diff options
Diffstat (limited to 'gcc/tree-vrp.c')
| -rw-r--r-- | gcc/tree-vrp.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index 5f9a327..f9615d1 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -3753,7 +3753,11 @@ register_edge_assert_for (tree name, edge e, block_stmt_iterator si, tree cond) if (TREE_CODE (def_stmt) == GIMPLE_MODIFY_STMT && (TREE_CODE (GIMPLE_STMT_OPERAND (def_stmt, 1)) == TRUTH_OR_EXPR - || TREE_CODE (GIMPLE_STMT_OPERAND (def_stmt, 1)) == BIT_IOR_EXPR)) + /* For BIT_IOR_EXPR only if NAME == 0 both operands have + necessarily zero value. */ + || (comp_code == EQ_EXPR + && (TREE_CODE (GIMPLE_STMT_OPERAND (def_stmt, 1)) + == BIT_IOR_EXPR)))) { tree op0 = TREE_OPERAND (GIMPLE_STMT_OPERAND (def_stmt, 1), 0); tree op1 = TREE_OPERAND (GIMPLE_STMT_OPERAND (def_stmt, 1), 1); |