dist/gcc/tree-ssa-ccp.c

3139   gimple *defstmt = SSA_NAME_DEF_STMT (vuse);
3143   if (gimple_store_p (defstmt)
3144       && gimple_assign_single_p (defstmt)
3145       && TREE_CODE (gimple_assign_rhs1 (defstmt)) == CONSTRUCTOR
3146       && !gimple_clobber_p (defstmt))
3147     src2 = gimple_assign_lhs (defstmt);
3148   else if (gimple_call_builtin_p (defstmt, BUILT_IN_MEMSET)
3149 	   && TREE_CODE (gimple_call_arg (defstmt, 0)) == ADDR_EXPR
3150 	   && TREE_CODE (gimple_call_arg (defstmt, 1)) == INTEGER_CST)
3152       src2 = TREE_OPERAND (gimple_call_arg (defstmt, 0), 0);
3153       len2 = gimple_call_arg (defstmt, 2);
3154       val = gimple_call_arg (defstmt, 1);
3200       print_gimple_stmt (dump_file, defstmt, 0, dump_flags);