Gcc manuals says all builtin functions are folded in tree optimization passe(given below) that are run after gimplification http://gcc.gnu.org/onlinedocs/gccint/Tree_002dSSA-passes.html#Tree_002dSSA-passes >Folding built-in functions >This pass simplifies built-in functions, as applicable, >with constant arguments or with inferrable string >lengths. It is located in tree-ssa-ccp.c and is >described by pass_fold_builtins. 1)I find _builtin* functions in mmintrin.h, xmmintrin.h and emmintrin.h........ I think 'Folding built-in functions' is the pass that replaces _builtin functions when a program is compiled. Am I right? ___________________________________________________________ New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes. http://uk.rd.yahoo.com/evt=44106/*http://mail.yahoo.net/uk
