gcc.gnu.org> | 2005-04-20 02:31:26 +0000 |
|---|---|---|
| committer | James A. Morrison <phython@gcc.gnu.org> | 2005-04-20 02:31:26 +0000 |
| commit | 33ab6245545612b87af5868b4f6e6373cc733791 (patch) | |
| tree | 16946e0d737d4e878583432cead2d91d65f93a7a /gcc/fold-const.c | |
| parent | 72a3b9d27900c00d2b560dfbec36058759ed4f27 (diff) | |
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fold-const (fold_binary): Fold ~X ^ ~ Y to X ^ Y.
2005-04-19 James A. Morrison <phython@gcc.gnu.org>
* fold-const (fold_binary): Fold ~X ^ ~ Y to X ^ Y.
From-SVN: r98434
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index bbd14c0..2c90d0c 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -8174,6 +8174,13 @@ fold_binary (enum tree_code code, tree type, tree op0, tree op1) goto bit_ior; } + /* Convert ~X ^ ~Y to X ^ Y. */ + if (TREE_CODE (arg0) == BIT_NOT_EXPR + && TREE_CODE (arg1) == BIT_NOT_EXPR) + return fold_build2 (code, type, + fold_convert (type, TREE_OPERAND (arg0, 0)), + fold_convert (type, TREE_OPERAND (arg1, 0))); + /* See if this can be simplified into a rotate first. If that is unsuccessful continue in the association code. */ goto bit_rotate; |