contrib/gcc/tree-ssa-reassoc.c

1026   tree negatedef = tonegate;
1030     negatedef = SSA_NAME_DEF_STMT (tonegate);
1035       && TREE_CODE (negatedef) == MODIFY_EXPR
1036       && TREE_CODE (TREE_OPERAND (negatedef, 0)) == SSA_NAME
1037       && has_single_use (TREE_OPERAND (negatedef, 0))
1038       && TREE_CODE (TREE_OPERAND (negatedef, 1)) == PLUS_EXPR)
1041       tree binop = TREE_OPERAND (negatedef, 1);
1043       bsi = bsi_for_stmt (negatedef);
1046       bsi = bsi_for_stmt (negatedef);
1049       update_stmt (negatedef);
1050       return TREE_OPERAND (negatedef, 0);