--- Ian Lance Taylor <iant@xxxxxxxxxx> wrote: > ranjith kumar <ranjit_kumar_b4u@xxxxxxxxxxx> writes: > > > GCC manuals says the foloowing are the list of > > optimizations turned on when -O1 flag is used. > > > ------------------------------------------------------- > > -fdefer-pop -fdelayed-branch > > -fguess-branch-probability -fcprop-registers > > -floop-optimize -fif-conversion > > -fif-conversion2 -ftree-ccp -ftree-dce > > -ftree-dominator-opts -ftree-dse > > -ftree-ter -ftree-lrs -ftree-sra > > -ftree-copyrename -ftree-fre -ftree-ch > > -fmerge-constants > > -O also turns on -fomit-frame-pointer > on > > machines where doing so does not > > interfere with debugging. > > > > -O doesn?t turn on -ftree-sra for the > Ada > > compiler. This option must be > > explicitly specified on the command > line to > > be enabled for the Ada compiler. > > > ---------------------------------------------------- > > The gcc manual also says: > > Not all optimizations are controlled directly by > a flag. Only > optimizations that have a flag are listed. > > Ian > Sorry. What do you mean? Is there any way to find list of optimizations enabled by -O1? Actually when I explicitly specified all optimizations, there were function calls associated with each SIMD function called in .c file. But when I used -O1 flag they were not present in assembly code. I am intrested in knowing which optimization is replacing those function calls and at what intermediate representation that optimization is done? Thanks. ___________________________________________________________ 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
